Inter-molecular interactions between gas particles have a stronger influence on the properties as pressure rises.
Fluoridated gases have the longest atmospheric lifetime. In a gas, the particles are dispersed. They resemble a "ideal gas," where there is little particle interaction and collisions are completely elastic, under normal pressure and at low temperatures. Inter-molecular interactions between gas particles have a stronger influence on the properties as pressure rises. Because of the space between atoms or molecules, the majority of gases are transparent. Like fluorine and chlorine, some of them have almost no color. Gases usually exhibit weaker responses to electric and gravitational fields than other forms of matter. Gases are less dense and more viscous than liquids and solids.
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Which of the following is often easily separated into its components by simple techniques suchas filtering or decanting?
a.heterogeneous mixture
b.compounds
c.homogeneous mixture
d.elements
e.solutions
Heterogeneous mixtures easily separated into its components by simple techniques suchas filtering or decanting.
What is meant by filtering ?
Employing specialized equipment, remove particles from liquids or gases or specific forms of light: To get rid of any pollutants, the water is filtered.The most typical illustration is brewing tea. Tea leaves and water are separated during tea preparation using a filter or sieve.The pores of the sieve will only let water through. The filtrate, in this case water, is the liquid that has been obtained following filtration.The technique of filtering involves forcing a liquid to flow through the pores of a substance known as a filter in order to separate suspended solid particles from a liquid. The filtrate is the liquid that has gone through the filter.To learn more about filtering refer to
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Can anyone help me out here? I'm really struggling
Answer:
Explanation: Cl2 + 2NaBr ------ 2Nacl+Br2
3H2+N2--------2NH3
2Na+Br2-----2NaBr
Cucl2+H2S----cuS+2Hcl
2Hgo+Cl2-----2Hgcl+O2
C+2H2-----CH4
HELP PLEASE w/ all questions
Answer:
Explanation: 4P+5O2-----2P2O5
Krista is saving money to visit her relatives in Florida. It costs $1,250 for the plane ticket and $250 per night for the hotel. Using the function that represents the cost c based on the number of nights n Krista spends in Florida, how many nights can Krista stay in Florida if she saves $3,500?
Krista can stay 9 nights in Florida if she saves $3,500.
What is linear function?The graph of a linear function is a straight line. The following is the form of a linear function.
a + bx = y = f(x).
One independent variable and one dependent variable make up a linear function. x and y are the independent and dependent variables, respectively.
Given:
Krista is saving money to visit her relatives in Florida.
It costs $1,250 for the plane ticket and $250 per night for the hotel.
Using the function that represents the cost c based on the number of nights n Krista spends in Florida,
f(x) = 250x + 1250.
If f(x) = 3500,
250x + 1250 = 3500
250x = 2250
x = 9
Therefore, she can stay for 9 nights.
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in his atomic theory, dalton proposed that all atoms of a given element are identical. which of the following observations provides the best evidence that the proposal is incorrect?
In his atomic theory, Dalton postulated that every atom of a specific element is identical. Given that CuCu's mass spectrum has two peaks, one at 63 amu and the other at 65 amu, option b is correct.
A scientific theory addressing the composition of matter was put forth by English physicist and chemist John Dalton in 1808. It asserted that the fundamental units of matter are minute, indivisible particles known as "atoms." The number of protons in the nucleus of a pure substance, or chemical element, comprised exclusively of one species of atoms, is known. Chemical elements, as opposed to chemical compounds, cannot be reduced through any chemical process to less complicated molecules.
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The complete question is -
a) The mass spectrum of CuCu has a peak at 123amu and another peak at 26amu.
b) The mass spectrum of CuCu has a peak at 63amu and another peak at 65amu.
c)The mass spectrum of CuCu has a peak at 89amu and another peak at 69amu.
Number of electrons in element F-
Answer:
10
Explanation:
Fluorine has 9 electrons but now it is in its ionic state and the charge is -1 which means it gained one more electron to make it ten
at low temperatures and high pressures ethen gas, c2h4, does not behave like an ideal gas. use chemical principles to explain why this is.
At low temperature and high pressure Ethane gas doesn't not behave like Ideal gas because of its larger molecular size.
Ideal gas is a theoretical gas composed of many randomly moving particles. Ideal gases are called as hypothetical gases which do not exist in nature. Gases exhibit ideal behavior at certain conditions. Ideal gases are assumed to have no interactions among the molecules. The volume of the gases is negligible with respect to the total volume. At low temperature and high pressures the molecules of a gas are very close at each other such that the volume of the gas molecules become significant. The interactions between the atoms become strong enough to affect their properties.
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The proposed rate-determining step for a reaction is2 NO2(g) → NO3(g)+NO(g)The graph above shows the distribution of energies for NO2(g) molecules at two temperatures. Based on the graph, which of the following statements best explains why the rates of disappearance of NO2(g) are different at temperature 2 and temperature 1 ?Pilihan jawabanNO2(g) is consumed at a faster rate at temperature 2 because more molecules possess energies at or above the minimum energy required for a collision to lead to a reaction compared to temperature 1.NO2(g) is consumed at a faster rate at temperature 2 because the molecules have a wider range of energies allowing for a better orientation during a collision compared to temperature 1.Fewer NO2(g) molecules have a relatively high energy at temperature 1, which favors collisions between molecules rather than between the molecules and the container, leading to a faster rate of disappearance compared to temperature 2.More NO2(g) molecules have a relatively low energy at temperature 1, which increases the number of effective collisions taking place and the rate of disappearance compared to temperature 2.
NO2(g) When compared to temperature 1, NO2(g) is burned at a quicker pace at temperature 2 because more molecules have energies at or above the minimum energy.
necessary for a collision to result in a reaction.A reaction's suggested rate-determining step is2NO2(g) + NO3(g) (g)The graph above depicts the energy distribution for NO2(g) molecules at two temperatures. According to the graph, NO2(g)NO2(g) is burned at a quicker rate at temperature 2 because more molecules have energies equal to or greater than the minimum energy necessary for a collision to result in a reaction at temperature 1. The first step in balancing a chemical equation is to identify your reactants and products. Remember, your reactants are on the left side of your equation. The products
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DA chemistry lab requires students to
identify chemical compounds by using
various tests. Each student is given
samples of three different compounds,
labeled A, B, and C. Each student is also
given a list of seven possible compounds.
If a student does not perform the tests and
randomly chooses three from the list, what
is the probability that he guesses all three
correctly?
Answer:
The chance of guessing the first one is 1/9. Second is 1/8. Third is 1/7.
Total is 1/9 x 1/8 x 1/7 = 1/504
Explanation:
The balanced equation for the decomposition of sodium bicarbonate is 2NaHCO3(s) ---> Na2CO3(s) +H2O(g) +CO2 (g),ΔH
=129.2.
Using the enthalpies of formation, calculate the enthalpy of formation of sodium bicarbonate.
Because of this, it is calculated that -1013 kJ/mol is required to produce NaHCO3 N a H C O 3 from its component elements.
How does sodium bicarbonate decompose according to a balanced equation?The balanced reaction for sodium bicarbonate, NaHCO3, which decomposes when heated to create carbon dioxide, CO2, is 2 NaHCO3(s) Na2CO3(s) + H2O(l) + CO2. Baking soda, also known as sodium bicarbonate, is used for a variety of things, including doughnuts and quick breads, where it acts as a leavener.Because of this, it is calculated that -1013 kJ/mol is required to produce NaHCO3 N a H C O 3 from its component elements.For baked items, we typically use sodium bicarbonate (NaHCO3) (N a H C O 3). Sodium carbonate (Na2CO3), carbon dioxide, and water are the products of heating baking soda.To learn more about sodium bicarbonate refer to:
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A positively charged sphere A is brought close without touching to a neutral sphere B. Sphere B is touched with a grounded wire. What is the charge on sphere B after the wire is removed?
The contact of the charged aluminum plate with the neutral metal spherical causes it to become charged.
What occurs when two spheres with different charges come into contact?Contact between a charged object and a neutral object constitutes charging by conduction. Consider touching a neutral metal sphere with an aluminum plate that is positively charged. The contact of the charged aluminum plate with the neutral metal spherical causes it to become charged.The positive charges on a positively charged conducting sphere will migrate in the direction of the uncharged conducting sphere when it is brought close to (but not touching) an uncharged conducting sphere (that is, one with no excess charge).The contact of the charged aluminum plate with the neutral metal spherical causes it to become charged.To learn more about spheres refer to:
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a mixture containing equal numbers of moles of ethyl acetate and butyl acetate was separated using distillation. based on the diagrams, which of the following identifies the substance that would be initially present in higher concentration in the distillate and correctly explains why that occurs?
The substance that would be initially present in higher concentration in the distillate is the component with the lower boiling point.
During distillation, a mixture is heated, and the components of the mixture vaporize at different temperatures. The component with the lower boiling point will vaporize at a lower temperature than the component with the higher boiling point. When the vapor is condensed, it will be in the form of a liquid that contains a higher concentration of the component that had a lower boiling point.In the case of a mixture containing equal numbers of moles of ethyl acetate and butyl acetate, Ethyl acetate has a boiling point of 77°C while Butyl acetate has a boiling point of 126°C. Therefore, Ethyl acetate would be the component that would be initially present in higher concentration in the distillate because it has a lower boiling point than butyl acetate and will vaporize at a lower temperature.
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lithium, cesium, potassium, sodium, rubidium place the elements above in order from smallest atomic radius to largest atomic radius: place the elements above in order from smallest ionization energy to largest ionization energy: place the elements above in order from smallest electronegativity to largest electronegativity:
Smallest atomic radius to largest atomic radius: sodium, potassium, rubidium, cesium, lithium
What is atomic radius?
Atomic radius is a measurement of an atom's size. It is usually determined by the distance between the nucleus and the outermost electron shell of an atom. Atomic radius is measured in picometers (pm), which is one trillionth of a meter. Generally, the larger the atomic radius, the larger the atom.Atomic radius is related to the element's atomic number, which is the number of protons in the nucleus of an atom.
Smallest atomic radius to largest atomic radius: sodium, potassium, rubidium, cesium, lithium
Smallest ionization energy to largest ionization energy: sodium, potassium, rubidium, lithium, cesium
Smallest electronegativity to largest electronegativity: sodium, potassium, rubidium, lithium, cesium
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which of the following types of reactions will reach dynamic equilibrium? multiple select question. weak bases in water gas-forming reactions in an open system weak acids in water reactions where the product is removed
Only reversible reactions may reach dynamic equilibrium, which happens when the rates of the forward and reverse processes are identical.
When a system is in a state of dynamic equilibrium, the reversible reaction that is occurring in it no longer changes the ratio of reactants to products, but there is still movement of substances between the reactants and products. Because reactants and products continue to alter even after equilibrium has been reached, chemical equilibrium is dynamic in nature. Dynamic equilibrium is a condition in which bodies are moving at a constant speed as opposed to static equilibrium, which is a state in which bodies are at rest (rectilinear motion). The total amount of pressures exerted on them in both situations is zero.
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Only reversible reactions may reach dynamic equilibrium, which happens when the rates of the forward and reverse processes are identical.
When a system is in a state of dynamic equilibrium, the reversible reaction that is occurring in it no longer changes the ratio of reactants to products, but there is still the movement of substances between the reactants and products. Because reactants and products continue to alter even after equilibrium has been reached, chemical equilibrium is dynamic in nature. Dynamic equilibrium is a condition in which bodies are moving at a constant speed as opposed to static equilibrium, which is a state in which bodies are at rest (rectilinear motion). The total amount of pressure exerted on them in both situations is zero.
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_BaCl2 + _K3N → _Ba3N2 + _KCl
How many moles of BaCl2 do you need to react with 5.3 moles of K3N?
a
12.5 mol
b
18.0 mol
c
3.53 mol
d
7.95 mol
According to the balanced chemical equation and stoichiometry, 7.95 moles of barium chloride will react with 5.3 moles of K₃N.
What is stoichiometry?It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.
As per the chemical equation, 3 moles of barium chloride give 2 moles of potassium nitride , thus 5.3 moles of potassium nitride will give 3×5.3 /2=7.95 moles .
Thus , 7.95 moles of barium chloride will react with 5.3 moles of K₃N.
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Chemistry final
HELP!!!!HELPP please
1) Shown in the image attached
2) Shown in the image attached
3)
a) Copper II sulfate
b) Aluminum chloride
c) Barium nitride
d) Iron III oxide
e) Lithium fluoride
4) Shown in the image attached
What are isotopes?We know that isotopes are the atoms that have the same atomic number but note the same mass number. The models of the isotope Lithium -8 is shown in the image attached.
The orbital diagram shows the arrangement of the elements that are in the atom. The orbital diagrams of nitrogen is shown in the image attached.
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based on the reading and your knowledge of environmental science, suggest a reason why nitrogen is typically present in the largest quantity in inorganic fertilizer.
One reason why nitrogen is typically present in the largest quantity in inorganic fertilizer is because it is an essential nutrient for plant growth.
What are fertilizers?
Fertilizer is a substance added to soil to provide plants with essential nutrients such as nitrogen, phosphorus, and potassium. The primary purpose of fertilizer is to increase crop yields and improve the overall health of plants. Fertilizers can be organic or inorganic.
Nitrogen is a key component of chlorophyll, the molecule in plants that allows them to absorb light and use it to photosynthesize. Without sufficient nitrogen, plants cannot produce enough chlorophyll and will not grow well. Nitrogen is also necessary for the production of amino acids, which are the building blocks of proteins, and for the synthesis of nucleic acids, which are necessary for cell growth and replication.
Another reason is that Nitrogen is abundant in the atmosphere, comprising 78% of it, and is relatively easy to convert to a form that can be used by plants. Nitrogen can be converted to ammonia, which is a common ingredient in inorganic fertilizers, through the Haber-Bosch process, which uses high temperatures and pressures to combine nitrogen and hydrogen.
Additionally, Nitrogen is relatively cheap and easy to produce, making it a cost-effective choice for fertilizer manufacturers.
In summary, Nitrogen is an essential element for plant growth, abundant and relatively easy to convert to a form that can be used by plants and cost-effective, that's why it is present in the largest quantity in inorganic fertilizers.
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pure semiconductor materials are mixed with impurities to form p or n type materials. a p type material is .
P or N type materials are created by combining pure semiconductor materials with impurities. When an impurity is combined with three valence electrons to give the compound a net positive charge, a P type material is created.
the components, ingredients, or materials from which something is formed or may be made. (2): material that possesses distinguishing characteristics that allow for categorization. sticky substance Any substance used to create an object is referred to as a material. Different materials include clay, glass, paper, wax, air, water, and chalk. Matter is the basis of all materials. Metals, polymers, and ceramics are the three main categories of materials. Steel, fabric, and ceramics are a few examples of them. These classes often have quite distinct origins, traits, and uses. Undoubtedly, materials have a bigger role in our society than we know. Almost every aspect of our everyday lives—including communication, response, shelter, clothing, and food production—is impacted by materials.
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Question:
Define the following terms associated with titration:
A) Standard solution
B) Endpoint
C) Indicator
Titration
Chemical titrations are reactions performed to determine some property of a solution. In a titration experiment, there are two solutions. In one solution a property is known, and that property is used to discover something about the other solution. Often, a preset volume of the known solution is required to bring about a certain change in the unknown solution.
A titration is a method where the concentration of an unknown solution is ascertained by comparing it to a solution of known concentration.
What is the term titration?Titration is a method of chemical analysis where the amount of a sample's ingredient is determined by adding an exact known amount of a different substance to the measured sample, which the desired constituent reacts with in a specific, known proportion.
An acid-base titration involves gradually adding an unknown base to an acid solution with a known concentration (a standard solution) (or vice versa). To the base, you add a few drops of indicator solution. When the base has been neutralized (when [H+] Equals [OH-]), the indicator's color will change to indicate this. A substance's color changing due to a chemical reaction is an indicator. The pH affects the color of an acid-base indicator, such as phenolphthalein. It is also used redox indicators.
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Give the name of the ion with 13 protons and 10 electrons
Answer:
Explanation:
aluminum
Answer: The aluminum ion
Explanation:
which of the following structures are meso compounds? b, d and e only a and e only d and e only b only
B and D parts are Meso compounds from the structures attached below.
Meso compounds need to contain two or more chiral centers and a symmetry plane that splits the molecule in half. We can only refer to a chemical as a meso compound if it can meet these two requirements.
Part-A-The questioned chemical lacks a plane of symmetry yet contains three chiral centers. It is not a meso compound as a result.
Part-B-In this instance, the molecules have a plane of symmetry and three chiral centers. It is a meso compound as a result.
Part-c-Three chiral centers are present in this chemical, however the symmetry plane is not present. It is not a meso compound as a result.
Part-D-Three chiral centers and one plane of symmetry may be found in this chemical. It is a meso compound as a result.
Part-E-The provided molecule is not a meso compound since it lacks a plane of symmetry.
Part-F-In this instance, a plane of symmetry exists, but there is only one chiral center. It is not a meso compound as a result.
complete question:attached below.
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If 25.0 grams of water at 100°C are heated at a constant rate of 400.0 joules/minute, calculate the time needed
to vaporize the sample completely. SHOW WORK.
I need help please
If 25.0 grams of water at 100°C are heated at a constant rate of 400.0 joules/minute, 56425J needed to vaporize the sample completely.
What is vaporization?
The process of converting a substance from its liquid or solid state into its gaseous (vapor) state is known as vaporization. Boiling is the process of vaporizing a liquid when the environment permits the development of vapor bubbles inside the liquid. Sublimation is the direct transformation of a solid into a vapor.
What is grams?
The gram is a unit of mass in the International System of Units (SI) that is equal to one thousandth of a kilogram. It was originally known as the gramme. Gram. This pen cap weighs around one gram.
Amount of heat required to convert 25g of water at 100°
C to 25g of steam at 100°
C =25×2257J=56425J
Therefore, If 25.0 grams of water at 100°C are heated at a constant rate of 400.0 joules/minute, 56425J needed to vaporize the sample completely.
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determine the chemical feed rate for the alum, the amount of alkalinity consumed by the reaction, and the amount of precipitate produced in mg/l and kg/day?
The amount of precipitate produced in mg/l and kg/day is 57.2753 kg.
What is precipitation?Precipitation is the process of changing a dissolved substance from a super-saturated solution to an insoluble solid in an aqueous solution.
Chemical feed rate :
60 mg per liter we need
60 grams per one m3
60 x 3800 grams = 228 kg per 3800 m³
Since the water flow per day is 3800 m³, alum consumption per day is 228 kg
Alkalinity: The alkalinity requirement for alum is 0.49 mole of alkalinity per one mole of alum. The precipitate formed: For one mole of alum, 2 moles of Al(OH)₃ will form.
So 621 g of alum reacts to form
2 x 78 g of Al(OH)₃ precipitate
228 x 1000g will form:
(228 x 1000 x 156)/621 = 57.2753 kg per day precipitate
Therefore, the amount of precipitate produced in mg/l and kg/day is 57.2753 kg.
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The question is incomplete. Your most probably complete question is given below:
Natural water with a flow of 3800 m3/d is to be treated with an alum dose of 60 mg/L.
a chemist is trying to get two substances to react, but he is unsuccessful. he knows that the two substances should react with one another. which of the following could he do to possibly get the substances to react? (select all that apply)
It's possible that the substances will react to form the product when the substance is heated. The kinetic energy of a substance will increase when heated. Therefore, choice E is the right one.
What is a Chemical reaction?A chemical reaction is the process by which one or more reactants are changed into products, which are new substances. Depending on the reactants, the substances are either chemical elements or compounds.
Since an increase in temperature typically speeds up a reaction by raising the average kinetic energy of the reactant molecules in a solution, heating the solution will cause the formation of product. This will increase the frequency at which different substances in a solution collide, which will cause products to form.
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Complete question:
A chemist is trying to get two substances to react, but he is unsuccessful. He knows that the two substances should react with one another. Which of the following could he do to possibly get the substances to react? (Select all that apply)
a
increase the concentration of one of the substances
b
crush up one of the substances
c
decrease the concentration of one of the substances
d
cool the substances
e
heat the substances
A mass is recorded as 15.02 g. Given the accepted level of uncertainty in any recorded measurement, select the range in which this mass will fall.O 15.01 - 15.03 gO 15.00 - 15.10 g O 14.92 - 15.12 g O 14.95 - 15.05 g
A mass is recorded as 15.02 g. Given the accepted level of uncertainty in any recorded measurement, The correct answer is 15.01 - 15.03 g.
The accepted level of uncertainty in any recorded measurement is typically given as the number of significant figures in the measurement. In this case, the mass is recorded as 15.02 g, which has three significant figures. This means that the true value of the mass could be anywhere within ±0.01 g of the recorded value. Therefore, the range in which this mass will fall is 15.01 - 15.03 g.
Option-15.00 - 15.10 g is not correct as it is greater than ±0.01 g
Option-14.92 - 15.12 g is not correct as it is greater than ±0.01 g
Option-14.95 - 15.05 g is not correct as it is not including the recorded value 15.02g
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Balance the redox reaction occurring in acidic aqueous solution: BrO−3(aq)+N2H4(g)→Br−(aq)+N2(g)
The redox reaction occurring in acidic aqueous solution is BrO3(aq) + 6N2H4(g) → 3Br-(aq) + 3N2(g).
The redox reaction occurring in acidic aqueous solution is: BrO3(aq) + N2H4(g) → Br-(aq) + N2(g)
To balance this redox equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation. Additionally, we need to make sure that the charge is balanced on both sides of the equation.
The unbalanced equation looks like this:
BrO3(aq) + N2H4(g) → Br-(aq) + N2(g)
We can start by balancing the elements:
BrO3(aq) + N2H4(g) → Br-(aq) + N2(g)
Now we can balance the charge:
BrO3(aq) + N2H4(g) → Br-(aq) + N2(g)
Finally, we can check that the number of atoms of each element is the same on both sides of the equation.
The balanced equation is:
BrO3(aq) + 6N2H4(g) → 3Br-(aq) + 3N2(g)
The balanced equation shows that 6 molecules of N2H4 and 3 BrO3 are required to produce 3 Br- and 3 N2.
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Why don't atoms collapse if they are mostly empty space?
Atoms don't even collapse in a vacuum. Because atoms are completely packed with scattered electrons, they are unable to contract. If the majority of an atom's surface area were empty space.
We could make atoms smaller. There is no empty space within an atom. Atoms are completely filled with widely spaced out electrons, making it difficult for them to contract. Electrons are located in the area termed the electron cloud that surrounds the nucleus of an atom. The set of primary particles that comprise an atom includes many other particles than the electron. Like other elementary particles, electrons can collide with other particles and, when they are diffracted, exhibit wavelike characteristics.
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in the following images, a blue circle represents an atom of one type of element, and a red square represents an atom of a second type of element. determine which of them represent a pure substance, a homogenous mixture, and a heterogeneous mixture.
In the given images structure 1 represents pure element, structure 2 represents heterogenous and structure 3 represents homogenous structure, respectively.
A Pure element is a structure that is made up of only one kind of particle. Homogenous mixture is a mixture that contain same proportion of its components while heterogenous mixture is a mixture that contains unequal proportion of the component.
Given, blue circle represents an atom and red square represents an atom of second type of element.
In the structure given in 1st, half part of sphere contains blue atom and another half contain another type of atom(red). Thus, the structure is an example of pure element.
In the 2nd structure, Blue and Red elements are mixed together in an unequal amount in a sample. Thus, it is an example of heterogenous structure.
In 3rd structure, number of two type of atoms are same. Thus, it is an example of homogenous structure.
Therefore, the provided structure represents pure element, heterogenous structure, and homogenous structure, respectively.
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Consider the previous question again. If 3 moles of MgCl2 are put in a Liter of water then which of the following statements is TRUE? (Mark all that are TRUE...there may be more than one).a. The solution would have a molarity of 1 b. The solution would have a molarity of 3 c. The solution would have an osmolarity of 3 d. The solution would have an osmolarity of 6 e. The solution would have a molarity of 6 f. The solution would have a molarity of 1.5 g. The solution would have an osmolarity of 1.5 h. The solution would have an osmolarity of 9
If 3 moles of MgCl₂ are put in the liter of the water then the true statement are :
d) True
e) True
f) True
g) True
h) True
The true statements are given below if the 3 moles of MgCl₂ are put in the liter of the water :
d) The solution would have an osmolarity of 6
e) The solution would have a molarity of 6
f) The solution would have a molarity of 1.5
g) The solution would have an osmolarity of 1.5
h) The solution would have an osmolarity of 9
The molarity can be calculated by the following formula :
Molarity = moles / volumes in L
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elect the incorrect statements(s).
1. Although ice, water and water vapour all look different and display different physical properties, they are
chemically the same.
2. During burning of a candle, both physical and chemical changes take place.
3. Both water and cooking oil are liquid but their chemical characteristics are different. They differ in odour
and inflammability.
4. It is the physical property of oil that makes it different from water.
(a) 1 and 2 (b) 2 and 3
(c) 1, 2 and 3 (d) Only 4
The incorrect statements are option (a) 1 and 2 :
1. Although ice, water and water vapor all look different and display different physical properties, they are chemically the same.
2. During burning of a candle, both physical and chemical changes take place.
What is physical properties?Although ice, water and water vapor all look different and display different physical properties, they are chemically the same. This statement is incorrect. Ice, water, and water vapor are all forms of water, but they are not chemically the same. They have different physical properties such as state, shape, and temperature.
Therefore, During burning of a candle, both physical and chemical changes take place. This statement is incorrect. Burning of a candle is a chemical change, where the wax is broken down into smaller molecules and is converted into carbon dioxide, water vapor and other gases.
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