Laws of Chemical Combination, Class 11 Chemistry NCERT Solutions

1. There will be total 15  MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying.

1. Which law is also known as Law of constant composition?

Law of multiple proportions

Avogadro's law

Law of conservation of mass

Law of definite proportions

Your comments:

Question 1 of 15

2. According to Dalton's atomic theory chemical reactions involve:

destruction of atoms

reorganisation of nuclei

reorganisation of atoms

construction of atoms

Your comments:

Question 2 of 15

3. 100mL of gaseous hydrogen combines with 50mL of gaseous oxygen to give 100mL of water vapours. This can be explained on the basis of:

Law of definite proportions

Gay Lussac's law

Law of multiple proportions

Avogadro law

Your comments:

Question 3 of 15

4. According to the Avogadro's law, equal volumes of gases at the same temperature and pressure should contain:

Same potential energy

Same molartity

Equal number of molecules

Same kinetic energy

Your comments:

Question 4 of 15

5. The distinction between atoms and molecules was made by:

Dalton's atomic theory

Avogadro law

Laws of chemical combination

Gay lussacs law

Your comments:

Question 5 of 15

6. Law of definite proportions is given by:

Antoine Lavoisier

Joseph Proust

Avogadro

John Dalton

Your comments:

Question 6 of 15

7. According to Avogadro's law at the same temperature and pressure:

Equal volumes of gases contain equal number of molecules.

Matter can neither be created nor destroyed.

Compounds are formed when atoms of different elements combine in a fixed ratio.

Matter consists of indivisible atoms.

Your comments:

Question 7 of 15

8. Law of constant composition does not hold good for:

Endothermic compounds

Non-stoichiometric compounds

Stoichiometric compounds

Exothermic compounds

Your comments:

Question 8 of 15

9. Laws of chemical combinations can be explained on the basis of:

Avogadro law

Gay lussacs law

Dalton's atomic theory

Mole concept

Your comments:

Question 9 of 15

10. What is incorrect about the Law of conservation of mass?

A given compound always conatains exactly the same proportion of elements by weight

Mass of reactants is equal to the mass of products

Matter can neither be created nor destroyed

It was given by Antoine Lavoiser

Your comments:

Question 10 of 15

11. A statement which is not a part of Dalton's atomic theory is:

Matter is made of atoms.

All atoms of a given element are identical.

Atoms are composed of sub-atomic particles called electron, proton and neutron.

Atoms of different elements have different mass and different properties.

Your comments:

Question 11 of 15

12. Natural sample of cupric carbonate contains 51.35% of copper, 9.74% of oxygen and 38.91% of carbon. Synthetic sample of the compound will contain:

51.35% of copper, 19.74% of oxygen and 30.91% of carbon.

51.35% of Copper, 9.74% of oxygen and 38.91% of carbon

9.74% of copper, 38.91% of oxygen and 9.74% of carbon

9.74% copper, 9.74% of oxygen and 38.91% of carbon

Your comments:

Question 12 of 15

13. A compound prepared by any method contains the same elements in the fixed ratio by mass. The given statement is known as:

Law of definite Proportions

Law of reciprocal Proportions

Law of conservation of mass

Law of multiple Proportions

Your comments:

Question 13 of 15

14. At what conditions Gay Lussac's law of gaseous volumes is considered?

Same pressure only

Same temperature only

Same amount of all the reactants and products only.

Same temperature and pressure.

Your comments:

Question 14 of 15

15. Law of conservation of mass was given by:

Avogadro

Antoine Lavoisier

John Dalton

Joseph Proust

Your comments:

Question 15 of 15

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