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Subjects

Chemistry

Laws of chemical combination

In this Class 11 Chemistry topic from “Some Basic Concepts of Chemistry,” students learn the fundamental laws that describe how elements combine to form compounds. They explore the law of conservation of mass, definite proportions, multiple proportions, and related ideas about combining volumes and particles. The topic helps students interpret chemical formulas, compare compound compositions, understand the basis of atomic theory, and apply these principles while balancing equations and solving introductory chemical calculations.

Easy · Level 13 · 25 questions

Practice questions

01What is the main purpose of laws of chemical combination?

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02Which quantity is compared in the law of conservation of mass?

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03What is the correct meaning of the law of conservation of mass?

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04Which vessel is better to show conservation of mass experimentally?

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05Why can measured mass be lower if gas evolves in an open vessel?

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06To what does the law of definite proportions apply?

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07By what other name is the law of definite proportions known?

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08Why is a mixture not a good example of the law of definite proportions?

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09In which situation does the law of multiple proportions apply?

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10In the law of multiple proportions masses are in what type of ratio?

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11Which pair is a correct example for the law of multiple proportions?

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12The law of gaseous volumes is related to what?

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13How are gas volumes related in Gay-Lussac's law?

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14The law of reciprocal proportions is generally related to how many elements?

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15In the law of reciprocal proportions two elements combine separately with what?

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16Which scientist is associated with the law of definite proportions?

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17Which scientist is associated with the law of gaseous volumes?

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18Which scientist is associated with the law of reciprocal proportions?

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19Which law gives strong support to atomic theory?

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20In which law is the total mass on the reactant side equal to the total mass on the product side?

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21Which law talks about only one fixed composition of a pure compound?

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22In which law are mass relations of several compounds compared?

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23In which type of law does the unit gram most commonly give a clue?

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24In which law does the unit litre most commonly give a clue?

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25Pure water obtained from different sources always contains hydrogen and oxygen in the same mass ratio. Which law does this illustrate?

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