Laws of Chemical Combination NEET Questions

Physical Chemistry - Some Basic Concepts of Chemistry

Laws of Chemical Combination MCQ Questions


13.
Which law states that a given compound always contains its component elements in fixed ratio by mass?
A.
Law of Definite Proportions
B.
Law of Conservation of Mass
C.
Law of Multiple Proportions
D.
Avogadro’s Law
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ANSWER :
A. Law of Definite Proportions
14.
Which law states that a given compound always contains exactly the same proportion of elements by weight?

NEET - 2016

A.
Law of conservation of mass
B.
Law of definite proportions
C.
Law of multiple proportions
D.
Gay-Lussac's law
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ANSWER :
B. Law of definite proportions
15.
The Law of Conservation of Mass is applicable to which type of reaction?
A.
Chemical reactions only
B.
Only combustion reactions
C.
Only physical changes
D.
All types of reactions
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ANSWER :
D. All types of reactions
16.
Which scientist first gave the concept of chemical combination?
A.
Antoine Lavoisier
B.
Joseph Proust
C.
John Dalton
D.
Robert Boyle
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ANSWER :
B. Joseph Proust
17.
The ratio of hydrogen to oxygen in H2O2 is an example of which law?
A.
Law of Reciprocal Proportions
B.
Law of Multiple Proportions
C.
Law of Definite Proportions
D.
Avogadro’s Law
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ANSWER :
B. Law of Multiple Proportions
18.
According to the Law of Multiple Proportions, the ratio of masses of one element combining with a fixed mass of another is:
A.
A simple fraction
B.
A decimal number
C.
A whole number
D.
An irrational number
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ANSWER :
C. A whole number