EASY
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IMPORTANT
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The law of multiple proportions is not illustrated by which pair of compounds.

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Important Questions on Atoms and Molecules

EASY
NDA & NA EE
IMPORTANT
Chemistry Crash Course NDA & NA EE>Chapter 3 - Atoms and Molecules>Exercise 1>Q 30
Which of the following compounds confirm the law of multiple proportion?
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NDA & NA EE
IMPORTANT
Chemistry Crash Course NDA & NA EE>Chapter 3 - Atoms and Molecules>Exercise 1>Q 31
One part of an element A combines with two parts of another element B. Six parts of the element C combines with four parts of the element B. If A and C combined together the ratio of their weights will be governed by.
EASY
NDA & NA EE
IMPORTANT
Chemistry Crash Course NDA & NA EE>Chapter 3 - Atoms and Molecules>Exercise 1>Q 32
8g of oxygen combine with 1g of hydrogen and 20g of calcium therefore, when calcium combines with hydrogen it must combine in the ratio of 20:1. This statement confirms to the law of
EASY
NDA & NA EE
IMPORTANT
Chemistry Crash Course NDA & NA EE>Chapter 3 - Atoms and Molecules>Exercise 1>Q 33
Which of the following reactions is not correct according to the law of conservation of mass?
EASY
NDA & NA EE
IMPORTANT
Chemistry Crash Course NDA & NA EE>Chapter 3 - Atoms and Molecules>Exercise 1>Q 34

Consider the following laws:

  1. Law of conservation of mass
  2. Law of definite proportions
  3. Law of multiple proportions

Which of these govern(s) the quantitative aspects of chemical changes?

EASY
NDA & NA EE
IMPORTANT
Chemistry Crash Course NDA & NA EE>Chapter 3 - Atoms and Molecules>Exercise 1>Q 36

Ammonia NH3 obtained from different sources always has same proportion by mass of nitrogen and hydrogen. It proves the validity the law of:

MEDIUM
NDA & NA EE
IMPORTANT
Chemistry Crash Course NDA & NA EE>Chapter 3 - Atoms and Molecules>Exercise 1>Q 37
The law of conservation of mass is not correct for:
MEDIUM
NDA & NA EE
IMPORTANT
Chemistry Crash Course NDA & NA EE>Chapter 3 - Atoms and Molecules>Exercise 1>Q 38
Chemical equation is balanced, according to the law of: