EASY
9th CBSE
IMPORTANT
Earn 100

The mass of nitrogen per gram hydrogen in the compound hydrazine is exactly one and half times the mass of nitrogen in the compound ammonia. This fact illustrates the
(a)law of conservation of mass
(b)multiple valency of nitrogen
(c)law of multiple proportions
(d)law of definite proportions

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Important Questions on Periodic Tests
EASY
9th CBSE
IMPORTANT

EASY
9th CBSE
IMPORTANT

MEDIUM
9th CBSE
IMPORTANT

EASY
9th CBSE
IMPORTANT
What is the mass of mole of ?
[Given atomic mass of , atomic mass of ]

EASY
9th CBSE
IMPORTANT

MEDIUM
9th CBSE
IMPORTANT
In which medium, speed of sound is maximum?
(Choose from: Solid/ Liquid/ Gas)

EASY
9th CBSE
IMPORTANT

EASY
9th CBSE
IMPORTANT
A liquid flows easily.
