MEDIUM
9th West Bengal Board
IMPORTANT
Earn 100

A sample of oxygen gas weighs 8 g. The number of oxygen atoms present is:

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Important Questions on Atomic Structure; Physical and Chemical Properties of Matter

EASY
9th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 9>Chapter 4 - Atomic Structure; Physical and Chemical Properties of Matter>EXERCISE>Q 6

The number of moles of CuSO4 present in 16 g of the sample are:

[Cu = 64 g, S = 32 g, O = 16 g]

MEDIUM
9th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 9>Chapter 4 - Atomic Structure; Physical and Chemical Properties of Matter>EXERCISE>Q 7
Maximum number of molecules are present in:
EASY
9th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 9>Chapter 4 - Atomic Structure; Physical and Chemical Properties of Matter>EXERCISE>Q 8
Weight of 2 moles of ammonia is:
EASY
9th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 9>Chapter 4 - Atomic Structure; Physical and Chemical Properties of Matter>EXERCISE>Q 9
Maximum number of elementary particles are present in:
MEDIUM
9th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 9>Chapter 4 - Atomic Structure; Physical and Chemical Properties of Matter>EXERCISE>Q 10
One mole of oxygen gas at STP is equal to:
MEDIUM
9th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 9>Chapter 4 - Atomic Structure; Physical and Chemical Properties of Matter>EXERCISE>Q 11
Which of the following pairs have the same number of atoms?
MEDIUM
9th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 9>Chapter 4 - Atomic Structure; Physical and Chemical Properties of Matter>EXERCISE>Q 12
Weight of 44.8 litre of a gas at STP is 56 g. The gas is:
EASY
9th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 9>Chapter 4 - Atomic Structure; Physical and Chemical Properties of Matter>EXERCISE>Q A
Molar volume of a gas at STP is _____ litres.