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Question

If Avogadro's number is A0, the number of sulphur atoms present in 200 mL of 1N H2SO4 is


A

A0/2

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B

A0/5

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C

A0

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D

A0/10

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Solution

The correct option is D

A0/10


Avogadro's number = A0
Normality = nt × Molarity
1= 2 × M
M=12molL1
Moles of H2SO4 = 12 × 0.2 = 0.1 moles 21
Normality = 1; Volume = 200 ml (0.2 litre)
Moles of hydrogen = 0.2 moles
Moles of sulphur = 0.1 moles
Atoms = 0.1A0


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