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Question

2 g of hydrogen will have same number of molecules as is present in:

A
14 gm of nitrogen
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B
32 gm of SO2
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C
71 gm of chlorine
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D
24 gm of ozone
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Solution

The correct option is C 71 gm of chlorine
No. of molecules in 2g of hydrogen =NA
A) No. of molecules in 14g of nitrogen =14×NA28=0.5NA
B) No. of molecules in 32g of SO2 =32×NA64=0.5NA
C) No. of molecules in 71g of Cl2 =NA
D) No. of molecules in 24g of ozone =24×NA48=0.5NA
Therefore 71g of Cl2 has same no. of molecules as in 2g of hydrogen.

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