Question

$25 \,g$ of $MCl _{4}$ contains $0.5$ mole chlorine then its molecular weight is

• A. $100\, g \,mol ^{-1}$
• B. $200\, g\, mol ^{-1}$
• C. $150 \,g \,mol ^{-1}$
• D. $400 \,g \,mol ^{-1}$

Answer 1

Answer: (B)

$0.5$ mole chlorine is present in $25 \,g$ of $M C l_{4}$ mole chlorine will be present in $50 g$ of $MCl _{4}$
But $MCl _{4}$ contain $4$ moles of chlorine then, molecular weight of $M C l_{4}=4 \times 50=200\, g\,mol ^{-1}$