11-2 L of CH 4 and 22-4 L of C 2 H 6 are mixed at STP- Choose the correct statements-A- Vapour density of the mixture is 12-67B- Average molecular weight will be less than 16C- Average molecular weight will be greater than 16 and less than 30D- Average molecular weight will be greater than 30

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Standard XII

Chemistry

Mole Concept

11.2 L of CH ...

Question

$11.2 L$ of $C H_{4}$ and $22.4 L$ of $C_{2} H_{6}$ are mixed at STP. Choose the correct statement(s).

Vapour density of the mixture is 12.67

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Average molecular weight will be less than 16

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Average molecular weight will be greater than 16 and less than 30

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Average molecular weight will be greater than 30

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Solution

The correct options are
A Vapour density of the mixture is 12.67
C Average molecular weight will be greater than 16 and less than 30
Average molecular weight $= \frac{1}{3} \times 16 + \frac{2}{3} \times 30 = 5.33 + 20 = 25.33$ Average molecular weight is greater than 16 and less than 30.
$Vapour density = \frac{Molecular weight}{2} = 12.67$

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11.2 L of CH4 and 22.4 L of C2H6 are mixed at STP. Choose the correct statement(s).

The correct options are A Vapour density of the mixture is 12.67 C Average molecular weight will be greater than 16 and less than 30Average molecular weight =13×16+23×30=5.33+20=25.33 Average molecular weight is greater than 16 and less than 30. Vapour density=Molecular weight2=12.67

$11.2 L$ of $C H_{4}$ and $22.4 L$ of $C_{2} H_{6}$ are mixed at STP. Choose the correct statement(s).