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Q.

A compound contains elements X and Y in 1 : 4 mass ratio. If the atomic masses of X and Y are in ratio 1 : 2, then empirical formula will be

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a

XY

b

$X Y_{2}$

c

$X_{2} Y$

d

$X_{4} Y$

answer is B.

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Detailed Solution

Gram atoms ratio=atoms ratio

no of gram atom=mass/mol wt

X	Y
$\frac{m}{M}$	$\frac{4 m}{2 M}$ $= \frac{2 m}{M}$

Therefore, the empirical formula is $X Y_{2}$

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