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Percentage Composition

One mole of c...

Question

One mole of chlorine combines with certain mass of a metal giving 111 g of its chloride. The same mass of metal can displace 2 g of hydrogen from an acid. The atomic mass of the metal is :

A

40

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B

20

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C

80

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D

none of these

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Solution

The correct option is B 40
Let, metal chloride is $M C l_{x}$ .

Mass of ${C l}_{2} = 1 m o l = 71 g$

So, compound is $M C l_{2}$ .

mass of metal chloride $= 111 g$

mass of metal $= 111 - 71 = 40 g$

Atomic mass of metal $= 40$ g.

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