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Question

The equivalent mass of a certain bivalent metal is 25 g. The gram molar mass of its anhydrous chloride is:

A
51 g
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B
121 g
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C
79 g
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D
34 g
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Solution

The correct option is B 121 g
Let the metal that reacts be M
The metal is bivalent, the gram molar mass =2×25=50 g
A bivalent metal forms a chloride that has the formula MCl2
Molar mass of the metal chloride =50+(2×35.5)=121 g

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