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Question

Equivalent weight of a bivalent metal is $$37.2$$. The molecular weight of its chloride is


A
216.6
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B
148.8
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C
145.4
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D
172.8
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Solution

The correct option is C 145.4
 $$Equivalent \: weight \: of \: M^{2+} = 37.2$$
$$Thus, \: molar \: mass \: of \: M^{2+} =37.2\times 2=74.4$$ 
(Mol. wt. $$=$$ Eq. wt./valency)
$$Thus, \: molar \: mass \: of \: MCl_2=74.4 + 71 = 145.5$$

Chemistry

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