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Question

8g of a metal hydroxide on heating produces 5g of metal oxide. If the atomic mass of the metal is 7, the formula of its chloride is ?



Your Answer
A

MCl3

Your Answer
B

MCl2

Correct Answer
C

MCl

Your Answer
D

None of these


Solution

The correct option is C

MCl


Mass of hydroxideEquiv.mass of hydroxide=Mass of oxideEquiv.mass of oxide
or 8EM+EEOH(=8EM+17)
=5EM+EO(=5EM+8)EM=7
Valency=Atomic massEquiv.mass=77=1;
Hence metal chloride = MCl

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