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Question

Assertion :The equivalent weight of an element is variable.
Reason: The valency of an element is variable.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
most of the element in modern periodic table have variable oxidation state, for example Fe, etc
Equivalent weight is define as
equivalent weight = molecularweightvalancy
hence, equivalent weight and valency of an element both are variable.

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