Question

Q-1 An element A forms an oxideA2O5.

(i) What is the valency of element A?

(ii) What will be the formula of chloride of A?



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Answer 1

valency of A is 5.

ACl5

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Answer 2

Answer:

valency of A2O5 is +5

ACl5 is the formula of chloride of A

Explanation:

Given,

(1)  An element A forms an oxide A2O5

in which the valency of element A is calculated as follows

As we know that the oxidation state of the oxygen is -2

then  2(A)+5(-2)=0

         2A=10

            A=5

Therefore the valency of element A is +5

(2) The formula of chloride of A will be ACl5