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Question

Subscripts in the chemical formula A2B3 denotes:

(i) 2 atoms of A combine with 3 atoms of B to form A2B3

(ii) The subscript 2 denotes that valency of A is 2.



A

 is true and B is false.

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B

A is false and B is true.

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C

Both A and B are true

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D

Both A and B are false

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Solution

The correct option is B

 is true and B is false.


The formula A2B3 denotes that 2 atoms of A have combined with 3 atoms of B. The subscripts also represent the valencies of opposite atoms.

The valency of A is 3 and that of B is 2 here in this case. Because when we write the formula we cross multiply the valencies. 


Chemistry

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