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Q.

An element 'P' which belongs to 13th  group of periodic table and another element 'Q' belongs to 16th group. The formula of the compound formed if they react with each other is

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a

P2Q

b

P2Q3

c

PQ3

d

P3Q2

answer is D.

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Detailed Solution

‘P’ belongs to  13th group so valency of P = 3
 ‘Q’ belongs to 16th  group so valency of  Q = 2
Criss cross method

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