Question

4) The molecular formula of a compound is P2Q, Q reacts with carbon to form CQ2 the
valency of P is​

Answer 1

Given info : the molecular formula of a compound is P₂Q, here when Q reacts with carbon, Its form CQ₂

To find : the valency of P is .............

solution : we know, electronic configuration of C is 1s² , 2s² , 2p²

so, there are four electrons in the valence shell of carbon atom. therefore, valency of carbon atom is 4.

 now if C and Q forms CQ₂ it means, four electrons of carbon transfer to Q. so, charge of 2Q = - 4 then charge on each Q is -2.

  now let's find the charge on P so that we can find the valency of it.

let charge on P is x.

 2x + (-2) = 0 ⇒ x = 1

there charge on P is + 1 it means P has tendency to remove an electron from it outermost orbit.

   therefore the valency of P is 1.  

Answer 2

Question ⬇

4) The molecular formula of a compound is P2Q, Q reacts with carbon to form CQ2 the

valency of P is​?

Answer:-  ⬇

                electronic configuration of C is 1s² , 2s² , 2p²

        now let's find the charge on P so that we can find the valency of it.

let charge on P is x.

2x + (-2) = 0 ⇒ x = 1

therefore the valency of P is 1.  

thank you