Question

what is the valency of: a) fluorine in CaF2 b) sulphur in SF6 c) phosphorous in PH3 d) carbon in CH4 e) nitrogen in the following compound​ : a)N2O3 b)N2O5 c)NO2 d)NO

Answer 1

Answer:

a)1

b)2

c)3

d)5

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Answer 2

Answer:

(i) Fluorine in CaF₂➡ (+2)+2x=0

2x=-2

⇒x=-2/2

⇒x=-1

The valency of Fluorine in CaF₂ is '-1'.

(ii) Sulphur in SF₁-x+6(-1)=0

→X-6=0 ⇒x=6

The valency of Sulphur in SF6 is '6'.

(iii) Phosphorus in PH3+x+3(1)=0

⇒x+3=0

→ X=-3

..The valency of Phosphorus in PH3 is '-3'.

(iv)Carbon in CH4+x+4(1)=0

→x+4=0

⇒ X=-4

::The valency of Carbon in CH4 is '-4'.

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