The number of periods and groups in the periodic table are__________.

(a)

6,16

(b)

7,17

(c)

8,18

(d)

7,18

_____ group contains the member of halogen family.

(a)

17^th

(b)

15^th

(c)

18^th

(d)

16^th

Chemical formula of rust is ________.

(a)

FeO.xH₂O

(b)

FeO₄.xH₂O

(c)

Fe₂O₃.xH₂O

(d)

FeO

The process of coating the surface of metal with a thin layer of zinc is called______.

(a)

painting

(b)

thinning

(c)

galvanization

(d)

electroplating

Neon shows zero electron affinity due to _____.

(a)

stable arrangement of neutrons

(b)

stable configuration of electrons

(c)

reduced size

(d)

increased density