Number of valence electrons in carbon is

(a)

2

(b)

3

(c)

4

(d)

5

Atoms having 1, 2 or 3 electrons in its valence shell will readily form_____________

(a)

cation

(b)

anion

(c)

Calcium

(d)

electron

Bond formed between a metal and non-metal atom is usually____________

(a)

ionic bond

(b)

covalent bond

(c)

co-ordinate bond

(d)

metallic bond

Covalent bond is formed by_________

(a)

transfer of electrons

(b)

sharing of electrons

(c)

sharing a pair of electrons

(d)

transfer of electrons

Elements with stable electronic configurations have eight electrons in their valence shell. They are__________

(a)

Halogens

(b)

Metals

(c)

Noble gases

(d)

non metals

Which of the following atom can exist independently?

(a)

Magnesium

(b)

Chlorine

(c)

Hydrogen

(d)

Neon

___________compounds are highly brittle

(a)

Ionic

(b)

Covalent

(c)

Co-ordinate covalent

(d)

Covalent

_______________is an example of a covalent compound having high melting point

(a)

Magnesium oxide

(b)

Silicon carbide

(c)

Ammonia

(d)

All the above

Which of the following compound(s) possesses high melting point?

(a)

NaCI

(b)

MgCI₂

(c)

CCl₄

(d)

Both a & b

Statement (A) Ionic compounds do not conduct electricity in solid state.
Reason (B) The ions in ionic compounds are tightly held together by strong electrostatic force of attraction and they can not move freely

(a)

B explains A

(b)

B do not explain A

(c)

B is wrong A

(d)

A is right B is wrong