chemical bonding icse

When two species A and B form an electron-pair bond and A does not provide its electrons for bonding, the bond present between A and B must be

(a) ionic (b) covalent (c) dative (d) Hydrogen

• a

• b

• c

• d

The type of bond formed during the hydration of cation is

(a) ionic

(b) covalent

(c) electrostatic

(d) coordinate bond

• a

• b

• c

• d

Which of the following bonds has the most polar character?

(a) C-O

(b) C-Br

(c) C-S

(d) C-F

• a

• b

• c

• d

Which of the following compounds has electrovalent linkage?

(a) CH₃Cl

(b) NaCl

(c) CH₄

(d) Cl₂

• a

• b

• c

• d

CCl₄ is insoluble in water because

(a) CCl₄ is nonpolar and water is polar

(b) water is nonpolar and CCl₄ is polar

(c) water and CCl₄ are both polar

(d) none

• a

• b

• c

• d

A molecule with triple covalent bonds is

(a) N₂

(b) H₂

(c) F₂

(d) C₂H₄

• a

• b

• c

• d

The nature of bonding in CCl₄ and CaH₂ is

(a) electrovalent in both CCl₄ and CaH₂

(b) covalent in CCl₄ and electrovalent in CaH₂

(c) electrovalent in CCl₄ and covalent in CaH₂

(d) covalent in both CCl₄ and CaH

• a

• b

• c

• d

Each of the following pairs of chemical species will combine. Which of the following combinations is best explained by the coordinate covalent bond?

(a) H₂ + I₂

(b) Mg +O₂

(c) Cl + Cl

(d) H⁺ + H₂O

• a

• b

• c

• d

As compare to ionic compounds, covalent bond has

a. high melting but low boiling point

b. low melting but high boiling point

c. low melting and boiling point

d. high melting and boiling point

• a

• b

• c

• d

Which among the following is not a property of Ionic bond?

a) Losing of electrons

b) Gain of electrons

c) Sharing of electrons

d) Transfer of electrons

• a

• b

• c

• d