Chemical Bonding Chemistry

In PO ^3– ion, the formal charge on each oxygen atom and P—O bond order respectively are

(a) –0.75, 1.25

(b) –0.75, 1.0

(c) –0.75, 0.6

(d) –3, 1.25

In PO ^3– ion, the formal charge on each oxygen atom and P—O bond order respectively are

(a) –0.75, 1.25

(b) –0.75, 1.0

(c) –0.75, 0.6

(d) –3, 1.25

Among LiCl, BeCl₂, BCl₃ and CC_l4, the covalent bond character follows the order

(a) BeCl₂ > BCl₃ > CCl₄ < LiCl

(b) BeCl₂ < BCl₃ < CCl₄ < LiCl

(c) LiCl < BeCl₂ < BCl₃ < CCl₄

(d) LiCl > BeCl₂ > BCl₃ > CCl₄

Among the following, which compound will show the highest lattice energy?

(a) KF

(b) NaF

(c) CsF

(d) RbF

Which of the following, set of molecules will have zero dipole moment?

(a) Ammonia, beryllium difluoride, water, 1, 4-dichlorobenzene

(b) Boron trifluoride, hydrogen fluoride, carbon dioxide, 1, 3-dichlorobenzene

(c) Nitrogen trifluoride, beryllium difluoride, water, 1, 3-dichlorobenzene

(d) Boron trifluoride, beryllium difluoride, carbon dioxide, 1, 4-dichlorobenzene

Which of the following molecules has the maximum dipole moment?

(a) CO₂

(b) CH₄

(c) NH₃

(d) NF₃

The species, having bond angles of 120° is

(a) ClF₃

(b) NCl₃

(c) BCl₃

(d) PH₃

The correct order of increasing bond length of C – H, C – O, C – C and C =C is

(a) C – H < C =C < C – O < C – C

(b) C – C < C =C < C – O < C – H

(c) C – O < C – H < C – C < C =C

(d) C – H < C – O < C – C < C =C

The correct order of C – O bond length among CO, CO₃^2–, CO₂ is

(a) CO < CO₃ ^2- < CO₂

(b) CO₃^2- < CO₂ < CO

(c) CO < CO₂ < CO₃ ^2–

(d) CO₂ < CO₃ ^2– < CO

The correct order in which the O – O bond length increases in the following is

(a) O₂ < H₂O₂ < O₃

(b) O₃ < H₂O₂ < O₂

(c) H₂O₂ < O₂ < O₃

(c) O₂ < O₃ < H₂O₂

The correct order of increasing bond angles in the following triatomic species is

(a) NO₂⁺ < NO₂ < NO₂–

(b) NO₂⁺ < NO₂ ^– < NO₂

(c) NO₂ ^– < NO₂⁺ < NO₂

(d) NO₂ ^– < NO₂ < NO₂⁺

The correct sequence of increasing covalent character is represented by

(a)LiCl < NaCl < BeCl₂

(b)BeCl₂ < LiCl < NaCl

(c)NaCl < LiCl < BeCl₂

(d)BeCl₂ < NaCl < LiCl

H₂O is dipolar, whereas BeF₂ is not. It is because

(a) the electronegativity of F is greater than that of O

(b)H₂O involves hydrogen bonding whereas BeF₂is a discrete molecule

(c)H₂O is linear and BeF₂ is angular

(d) H₂O is angular and BeF₂ is linear.

Which of the following molecules does not possess a permanent dipole moment?

(a) CS₂

(b) SO₃

(c) H₂S

(d) SO₂

Which of the following would have a permanent dipole moment?

(a) SiF₄

(b) SF₄

(c) XeF₄

(d) BF₃

Strongest bond is in between

(a) CsF

(b) NaCl

(c) both (a) and (b)

(d) none of the above.

Which of the following bonds will be most polar?

(a) N – Cl

(b) O – F

(c) N – F

(d) N – N

Which of the following species contains three bond pairs and one lone pair around the central atom?

(a) H₂O

(b) BF₃

c) NH₂ ^–

(d) PCl₃