Question

2. Indicate which of the following molecules has four shared electrons.

a. O2

b. CO

c. HI

d. N2

e. Cl2

3. Which statements correctly describe a polar covalent bond?

I. Electrons are shared but not equally by the two atoms.

II. One atom has a small negative charge, and the other atom has a small positive charge. The III. bond dipole is zero.

IV. One or more electrons are transferred from one atom to a second atom.

a.I and II only

b.II and III only

c. III and IV only

d. I and III only

e. I and IV only

4. Which of the following bonds is most polar?

a.B⎯H

b.N⎯H

c.P⎯H

d. Al⎯H

e. C⎯H

Answer 1

Question 2

Explanation-

Compounds with polar covalent bonds have electrons that are shared unequally between the bonded atoms. ... The asymmetrical charge distribution in a polar substance produces a dipole moment, which is the product of the partial charges on the bonded atoms and the distance between them.