Test Yourself : Chapter 25 Polarity of bond and molecule

Which of the following covalent bonds is the most polar?

• A. H–F
• B. F–F
• C. C–F
• D. C–H

Which of the following statements concerning the electronegativity of the main group elements is correct?

• A. Potassium is more electronegative than sodium.
• B. Chlorine is more electronegative than iodine.
• C. Oxygen is less electronegative than carbon.
• D. Silicon is less electronegative than magnesium.

Which of the following statements concerning BF₃ are correct?

(1) Its molecules are trigonal planar in shape.

(2) It contains non-polar bonds in its molecules.

(3) It consists of non-polar molecules.

• A. (1) and (2) only
• B. (1) and (3) only
• C. (2) and (3) only
• D. (1), (2) and (3)

Which of the following molecules is/are polar?

(1) OF₂

(2) SiCl₄

(3) PCl₅

• A. (1) only
• B. (2) only
• C. (1) and (3) only
• D. (2) and (3) only

Which of the following molecules are non-polar?

(1) NCl₃

(2) CS₂

(3) SF₆

• A. (1) and (2) only
• B. (1) and (3) only
• C. (2) and (3) only
• D. (1), (2) and (3)

Which of the following statements about CCl₄ and CH₂Br₂ are correct?

(1) Both CCl₄ and CH₂Br₂ show deflection towards a charged rod.

(2) Their molecules share a similar shape.

(3) The C–Br covalent bonds in the CH₂Br₂ molecule are less polar than the C–Cl covalent bonds in the CCl₄ molecule.

• A. (1) and (2) only
• B. (1) and (3) only
• C. (2) and (3) only
• D. (1), (2) and (3)

Which of the following statements concerning SiCl₄ are correct?

(1) It shares a similar molecular shape with CH₄.

(2) It contains polar Si–Cl bonds in its molecules.

(3) The Si–Cl bonds are arranged symmetrically in its molecules.

• A. (1) and (2) only
• B. (1) and (3) only
• C. (2) and (3) only
• D. (1), (2) and (3)

Which of the following jets of liquids can be deflected by a charged rod?

(1) Dibromomethane

(2) Tetrachloromethane

(3) Ethanol-water mixture

• A. (1) and (2) only
• B. (1) and (3) only
• C. (2) and (3) only
• D. (1), (2) and (3)