10-minute Quiz : Chapter 27 Structure and properties of ice

Consider the following statements and choose the best answer:

1st statement

Snowflakes are hexagonal in shape.

2nd statement

The oxygen atoms in the structure of ice are arranged in a hexagonal shape.

• A. Both statements are true and the 2nd statement is a correct explanation of the 1st statement.

• B. Both statements are true but the 2nd statement is NOT a correct explanation of the 1st statement.

• C. The 1st statement is false but the 2nd statement is true.

• D. Both statements are false.

Which of the following is NOT a molecular crystal?

• A. Ice
• B. Dry ice
• C. Quartz
• D. White phosphorus

Which of the following would occur when ice is melting?

(1) Its open structure collapses.

(2) Its density increases.

(3) The covalent bonds in its structure are broken.

• A. (1) and (2) only

• B. (1) and (3) only

• C. (2) and (3) only

• D. (1), (2) and (3)

Consider the four substances. Which of the substances is likely a molecular crystal under room conditions?

• A. W

• B. X

• C. Y

• D. Z

Which of the following types of electrostatic attraction are present in the structure of ice?

(1) Intermolecular hydrogen bonding

(2) Intramolecular hydrogen bonding

(3) Van der Waals’ forces

• 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 the structure of ice are INCORRECT?

(1) Water molecules are arranged regularly to from a giant covalent structure.

(2) Water molecules are arranged in a hexagonal shape.

(3) Hydrogen bonds form and are broken continuously between water 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 statements about ice and iodine is/are correct?

(1) Both of their molecules are polar.

(2) Both of them are molecular crystals.

(3) Both of them have open structures.

• A. (1) only

• B. (2) only

• C. (1) and (3) only

• D. (2) and (3) only

The diagram shows the structure of a substance. Which of the following may this substance be?

• A. Iodine

• B. Diamond

• C. Dry ice

• D. Hydrogen

Consider the following statements and choose the best answer:

1st statement

When ice melts, heat is given out.

2nd statement

When ice melts, some hydrogen bonds between water molecules are broken.

• A. Both statements are true and the 2nd statement is a correct explanation of the 1st statement.

• B. Both statements are true but the 2nd statement is NOT a correct explanation of the 1st statement.

• C. The 1st statement is false but the 2nd statement is true.

• D. Both statements are false.

Which of the following types of attraction is/are present in solid carbon dioxide?

(1) Covalent bonding

(2) Hydrogen bonding

(3) Van der Waals’ forces

• A. (1) only

• B. (2) only

• C. (1) and (3) only

• D. (2) and (3) only