Chemistry

Question 1

1The bond angle in methane is

Hard

A. 109.5° B. 180° C. 104.5° D. 120°

Question 2

2The bond in sodium chloride is

Easy

A. ionic B. covalent C. dative D. metallic

Question 3

3The bond formed when both shared electrons come from one atom, as in NH₄⁺, is

Easy

A. a hydrogen bond B. a dative (coordinate) bond C. an ionic bond D. a metallic bond

Question 4

4A dative (coordinate) bond is formed when

Easy

A. both shared electrons come from one atom B. electrons are transferred C. ions attract D. metals bond

Question 5

5Which molecule has a trigonal planar shape?

Hard

A. BF₃ B. CH₄ C. NH₃ D. H₂O

Question 6

6How many covalent bonds does carbon usually form?

Easy

A. 4 B. 1 C. 2 D. 3

Question 7

7Metallic bonding consists of

Easy

A. positive ions in a sea of delocalised electrons B. hydrogen bonds C. oppositely charged ions D. shared electron pairs

Question 8

8The number of lone pairs on the oxygen atom in water is

Hard

A. 3 B. 0 C. 2 D. 1

Question 9

9Which compound contains both ionic and covalent bonds?

Hard

A. H₂O B. CH₄ C. NH₄Cl D. NaCl

Question 10

10A molecule of chlorine, Cl₂, is held by

Easy

A. a double bond B. an ionic bond C. a single covalent bond D. a metallic bond