Chemistry

Question 1

1Which compound has covalent bonding?

Easy

A. calcium fluoride B. magnesium oxide C. methane, CH₄ D. sodium chloride

Question 2

2Which of the following compounds is ionic?

Easy

A. CH₄ B. H₂O C. NaCl D. CO₂

Question 3

3The shape of a methane molecule is

Easy

A. bent B. linear C. tetrahedral D. trigonal planar

Question 4

4The compound formed between magnesium and chlorine has the formula

Easy

A. MgCl₂ B. Mg₂Cl C. MgCl D. MgCl₃

Question 5

5Hydrogen bonding explains the high boiling point of

Hard

A. methane B. neon C. hydrogen sulphide D. water

Question 6

6The number of electrons shared in a double covalent bond is

Hard

A. 4 B. 2 C. 8 D. 6

Question 7

7The shape of the methane molecule is

Hard

A. tetrahedral B. trigonal planar C. linear D. bent

Question 8

8The type of hybridisation of carbon in ethene is

Hard

A. sp B. sp² C. sp³ D. dsp²

Question 9

9Ionic compounds generally have

Easy

A. weak forces of attraction B. no charges C. high melting points D. low melting points

Question 10

10Which molecule is non-polar despite having polar bonds?

Hard

A. CO₂ B. H₂O C. NH₃ D. HCl