- (a) 6 covalent bonds.
- (b) 7 covalent bonds.
- (c) 8 covalent bonds.
- (d) 9 covalent bonds.
Answer: (b) 7 covalent bonds.
Explanation: Ethane (C2H6) has the following covalent bonds:
- 1 bond between the two carbon atoms
- 3 bonds between each carbon atom and three hydrogen atoms
So, ethane has a total of: 1(C-C bond) + 6 (C-H bonds) = 7 covalent bonds
1(C-C bond)+6(C-H bonds)=7covalent bonds
MCQs Based on the above question
Question 1: Methane (CH4) has:
(a) 3 covalent bonds
(b) 4 covalent bonds
(c) 5 covalent bonds
(d) 6 covalent bonds
Answer: (b) 4 covalent bonds
Explanation: Methane has one carbon atom bonded to four hydrogen atoms, resulting in a total of 4 covalent bonds (4 C-H bonds).
Question 2: Ammonia (NH3) contains:
(a) 2 covalent bonds
(b) 3 covalent bonds
(c) 4 covalent bonds
(d) 5 covalent bonds
Answer: (b) 3 covalent bonds
Explanation: Ammonia has one nitrogen atom bonded to three hydrogen atoms, resulting in a total of 3 covalent bonds (3 N-H bonds).
Question 3: Water (H2O) has:
(a) 2 covalent bonds
(b) 3 covalent bonds
(c) 4 covalent bonds
(d) 5 covalent bonds
Answer: (a) 2 covalent bonds
Explanation: Water has one oxygen atom bonded to two hydrogen atoms, resulting in a total of 2 covalent bonds (2 O-H bonds).
Question 4: Carbon dioxide (CO2) contains:
(a) 2 covalent bonds
(b) 4 covalent bonds
(c) 6 covalent bonds
(d) 8 covalent bonds
Answer: (b) 4 covalent bonds
Explanation: Carbon dioxide has one carbon atom double-bonded to two oxygen atoms, resulting in a total of 4 covalent bonds (2 C=O double bonds).