Chemistry Grade 11 Unit 2 MCQ with explanation
#Target Grade #11 #12

1. Which compound contains a coordinate covalent bond?
A. O₂
B. NH₄⁺
C. CO₂
D. NaCl

2. Which molecule is polar?
A. CCl₄
B. CO₂
C. NH₃
D. CH₄

3. Which compound has both ionic and covalent bonds?
A. MgO
B. CH₃OH
C. KNO₃
D. Cl₂

4. Which molecule has a linear geometry?
A. H₂O
B. CO₂
C. NH₃
D. CH₄

5. What is the bond order in O₂⁺?
A. 2.5
B. 3.0
C. 1.5
D. 2.0

Answers and Explanations:

1. Answer: B. NH₄⁺
Explanation: NH₄⁺ has a coordinate covalent bond. This bond occurs when one atom provides both electrons for the shared pair, in this case, from NH₃ to H⁺.

2. Answer: C. NH₃

3. Answer: C. KNO₃
Explanation: KNO₃ contains ionic bonds between the K⁺ cation and the NO₃⁻ anion. Within the NO₃⁻ anion, covalent bonds exist between the nitrogen and oxygen atoms.

4. Answer: B. CO₂
Explanation: CO₂ is linear due to sp hybridization of the central carbon atom. Each carbon atom is double bonded to the Oxygen atoms.

5. Answer: A. 2.5

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