Class 11 Chemistry · Chapter 13 · Test 1
Halogens Chapter 13
35 MCQ test checks your understanding of the physical properties of the halogens and the trends in their volatility and bond strength
35 questions · 25 min · 35 marks
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Sample questions
The first 5 of 35. Try each one, then tap to see the answer.
Question 1
Which halogen molecule has the strongest bond?
- AF2
- BBr2
- CI2
- DCl2
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Answer: D
Table 13.3 gives bond energies of F2 = 156 and Cl2 = 243 and Br2 = 193 and I2 = 151 kJ/mol so Cl2 is highest.
Question 2
The volatility of the halogens (Group 17) generally _________ as you move down the group (from fluorine to iodine).
- AIncreases
- BDecreases
- CRemains the same
- DFluctuates unpredictably
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Answer: B
Volatility decreases down the group due to increasing molecular mass and stronger London dispersion forces.
Question 3
Which one of the following halogen molecules has strongest oxidizing power?
- ABr2
- BF2
- CI2
- DCl2
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Answer: B
The oxidizing power decreases down the group (F2 > Cl2 > Br2 > I2) and fluorine has the highest.
Question 4
The decreasing thermal stability down the group is primarily due to the:
- AIncreasing electronegativity of the atoms
- BDecreasing bond length between the halogen atoms
- CIncreasing atomic radius leading to a weaker covalent bond
- DIncreasing strength of van der Waals forces
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Answer: C
The larger atomic radius gives poorer orbital overlap and a weaker bond so thermal stability decreases from HF to HI.
Question 5
Which one of the following halides has strongest reducing power?
- AF-
- BCl-
- CBr-
- DI-
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Answer: D
The order of reducing power is I- > Br- > Cl- > F-.
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