Class 12 · Chemistry
Haloalkanes and Haloarenes
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ChemistryPlate 35
NeetVellum atlas · fig. chemistry
35
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Three examples from the live 150-question bank. Answers appear after attempting them in practice mode.
Example 1 · difficulty 1/5
At room temperature, which of the following isomeric monochloro derivatives of butane has the highest boiling point?
- A. 1-Chlorobutane
- B. 2-Chloro-2-methylpropane
- C. 2-Chlorobutane
- D. 1-Chloro-2-methylpropane
Example 2 · difficulty 2/5
In the Finkelstein reaction, R–X + NaI → R–I + NaX, the conversion of a chloroalkane or bromoalkane to the corresponding iodoalkane is carried out specifically in dry acetone because:
- A. water dissolves all the salts equally well, keeping the system at equilibrium
- B. ethanol stabilises the iodoalkane product against further reaction
- C. NaI is soluble in acetone while NaCl/NaBr are insoluble and precipitate out, pulling the equilibrium forward
- D. liquid ammonia complexes with Na⁺ and thereby removes the leaving group
Example 3 · difficulty 1/5
Which of the following alkyl bromides undergoes an SN2 reaction with I⁻ in acetone at the fastest rate?
- A. 1-Bromopropane
- B. Bromomethane
- C. 2-Bromopropane
- D. 1-Bromo-2,2-dimethylpropane
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- 3. Re-practiceReturn until the error pattern disappears.
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Attempt questions before rereading, classify each miss, revisit the exposed NCERT concept, then re-practice until the error pattern disappears.