Mark the incorrect statement about alkyl halide:
Correct answer: C. Alkyl halides are soluble in water
- A. Boiling points of haloalkanes are greater than that of alkanes
- B. Order of decreasing boiling points in alkyl halides is R - I > R - Br > R - CI > R - F
- C. Alkyl halides are soluble in water
- D. Primary alkyl halides can be prepared by reaction of PCI5 or SOCl2 with alcohols but not aryl halide
Explanation
Alkyl halides are not soluble in water. They are only slightly soluble in water, at best. This is because the polar carbon-halogen bond in alkyl halides is not strong enough to overcome the strong hydrogen bonding forces between water molecules.The solubility of alkyl halides in water decreases as the length of the alkyl group increases. This is because the alkyl group is more non-polar than the carbon-halogen bond, and so the alkyl halide molecules become more hydrophobic as the alkyl group gets longer. Therefore, option c is correct.
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About Alkyl Halides
Alkyl halides are named and related to their carbon-halogen structure, polarity and reactivity. The key reactions are nucleophilic substitution by SN1 and SN2 mechanisms and elimination by E1 and E2 mechanisms, including how substrate structure, nucleophile, base, solvent and temperature influence substitution versus elimination.
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458 free Alkyl Halides MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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