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Iodoalkanes can be obtained by heating alcohols with potassium iodide in __________

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Iodoalkanes can be obtained by heating alcohols with potassium iodide in __________

(a) hypophosphrus acid

(b) phosphorus acid

(c) phosphoric acid

(d) hypophosphoric acid

I had been asked this question during an online interview.

I'd like to ask this question from Methods of Preparation of Haloalkanes in chapter Haloalkanes and Haloarenes of Chemistry – Class 12

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Correct option is (c) phosphoric acid

The explanation is: When alcohols are heated with potassium or sodium iodide in 95% phosphoric acid (H3PO4), iodoalkanes are generated.

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