Asked in FBISE Chemistry 2022 SLO — Paper 3 2022Moderate

When secondary alcohol reacts with NaOH to produce yellow ppt, it is called

Correct answer: C. Toulen test

  • A. Lucas test
  • B. Benedict test
  • C. Toulen test

Explanation

The iodoform test is a chemical test used to identify the presence of methyl ketones or secondary alcohols containing a methyl group adjacent to a carbonyl group (α-methyl ketones or secondary alcohols) in a given compound.R-CH2-OH+NaOH→ CHI3 (s) + R-COONa + 3H2O

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About Alcohols

Alcohols contain a hydroxyl group attached to a saturated carbon atom and are classified as primary, secondary or tertiary. Their nomenclature, hydrogen bonding, acidity, oxidation, dehydration, reaction with sodium and conversion to haloalkanes are covered, along with the distinction between alcohols and phenols, where the hydroxyl group is attached directly to an aromatic ring.

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