Multiple choice

Assertion: But-1-yne reacts with Tollen’s reagent to give white precipitate of silver but-1-ynide, but but-2-yne does not react. Reason: But-1-yne has acidic hydrogen but but-2-yne does not.

  1. Both A and R are true and R is the correct explanation of A.

  2. Both A and R are true but R is NOT the correct explanation of A.

  3. A is true but R is false.

  4. A is false but R is true.

  5. Both A and R are false.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

CH3−CH2−C=CH + [Ag(NH3)2]+OH- → CH3−CH2−C=C-Ag+ + 2NH3 + H2O But-1-yne reacts with Tollen’s reagent to give white precipitate of silver but-1-ynide because but-1-yne has acidic hydrogen, while but-2-yne does not react with Tollen’s reagent due to absence of acidic hydrogen. Thus, this option is correct.

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