Find the number of compounds from the list below that will be oxidised by Tollens reagent (Ammonical silver nitrate solution)
$H_{3} C - C H O H_{3} C - O ∥ C - {C H}_{3} H_{3} C | O H - O ∥ C - {C H}_{3} H_{3} C - {C H}_{2} C \equiv C H H_{3} C - C \equiv C - {C H}_{3} F r u c t o s e$

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Solution

$C H_{3} - C H O$
$C H_{3} - C H_{2} - C \equiv C H$
$F r u c t o s e$

Only these three give positive Tollen's test.

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