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Which or how many given compounds give a positive Fehling's or Tollens' test

This type of question, asked 4 times: 29 Jan 2024, 9 Apr 2024, 22 Jan 2025, 24 Jan 2026 S1. All 4 questions below, oldest first.

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  1. Question 1

    29 Jan 2024

    59
    From the compounds given below, number of compounds which give positive Fehling's test is ____ . Benzaldehyde, Acetaldehyde, Acetone, Acetophenone, Methanal, 4-nitrobenzaldehyde, cyclohexane carbaldehyde.

  2. Question 2

    9 Apr 2024

    138
    Which of the following compounds will give silver mirror with ammoniacal silver nitrate? (A) Formic acid (B) Formaldehyde (C) Benzaldehyde (D) Acetone Choose the correct answer from the options given below:

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  3. Question 3

    22 Jan 2025

    40
    The compounds which give positive Fehling's test are: (A) C6H5CHOC_{6}H_{5}CHO (B) C6H5COCH3C_{6}H_{5}COCH_{3} (C) HOCH2−CO−(CHOH)3−CH2−OHHOCH_{2}- CO - (CHOH)_{3}-CH_{2}- OH (D) CH3CHOCH_{3}CHO (E) C6H5CH2CHOC_{6}H_{5}CH_{2}CHO Choose the CORRECT answer from the options given below :

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  4. Question 4

    24 Jan 2026 S1

    39
    A student is given one compound among the following compounds that gives positive test with Tollen's reagent. The compound is :

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