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الکوحل اور فینول

بارہویں جماعت · کیمیا · 5 سوالات

نام: ____________________   تاریخ: ____________

  1. Oxidation of a primary alcohol with acidified dichromate gives first:

    • A An ester
    • B An alkane
    • C A ketone
    • D An aldehyde

  2. Oxidation of a secondary alcohol gives a:

    • A Ketone
    • B Alkane
    • C Carboxylic acid
    • D Aldehyde

  3. Phenol is:

    • A Strongly basic
    • B Strongly acidic
    • C Weakly acidic
    • D Neutral

  4. Ethanol and ethanoic acid react in the presence of an acid catalyst to form:

    • A An ester
    • B An ether
    • C An aldehyde
    • D An alkene

  5. Methanol is poisonous because it is metabolised to:

    • A Water only
    • B Ethanol
    • C Methanal and methanoic acid
    • D Glucose

جوابی کلید

1. D, 2. A, 3. C, 4. A, 5. C

  1. Primary alcohols give aldehydes and then carboxylic acids.

  2. Secondary alcohols oxidise to ketones.

  3. Phenol is a weak acid, stronger than alcohols.

  4. This is esterification, giving ethyl ethanoate.

  5. These products damage the optic nerve and other tissues.