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نامیاتی کیمیا

Written by Dr. Ayesha Nadeem (Chemistry)

دسویں جماعت · کیمیا · 9 سوالات

نام: ____________________   تاریخ: ____________

  1. Organic compounds always contain:

    • A Sulphur
    • B Carbon
    • C Oxygen
    • D Nitrogen

  2. Which of these is a functional group of alcohols?

    • A -CHO
    • B -NH2
    • C -OH
    • D -COOH

  3. The functional group of carboxylic acids is:

    • A -COOH
    • B -CO-
    • C -CHO
    • D -OH

  4. Compounds with the same formula but different structures are called:

    • A Isotopes
    • B Polymers
    • C Isomers
    • D Allotropes

  5. Ethanol has the formula:

    • A C2H6
    • B CH3OH
    • C CH3COOH
    • D C2H5OH

  6. The first member of the alkane family is:

    • A Methane
    • B Propane
    • C Ethane
    • D Butane

  7. Petroleum is a mixture of:

    • A Salts
    • B Metals
    • C Hydrocarbons
    • D Acids

  8. The formula of ethane is:

    • A C2H2
    • B CH4
    • C C2H4
    • D C2H6

  9. Which is an alcohol?

    • A CH3COCH3
    • B CH3COOH
    • C CH3OH
    • D CH3CHO

جوابی کلید

1. B, 2. C, 3. A, 4. C, 5. D, 6. A, 7. C, 8. D, 9. C

  1. Carbon is the element common to all organic compounds.

  2. Alcohols contain the hydroxyl group, -OH.

  3. Carboxylic acids contain the -COOH group.

  4. These are isomers.

  5. Ethanol is C2H5OH.

  6. Methane, CH4.

  7. It is mostly hydrocarbons.

  8. Ethane is C2H6.

  9. CH3OH is methanol.