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Chemistry - section - 2
  1. Commercial nitric acid is coloured because it contains dissolved :

    2. A.

     Oxygen
    B.

     Nitrous oxide
    C.

     Nitrogen dioxide
    D.

     Coloured impurities

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  2. Choose the incorrect statement pertaining to organic compounds

    3. A.

     They have low melting and boiling points
    B.

     They do not dissolve in water
    C.

     They are not easily combustible
    D.

     They contain mainly carbon and hydrogen

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  3. The gas which emits from rice field is

    4. A.

     Ethane
    B.

     Methane
    C.

     Nitrogen
    D.

     All of the above

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  4. Ethylene is a ________ molecule.

    5. A.

     Polar
    B.

     Ionic
    C.

     Covalent
    D.

     Nonpolar

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  5. The next higher homologue of C6H14 is

    6. A.

     C7H14
    B.

     C7H12
    C.

     C6H12
    D.

     C7H16

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  6. The gas used for artificial fruit ripening of green fruit is –

    7. A.

     Ethylene
    B.

     Acetylene
    C.

     Ethane
    D.

     Methane

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  7. The natural source of hydrocarbon is

    8. A.

     Crude oil
    B.

     Biomass
    C.

     Coal
    D.

     Carbohydrates

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  8. By which organic compound all the oils are known ?

    9. A.

     Carbohydrate
    B.

     Protein
    C.

     Hydrocarbon
    D.

     Ester

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  9. Which of the following elements is found in all organic compounds?

    10. A.

     Carbon
    B.

     Calcium
    C.

     Nitrogen
    D.

     Oxygen

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  10. Ethanol containing 5% water is known as :

    11. A.

     Dilute alcohol
    B.

     Power alcohol
    C.

     Rectified spirit
    D.

     Absolute alcohol

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