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Chemistry - section - 2
  1. Chemical name of common salt is

    2. A.

     Sodium Chloride
    B.

     Sodium Bicarbonate
    C.

     Sodium
    D.

     Sodium Oxide

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  2. Nitrogen forms a variety of compounds in all oxidation states ranging from

    3. A.

     –3 to +5
    B.

     –3 to +3
    C.

     –3 to +4
    D.

     –3 to +6

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  3. What is the covalency of nitrogen in ammonia molecule

    4. A.

     2
    B.

     3
    C.

     4
    D.

     5

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  4. What is 'milk of magnesia' chemically?

    5. A.

     Magnesium carbonate
    B.

     Sodium bicarbonate
    C.

     Calcium hydroxide
    D.

     Magnesium hydroxide

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  5. Which one of the following is a micro-element ?

    6. A.

     Chlorine
    B.

     Hydrogen
    C.

     Nitrogen
    D.

     Oxygen

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  6. Chemical name of bleaching powder is :

    7. A.

     Calcium chlorate
    B.

     Calcium hypochlorite
    C.

     Calcium chloro hypochlorite
    D.

     Calcium bi chloride

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  7. The chemical formula of the laughing gas is

    8. A.

     NO
    B.

     N2O
    C.

     NO2
    D.

     N2O3

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  8. The common name for the compound having formal NaOH is

    9. A.

     Caustic soda
    B.

     Caustic potash
    C.

     Soda ash
    D.

     Sodium hydroxide

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  9. Philosopher’s wool is chemically

    10. A.

     Aluminium oxide
    B.

     Magnesium oxide
    C.

     Zinc oxide
    D.

     Calcium oxide

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  10. What is the atomic number of Oxygen?

    11. A.

     5
    B.

     8
    C.

     12
    D.

     22

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