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General Knowledge :: Chemistry

  1. The name of unreactive gas is

  2. A.

     Carbon dioxide

    B.

     Hydrogen

    C.

     Nitrogen

    D.

     Oxygen

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  3. The green colour seen in firework displays is due to the chloride salt of :

  4. A.

     Sodium

    B.

     Strontium

    C.

     Barium

    D.

     Calcium

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  5. In deep-sea diving, divers use a mixture of gases consisting of oxygen and

  6. A.

     Hydrogen

    B.

     Nitrogen

    C.

     Argon

    D.

     Helium

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  7. Now-a-days yellow lamps are frequently used as street lights. Which of the following gases is used in these lamps ?

  8. A.

     Sodium

    B.

     Neon

    C.

     Hydrogen

    D.

     Nitrogen

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  9. Which of the following is not soluble in water ?

  10. A.

     Lead Sulphate

    B.

     Zinc sulphate

    C.

     Potassium sulphate

    D.

     Sodium sulphate

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  11. The most volatile of the given liquids is

  12. A.

     Ether

    B.

     Liquid

    C.

     Liquid NH3

    D.

     Liquid He

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  13. The three elements most needed in common fertilisers are :

  14. A.

     Sulphur, Phosphorous and Sodium

    B.

     Nitrogen, Potassium and Phosphorous

    C.

     Phosphorous, Sodium and Nitrogen

    D.

     Calcium, Phosphorous and Potassium

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  15. Liquid Nitrogen boils at

  16. A.

     77 kelvin

    B.

     82 Kelvin

    C.

     54 kelvin

    D.

     97 Kelvin

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  17. Which one of the following is not a fertilizer?

  18. A.

     Ammonium sulphate

    B.

     Calcium sulphate

    C.

     Calcium ammonium nitrate

    D.

     Potassium nitrate

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  19. Which of the following gases is mixed with oxygen for breathing by divers in aqua lungs?

  20. A.

     Methane

    B.

     Nitrogen

    C.

     Helium

    D.

     Hydrogen

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