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  1. Atoms of an element differ from those of all other elements in

  2. A.

     Atomic number and electronic configuration.

    B.

     Number of neutrons and number of valence electrons.

    C.

     Atomic number and number of valence electrons.

    D.

     Number of neutrons and electronic configuration.

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  3. Nuclear fission is caused by the impact of:

  4. A.

     Neutron

    B.

     Proton

    C.

     Deuteron

    D.

     Electron

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  5. Which of the following rays are the most penetrating?

  6. A.

     Beta rays

    B.

     Alpha rays

    C.

     Gamma rays

    D.

     X-rays

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  7. How many colours the sunlight spectrum has?

  8. A.

     Three

    B.

     Seven

    C.

     Four

    D.

     Five

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  9. Which is/are the important raw material(s) required in cement industry?

  10. A.

     Gypsum and Clay

    B.

     Clay

    C.

     Limestone and Clay

    D.

     Limestone

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  11. Which type of fire extinguisher is used for petroleum fire?

  12. A.

     Powder type

    B.

     Liquid type

    C.

     Soda acid type

    D.

     Foam type

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  13. Which of the following is commonly called a 'poly-amide'?

  14. A.

     Terylene

    B.

     Nylon

    C.

     Rayon

    D.

     Orlon

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  15. Epoxy resins are used as:

  16. A.

     Detergents

    B.

     Insecticides

    C.

     Adhesives

    D.

     Moth repellents

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  17. Detergents used for cleaning clothes and utensils contain?

  18. A.

     Bicarbonates

    B.

     Bismuthates

    C.

     Sulphonates

    D.

     Nitrates

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  19. Which of the following is used for removing air bubbles from glass during its manufacture?

  20. A.

     Arsenous oxide

    B.

     Potassium carbonate

    C.

     Soda ash

    D.

     Feldspar

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