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General Knowledge :: Chemistry

Chemistry - Section 1
Chemistry - section-3
Chemistry - section-4
Chemistry - section-5
Chemistry - section-6
Chemistry - section-7
Chemistry - section-8
Chemistry - section-9
Chemistry - section-10
Chemistry - section-11
Chemistry - section-12
Chemistry - section-13
Chemistry - section-14
Chemistry - section-15
Chemistry - section-16
Chemistry - section-17
Chemistry - section - 2

  1. The number of waves in n x 10th Bohr's orbit are

    2. A.
    n2
    B.
    n
    C.
    n-2
    D.
    n3

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  2. The mass of one Avogadro number of helium atom is

    3. A.
    1.00 gram
    B.
    4.00 gram
    C.
    8.00 gram
    D.
    4 x 6.02 x 1023 gram

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  3. The items amenable to detection by soft x-rays are

    4. A.
    contrabands
    B.
    lead in bullets
    C.
    narcotics
    D.
    genuine coins from counterfeit coins

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  4. The material which can be deformed permanently by heat and pressure is called a

    5. A.
    thermoplastic
    B.
    thermoset
    C.
    chemical compound
    D.
    polymer

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  5. The mass number of a nucleus is

    6. A.
    always less than its atomic number
    B.
    the sum of the number of protons and neutrons present in the nucleus
    C.
    always more than the atomic weight
    D.
    a fraction

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  6. The inexpensive and commonly used variety of glass is called soda glass. It is called so because

    7. A.
    was used initially for making bottles of soda(carbonated drink)
    B.
    is made using soda(sodium carbonate)
    C.
    was initially used for storing sodium carbonate
    D.
    is made using soda lime

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  7. The gas used in the manufacture of vanaspati from vegetable oil is

    8. A.
    hydrogen
    B.
    oxygen
    C.
    nitrogen
    D.
    carbon dioxide

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  8. The ionic radii of N3-, O2-, F- and Na+ follows the order

    9. A.
    N3- > O2- > F- > Na+
    B.
    N3- > Na+ > O2- > F-
    C.
    Na+ > O2- > N3- > F-
    D.
    O2- > F- > Na+ > N3-

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  9. The graphite rods in the nuclear reactor

    10. A.
    react with U to release energy
    B.
    produce neutrons
    C.
    undergo combustion which triggers the nuclear fission
    D.
    convert fast moving neutrons into thermal neutrons

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  10. The first metal used by man was

    11. A.
    iron
    B.
    copper
    C.
    gold
    D.
    bronze

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