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Chemistry - section - 2
  1. The iron ore magnetite consists of

    2. A.

     Fe2O3
    B.

     Fe3OH4
    C.

     FeCO3
    D.

     3Fe2O3 .3H2O

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  2. The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is

    3. A.

     5x/36
    B.

     5x
    C.

     7.2 x
    D.

     x/6

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  3. The major constituent of air is

    4. A.

     carbon dioxide
    B.

     nitrogen
    C.

     oxygen
    D.

     hydrogen

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  4. The main chemical constituent of clay is

    5. A.

     silicon oxide
    B.

     aluminium borosilicate
    C.

     zeolites
    D.

     aluminium silicate

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  5. The mineral containing both magnesium and calcium is

    6. A.

     magnesite
    B.

     calcite
    C.

     carnallite
    D.

     dolomite

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  6. The metal does not give H2 on treatment with dilute HCL is

    7. A.

     Zn
    B.

     Fe
    C.

     Ag
    D.

     Ca

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  7. The number of g-molecule of oxygen in 6.02 x 1024 CO molecules is

    8. A.

     1 gram of molecule
    B.

     0.5 gram of molecule
    C.

     5 gram of molecule
    D.

     10 gram of molecule

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  8. The most extensive, commercially useful source of thorium as monazite sand occurs in India at

    9. A.

     Orissa coast
    B.

     Travancore coast
    C.

     West Bengal coast
    D.

     Gujarat coast

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  9. The main active constituent of tea and coffee is

    10. A.

     nicotine
    B.

     chlorophyll
    C.

     caffeine
    D.

     aspirin

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  10. The maximum number of isomers for an alkene with molecular formula C4H8 is

    11. A.

     5
    B.

     4
    C.

     2
    D.

     3

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