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Chemistry Test - 65

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Chemistry Test - 65
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Weekly Quiz Competition
  • Question 1
    1 / -0

    Positive ions are formed from neutral atoms by loss of

    Solution

    Positive ions are formed from neutral atoms by loss of electrons.

  • Question 2
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    Trichloroacetaldehyde was subject to Cannizzaro's reaction by using NaOH. The mixture of the products contains sodium trichloroacetate and another compound. The other compound is :

    Solution

  • Question 3
    1 / -0

    The presence or absence of hydroxy group on which carbon atom of sugar differentiates RNA and DNA ?

    Solution

    RNA has hydroxy group attached at the 2nd C-atom while DNA does not.

  • Question 4
    1 / -0

    Modern periodic table is based on atomic number of the elements. The significance of atomic number was proved by the experiment of ________

    Solution

    Modern periodic table is based on atomic number of the elements. The significance of atomic number was proved by the experiment ofMoseley's work on X-ray spectra.

  • Question 5
    1 / -0

    In photography, the compound of nitrogen used is

    Solution

    Silver nitrate is the basic substance from which silver bromide is obtained. The photographic films are impregnated with the light sensitive AgBr.

  • Question 6
    1 / -0

    Heated saw dust catches fire when a drop of concentrated nitric acid is added to it. This is due to

    Solution

    Heated saw dust catches fire when a drop of concentrated nitric acid is added to it. This is due tooxidation.

  • Question 7
    1 / -0

    Natural radioactivity was discovered by

    Solution

    Natural radioactivity was discovered by Becquerel.

  • Question 8
    1 / -0

    The freezing point of water at 760mm pressure is

    Solution

    K is degree kelvin

    Zero K corresponds to -273 K = C + 273

    The freezing point of water being 0 C, on the kelvin scale it is 0 C + 273 K

  • Question 9
    1 / -0

    What is the Iupac name for the compound shown below.

    Solution

    In chemical nomenclature, the IUPAC nomenclature of organic chemistry is a systematic method of naming organic chemical compounds as recommended by the International Union of Pure and Applied Chemistry (IUPAC).

  • Question 10
    1 / -0

    Natural Rubber is a Polymer of

    Solution

    Natural Rubber is a Polymer derived from Isoprene.

    Natural rubber is an addition polymer that is obtained as a milky white fluid known as Latex from a Tropical Rubber Tree.

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