CTET Solved Paper - UPTET October 2017 Paper2
66. The number of Π- electrons in the molecules of aromatic compound is
- Option : C
- Explanation : The number of Π-electrons in the molecules of aromatic compound is (4n + 2), where n is an integer (n=O,1,2, ... ). This is referred as Hiickel rule.
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67. Rutherford's alpha (α) particle scattering experiment resulted into the discovery of
- Option : B
- Explanation : (B) Rutherford's alpha (α) particle scattering experiment resulted into the discovery of nucleus in the atom.
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68. Which one of the following is not a heterogeneous mixture?
- Option : A
- Explanation : (A) Air is not a heterogeneous mixture. Air is a mixture of gas in gas. Air is a homogeneous mixture of a number of gases.
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- Option : C
- Explanation : (C) Silk farming is called sericulture.
In this silk producing direct Bombyx mori is cultured on Melhurry leaves. It's pupa produce silk as cocoon stage.
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70. All organisms belonging to the kingdom Protista are
- Option : A
- Explanation : (A) All organisms belonging to the kingdom Protista are unicellular and eukenyotic e.g. Euglena, Paramecium and Amoeba.
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