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.
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.
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.
- 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.
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.
