Subject

Science

Class

TET Class 12

Pre Boards

Practice to excel and get familiar with the paper pattern and the type of questions. Check you answers with answer keys provided.

Sample Papers

Download the PDF Sample Papers Free for off line practice and view the Solutions online.
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 Multiple Choice QuestionsMultiple Choice Questions

1.

Which of the following has maximum number of atoms?

  • 16 g N2

  • 16 g of CO2

  • 16 g of CH4

  • 16 g of O2


2.

In laboratory, ethylene and acetylene can be distinguished by

  • Br2/H2O

  • KMnO4/OH/H2O

  • Tollens' reagent

  • Fehling solution


3.

In which of the following compounds, the oxidation number of oxygen is +2?

  • OF2

  • Na2O

  • NaO2

  • NaO3


4.

The monomer of natural rubber is

  • Neoprene

  • Isoprene

  • Terylene

  • Orlon


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5.

Which compound has the highest boiling point?

  • n-pentane

  • Isopentane

  • Neopentane

  • Isobutane


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6.

The number of π-electrons in the molecules of aromatic compound is


  • 4n

  • 4n+1

  • 4n+2

  • 2n+4


C.

4n+2

The number of π-electrons in the molecules of the aromatic compound is ( 4n + 2), where n is an integer (n= 0, 1, 2,..) This is referred as Huckel rule.


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7.

Rutherford's alpha (α) particle scattering experiment resulted into the discovery of

  • proton

  • nucleus in the atom

  • electron

  • atomic mass


8.

Which one of the following is not a heterogeneous mixture?

  • Air

  • Milk

  • Smoke

  • Jelly


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9.

Silk farming is known as

  • Epiculture

  • Pisciculture

  • Sericulture

  • Agriculture


10.

All organisms belonging to the kingdom Protista are

  • unicellular and eukaryotic

  • unicellular and prokaryotic

  • multicellular and prokaryotic

  • multicellular and eukaryotic


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