Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

11.

Which of the following statements about the interstitial compounds is incorrect?

  • They retain metallic conductivity

  • They are chemically reactive

  • They are much harder than the pure metal

  • They have higher melting points than the pure metal


12.

Which one of the following molecules contain no π-bond?

  • CO2

  • H2O

  • SO2

  • NO2


13.

6.02 x 1020 molecules of urea are present in 100 mL of its solution. The concentration of solution is

  • 0.02 M

  • 0.01 M

  • 0.001 M

  • 0.1 M


14.

KMnO4 can be prepared from K2MnOas per reaction

  3MnO42- + 2H2O  2MnO4- + MnO2 + 4OH-

The reaction can go to completion by removing OH- ions by adding

  • HCl

  • KOH

  • CO2

  • SO2


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15.

Which of the following structure is similar to graphite?

  • BN

  • B

  • B4C

  • B2H6


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16.

The basic structural unit of silicates is

  • SiO-

  • SiO44-

  • SiO32-

  • SiO42-


B.

SiO44-

The basic building unit of all silicates is the tetrahedral SiO44-. It is represented as

                        

 


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17.

Identify the correct order of solubility in aqueous medium.

  • CuS > ZnS > Na2S

  • ZnS > Na2S > CuS

  • Na2S > CuS > ZnS

  • Na2S > ZnS > CuS


18.

Which of the following is electron deficient?

  • (CH3)2

  • (SiH3)2

  • (BH3)2

  • PH3


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19.

Which of these is not a monomer for a high molecular mass silicone polymer?

  • MeSiCl3

  • Me2SiCl2

  • Me3SiCl

  • PhSiCl3


20.

The structure of isobutyl group in an organic compound is

  • C2H6-CH-CH2-

  • CH3-CH|-CH2-CH3

  • CH3-CH2-CH2-CH2-

  • CH3-C(C2H6)-


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