Which of the following statement is correct for a nucleophile? 

Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

11.

If the equilibrium constant for 

straight N subscript 2 space left parenthesis straight g right parenthesis space plus space straight O subscript 2 space left parenthesis straight g right parenthesis space rightwards harpoon over leftwards harpoon space 2 space NO space left parenthesis straight g right parenthesis space is space straight K comma space the space equilibrium space constant space for
1 half straight N subscript 2 space left parenthesis straight g right parenthesis space plus space 1 half straight O subscript 2 left parenthesis straight g right parenthesis space rightwards harpoon over leftwards harpoon space NO space left parenthesis straight g right parenthesis space will space be

  • K1/2

  • K/2

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12.

An aqueous solution of which of the following compounds is the best conductor of electric current?

  • Acetic acid C2H4O2

  • Hydrochloric acid, HCl

  • Ammonia, NH3

  • Ammonia, NH3

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13.

What is the mole fraction of the solute in a 1.00 m aqueous solution? 

  • 0.177

  • 1.770

  • 0.0354

  • 0.0354

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14.

The number of water molecules is maximum in 

  • 18 molecules of water

  • 1.8 g of water

  • 18 g of water

  • 18 g of water

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15.

In which of the following pairs, both the species are not isostructural?

  • SiCl4.PCl4+

  • Diamond, carbide

  • NH3, PH3

  • NH3, PH3

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16.

On heating which of the following releases CO2 most easily?

  • K2CO3

  • Na2CO3

  • MgCO3

  • MgCO3

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17.

Which of the following statement is correct for a nucleophile? 

  • Nucleophile is s Lewis acid

  • Ammonia is a nucleophile

  • Nucleophiles attack low electrons density sites

  • Nucleophiles attack low electrons density sites


A.

Nucleophile is s Lewis acid

Nucleophiles are electron rich species. Hence, act as a Lewis base but not Lewis acid.

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18.

The number of structural isomers possible from the molecular formula C3H9N is 

  • 4

  • 5

  • 2

  • 2

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19.

Two possible stereo-structures of CH3CHOH.COOH, which are optically active, are called

  • diastereomers

  • atropisomers

  • enantiomers

  • enantiomers

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20.

Gadolinium belongs to 4f series. Its atomic number is 64. which of the following is the correct electronic configuration of gadolinium?

  • [Xe]4f8 6d2

  • [Xe]4f95s1

  • [Xe]4f7 5d16s2

  • [Xe]4f7 5d16s2

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