Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

A + B C + D. If initially the concentration of A and B are both equal but at equilibrium, concentration of D will be twice of that of A, then what will be the equilibrium constant of reaction?

  • 4/9

  • 9/4

  • 1/9

  • 4


2.

The geometry of Ni(CO)4 and Ni(PPh3)2Cl2 are:

  • both square planar

  • tetrahedral and square planar respectively

  • both tetrahedral

  • square planar and tetrahedral respectively


3.

Which of the following is not a property of liquid state ?

  • Intermolecular force of attraction in a liquid is quite large

  • All liquids accompanied by cooling on evaporation

  • Lower the boiling point of a liquid, greater is its vapour pressure at room temperature

  • A liquid boils at high temperature at the top of a mountain than at the sea level


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4.

If for a sucrose solution, elevation in boiling point is 0.1°C, then what will be the boiling point of NaCl solution for same molal concentration ?

  • 0.1°C

  • 0.2°C

  • 0.08°C

  • 0.01°C


B.

0.2°C

Elevation in boiling point is a colligative property as it depends upon the number of particles.

Tb  n

For sucrose, n = 1; Tb = 0.1°C

    For NaCl, n = 2; T= 0.2°C


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5.

Which of the following have maximum number of unpaired electrons ?

  • Fe3+

  • Fe2+

  • Co2+

  • Co3+


6.

What will be the order of Ist ionisation energy?

  • Li > Na > K

  • K > Li > Na

  • Na > Li > K

  • Li > K > Na


7.

Given pH of a solutionA is 3 and it is mixed with another solution B having pH 2. If both mixed, then resultant pH of the solution will be :

  • 3 : 2

  • 1 : 9 

  • 3 : 4

  • 3 : 5


8.

With which of the given pairs CO2 resembles ?

  • HgCl2, C2H2

  • HgCl2, SnCl4

  • C2H2, NO2

  • N2O, NO2


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9.

If magnetic quantum number of a given atom represented by -3, then what will be its principal quantum number ?

  • 2

  • 3

  • 4

  • 5


10.

Which of the following have highest electron affinity?

  • F

  • Cl

  • N

  • O


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