Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

In which of the following pairs of molecules/ions, the central atoms have sp2 hybridization?

  • NO2- and NH3

  • BF3 and NO2-

  • NH2- and H2O

  • NH2- and H2O

1608 Views

2.

If pH ofa saturated solution of Ba(OH)2 is 12, the value of its Ksp is 

  • 4.00 x 10-6 M3

  • 4.00 x 10-7 M3

  • 5.00 x 10-6 M3

  • 5.00 x 10-6 M3

435 Views

3.

Which one of the following species does not exist under normal conditions?

  • Be2+

  • Be2

  • B2

  • B2

1091 Views

4.

The number of atoms in 0.1 moles of a triatomic gas is (NA = 6.02 x 1023 mol-1)

  • 6.026 x 1022

  • 1.806 x 1023

  • 3.600 x 1023

  • 3.600 x 1023

865 Views

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5.

Which of the following represents the correct order of increasing electron gain enthalpy with negative sign for the elements O, S, F and Cl?

  • Cl < F < O < S

  • O < S < F< Cl

  • F < S < O < Cl

  • F < S < O < Cl

812 Views

6.

Standard entropies X2, Y2 and XY2 are 60, 40 and 50 J K-1 mol-1 respectively for the reaction

1 half space straight X subscript 2 space plus 3 over 2 space straight Y subscript 2 space leftwards harpoon over rightwards harpoon space XY subscript 3 space semicolon space increment straight H space equals space minus space 30 space kJ comma space to space be space at
equilibrium, the temperature should be

  • 750 K

  • 1000 K 

  • 1250 K

  • 1250 K

581 Views

7.

In which one of the following species the central atom has the type of hybridisation which si not the same as that present in the other three? 

  • SF4

  • I3-

  • SbCl52-

  • SbCl52-

640 Views

8.

The correct order of the decreasing ionic radii among the following isoelectronic species is

  • Ca2+ > K+ >S2- > Cl-

  • Cl- > S2- > Ca2+ > K+

  • S2- > Cl- > K+ > Ca2+

  • S2- > Cl- > K+ > Ca2+

1046 Views

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9.

Which of the following pairs has the same size? 

  • Fe2+ , Ni2+

  • Zr4+, Ti4+

  • Zr4+, Hf4+

  • Zr4+, Hf4+

390 Views

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10.

What is [H+] in mol/L of a solution that is 0.20 M in CH3COONa and 0.10 M in CH3COOH? 
(Ka for CH3COOH = 1.8 x 10-5 )

  • 3.5 x 10-4

  • 1.1 x 10-5

  • 1.8 x 10-5

  • 1.8 x 10-5


D.

1.8 x 10-5

CH3COOH (weaK acid) and CH3COONa (conjugated salt) form acidic buffer and for acidic buffer,

1232 Views

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