a/ V2 given in van der Waal s equation is for from Chemistry NEE

Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

The pH of a 10-10M - NaOH solution is

  • 10

  • 7.01

  • 6.99

  • 4


2.

Which has minimum solubility?

  • Bi2S3

  • Ag2S

  • CoS

  • PbS


3.

Ratio of molecular weights of A and B is 425 then ratio of rates of diffusion will be

  • 5 : 1

  • 5 : 2

  • 25 : 3

  • 25 : 4


4.

H-bond is strongest in

  • C2H5OH

  • H-F

  • H2O

  • CH3COCH3


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5.

a/ V2 given in van der Waal's equation is for

  • internal pressure

  • inter molecular attraction

  • both (1) and (2)

  • temperature correction


B.

inter molecular attraction

For the explaination of real gas behaviour van der Waal gave an equation. The gas pressure is changed due to intermolecular attraction. By adding aV2 the pressure value is made correct.


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6.

Hybridization of 1 and 2 carbon atom in

C1H2C2 = CHare

  • sp, sp

  • sp2, sp2

  • sp2, sp

  • sp3, sp2


7.

C(dia) + O2  CO2H = - 395.4 kJ/ mol

C(gr) + O2 CO2H   = - 393.5 kJ/ mol

C(gr) C(dia)H = ?

  • -3.8

  • -1.9

  • +3.8

  • +1.9


8.

The internal energy of a substance

  • decrease with increase in temperature

  • increase with increase in temperature

  • remains unaffected with change in temperature

  • calculated by E = mc2


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9.

In an isothermal process

  • H = E+PV

  • H = W

  • H = E

  • H =ST


10.

Number of orbitals in L energy level

  • 1

  • 2

  • 3

  • 4


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