H-bond is strongest in from Chemistry NEET Year 2005 Free Solved

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


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4.

H-bond is strongest in

  • C2H5OH

  • H-F

  • H2O

  • CH3COCH3


B.

H-F

All compound which have hydrogen atom attached to F, O or N atom (i.e. highly electronegative atoms) exhibit H-bonding. In the question H - F exhibit strongest H-bonding because F is the most electronegative element.


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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


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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