Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

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11.

Lowest MP and BP is of

  • Ar

  • Xe

  • He

  • Ne


C.

He

The melting and boiling point of noble gases are low because of the presence of weak Van der Waals forces or weak London dispersion forces between the atoms of the noble gases.


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12.

H3PO3 is

  • dibasic acid

  • basic

  • tribasic acid

  • neutral


13.

35.4 mL of HCl is required for the neutralization of a solution containing 0.275 g of sodium hydroxide. The normality of hydrochloric acid is?

  • 0.97 N

  • 0.142 N

  • 0.194 N

  • 0.244 N


14.

When H2S gas is passed in a metal sulphate solution in presence of NH4OH, a white precipitate is produced. The metal is identified as

  • Zn

  • Fe

  • Pb

  • Hg


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15.

The value of amu is which of the following?

  • 1.57 × 10-24 kg

  • 1.66 × 10-24 kg

  • 1.99 × 10-23 kg

  • 1.66 × 10-27 kg


16.

The molecule having largest dipole moment among the following is

  • CHI3

  • CH4

  • CHCl3

  • CCl4


17.

Which of the following electronic configuration represents noble gas?

  • ns2np6

  • ns2np5

  • ns2np4

  • ns2np3


18.

The molarity of pure water is:

  • 100

  • 55.6

  • 18

  • 5.56


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19.

The most reactive hydrocarbon is :

  • methane

  • ethane

  • ethylene

  • acetylene


20.

The density of SO2 at STP is 2.86 kg m3. Its density at 819°C and 2 atmospheres is:

  • 0.715 kg m-3

  • 1.43 kg m-3

  • 2.86 kg m-3

  • 4.26 kg m-3


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