Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

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


2.

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


3.

The molecule having largest dipole moment among the following is :

  • CHI3

  • CH4

  • CHCl3

  • CCl4


4.

Which one of the following has unit positive charge and 1 amu mass ?

  • Electron

  • Neutron

  • Proton

  • None of these


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5.

Which one of the following pair shows Buffer's solution?

  • NaCl + NaOH

  • CH3COONa + CH3COOH

  • CH3COOH + CH3COONH4

  • H2SO4 + CuSO4


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6.

Which of the following chloride is water insoluble?

  • HCl

  • AgCl

  • Both 'a' and 'b'

  • None of these


B.

AgCl

AgCl is insoluble in water because the forces favouring the formation of silver hydroxide are too weak to break the ionic bonds between silver and chlorine.


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7.

By dissolving 5 g substance in 50 g of water, the decrease in freezing point is 1.2°C. The gram molal depression is 1.85°C. The molecular weight of substance is :

  • 105.4

  • 118.2

  • 137.2

  • 154.2


8.

Which is correct for an enothermic reaction?

  • H is positive

  • H is negative

  • E is negative

  • H= zero


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9.

The radius of hydrogen atom is 0.53 Å. The radius of 3Li2+ is of:

  • 1.27 Å

  • 0.17 Å

  • 0.57 Å

  • 0.99 Å


10.

The correct sequence of hybridisation of methane, ethene and acetylene is :

  • sp, sp2, sp3

  • sp2, sp3, sp

  • sp3, sp2, sp

  • sp3, sp, sp2


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