Which one of the following pair shows Buffer s solution? from Ch

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


B.

CH3COONa + CH3COOH

Buffer's solutions are the solutions which resists the chnages in its pH value on addition of small amount of a base or an acid. 

Among all the given options, CH3COOH and CH3COONa are the example of Buffer's solutions because they are the combination of weak acid and salt of strong base.


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6.

Which of the following chloride is water insoluble?

  • HCl

  • AgCl

  • Both 'a' and 'b'

  • None of these


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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