The pH of solution containing 0.10 M sodium acetate and 0.03

Subject

Chemistry

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

The weight of one molecule of a compound C60H120 is :

  • 1.2 x 10-20 g

  • 5.025 x 1023 g

  • 1.4 x 10-21 g

  • 6.023 x 1023 g


2.

If P is pressure and ρ is density of a gas, then P and ρ are related as :

  •  ρ

  •  1ρ

  •  ρ2

  •  1ρ2


3.

Quantum numbers of an atom can be defined on the basis of :

  • Hund's rule

  • Pauli's exclusion principle

  • Aufbau's principle

  • Heisenberg's uncertainty principle


4.

Which of the following has maximum energy ?


  • 3s                      3p                                     3d
                 

  • 3s                      3p                                   3d
               

  • 3s                     3p                                     3d
             

  • 3s                    3p                                 3d
               


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5.

At 80°C, distilled water has H+ ions concentration equal to 1 x 10-6 mole/litre. The value of KW at this temperature will be :

  • 1 X 10-6

  • 1 X 10-12

  • 1 X 10-9

  • 1 X 10-15


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6.

The pH of solution containing 0.10 M sodium acetate and 0.03 M acetic acid is :

(pKa for CH3COOH = 4.57)

  • 4.09

  • 6.09

  • 5.09

  • 7.09


C.

5.09

According to Henderson's equation,

pH = pKa + log [salt][acid]

CH3COOH + NaOH  CH3COONa + H2O

Putting the values, we get :

pH = 4.57 + log 0.100.03

 pH = 5.09


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7.

Spectrum of Li2+ is similar to that of :

  • H

  • Be

  • He

  • Ne


8.

Which of the following molecule has highest bond energy ?

  • F-F

  • N-N

  • C-C

  • O-O


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9.

The heat of neutralization of a strong base and a strong acid is 57 kJ. The heat released when 0.5 mole of HNO3 solution is added to 0.20 moles of NaOH solution, is :

  • 11.4 kJ

  • 34.7 kJ

  • 23.5 kJ

  • 58.8 kJ


10.

The solubility of CuBr is 2 x 10-4 mol/L at 25°C. The KSP value for CuBr is :

  • 4 x 10-8 mol2 L-2

  • 4 x 10-4 mol2 L-2

  • 4 x 10-11 mol2 L-2

  • 4 x 10-15 mol2 L-2


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