The heat of neutralisation of a strong acid and a strong alkali i

Subject

Chemistry

Class

JEE Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

An aqueous solution of urea containing 18g urea in 1500 cm3 of the solution has a density equal to 1.052. If the molecular weight of urea is 60, the molality of the solution is

  • 0.200

  • 0.192

  • 0.100

  • 1.200


2.

What volume of 2M H2SO4 is required to form 0.2 N of 100 mL of solution?

  • 5 mL

  • 20 mL

  • 10 mL

  • 50 mL


3.

Which of the following salts will not undergo hydrolysis?

  • NH4Cl

  • KCN

  • KNO3

  • Na2CO3


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4.

The heat of neutralisation of a strong acid and a strong alkali is 57.0 kJ mol-1.The heat released when 0.5 mole of HNO3 solution is mixed with 0.2 mole of KOH is 

  • 57.0 kJ

  • 11.4 kJ

  • 28.5 kJ

  • 34.9 kJ


B.

11.4 kJ

0.2 mole will neutralise 0.2 mole of HNO3Heat evolved = 57 × 0.2                             = 11.4 kJ


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5.

The solubility product of Ag2CrO4 is 32 × 10-12. What is the concentration of CrO42- ions in that solution?

  • 2 × 10-4

  • 16 × 10-4

  • 8 × 10-4

  • 12× 10-4


6.

90Th228 emits four alpha and one beta particles. Number of neutrons in daughter element is

  • 129

  • 190

  • 232

  • 138


7.

One atomic mass is equal to

  • 1.66 × 10-27 g

  • 1.66 × 10-24 g

  • 1.66 × 10-23 g

  • 1.66 × 1025 g


8.

The heat of combustion of carbon is - 393.5 kJ/mol. The heat released upon the formation of 35.2 g of CO2 from carbon and oxygen gas is

  • + 315 kJ

  • - 31.5 kJ

  • - 315 kJ

  • + 31.5 kJ


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9.

The atomic number of Sn is 50. The shape of gaseous SnCl2 molecule is

  • Cl-Sn-Cl


10.

The central carbon atom of a free radical contains

  • 6 electrons

  • 7 electrons

  • 8 electrons

  • 10 electrons


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