JEE Chemistry Solved Question Paper 2014 | Previous Year Papers | Zigya

Subject

Chemistry

Class

JEE Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

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1.

The standard molar heat of formation of ethane, CO2 and water (l) are respectively -21.1, -94.1 and -68.3 kcal. The standard molar heat of combustion of ethane will be

  • -372 kcal

  • 162 kcal

  • -240 kcal

  • 183.5 kcal


2.

The solubility product of Ag2CrO4 is 32 x 10-12.What is the concentration of CrO4- ions in that solution?

  • 2x 10-4 M

  • 16x 10-4 M

  • 8x 10-4 M

  • 8x 10-8 M


3.

A gaseous mixture containing He, CH4 and SO2 was allowed to effuse through a fine hole then find what molar ratio of gases coming out initially? (Given mixture contains He, CH4 and SO2 in 1 : 2: 3 mole ratio).

  • 2:2: 3

  • 2: 2: 3

  • 4: 4: 3

  • 1: 1: 3


4.

According to Bohr's theory, the angular momentum for an electron of 3rd orbit is

  • 3h

  • 1.5h

  • 9h

  • 2hπ


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5.

2.76 g of silver carbonate on being strongly heated yields a residue weighing

  • 3.45g 

  • 3.0g

  • 1.36g

  • 2.16g


6.

Which of the following has the maximum number of unpaired d-electrons?

  • Fe2+

  • Cu+

  • Zn

  • Ni3+


7.

The volume strenght  of 1.5 N H2O2 solution is 

  • 16.8L

  • 8.4L

  • 4.2L

  • 5.2L


8.

Among [Fe(H2O)6]+, [Fe(CN)6]3-, [Fe(Cl)6]3- species, the hybridisation state of the Fe atom are, respectively.

  • d2sp3, d2sp3, sp3d2

  • sp3d2,d2sp3, d2sp3

  • sp3d2, d2sp3,sp3d2

  • None of the above


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9.

The rate constant for forward reaction and backward reaction of hydrolysis of ester are 1.1 x10-2 and 1.5 x10-3 per minute respectively. Equilibrium constant for the reaction is

      CH3COOC2H5 + H2O  CH3COOH + C2H5OH

  • 33.7

  • 7.33

  • 5.33

  • 33.3


10.

19.85 mL of 0.1 N NaOH reacts with 20 mL of HCl solution for complete neutralisation. The molarity of HCl solution is

  • 9.9

  • 0.99

  • 0.099

  • 0.0099


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