JEE Chemistry Solved Question Paper 2011 | Previous Year Papers | Zigya

Subject

Chemistry

Class

JEE Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

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1.

Arrange the following in the order of increasing mass (atomic mass O = 16, Cu = 63, N = 14)

I. One atom of oxygen

II. One atom of nitrogen

III. 1 × 10-10 mole of oxygen

IV. 1 × 10-10  mole of copper

  • II < I < III < IV

  • I < II < III < IV

  • III < II < IV < I

  • II < IV < I < III


2.

Which transition in the hydrogen atomic spectrum will have the same wavelength as the transition will have the same wavelength, n = 4 to n = 2 of He+ spectrum?

  • n = 4 to = 3

  • n = 2 to n = 1

  • n = 4 to n = 2

  • n = 3 to n = 1


3.

Which of the following is not correct with respect to bond length of the species? 

  • C2C22-

  • B2+ > B2

  • Li2+ > Li2

  • O2 > O2-


4.

Intramolecular hydrogen bond is present in

  • water

  • o-nitrophenol

  • p-nitrophenol

  • methylamine


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5.

A mixture of ethane and ethene occupies 41 L at 1 atm and 500 K. The mixture reacts completely with 103mole of O2 to produce CO2 and H2O. The mole fraction of ethane and ethene in the mixture are respectively (R = 0.082 L atm K-1 mol-1)

  • 0.50, 0.50

  • 0.75, 0.25

  • 0.67, 0.33

  • 0.25, 0.75


6.

Substance which is weakly repelled by a magnetic field is

  • O2

  • H2O

  • CrO2

  • Fe3O4


7.

The correct decreasing order of first ionisation enthalpies of five elements of the second period is

  • Be > B > C > N > F

  • N > F > C > B > Be

  • F > N > C > Be > B

  • N > F > B > C > Be


8.

In the reaction H2S+ H2O2 → S+ 2H2O

  • H2S is an acid and H2O2 is a base

  • H2S is a base and H2O2 is an acid

  • H2S is an oxidising agent and H2O2 is a reducing agent

  • H2S is an reducing agent and H2O2 is a oxidising agent


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9.

The bonds present in the structure of dichromate ion are

  • four equivalent Cr-O bonds only

  • six equivalent Cr-O bonds and one Cr - O - O bond

  • six equivalent Cr-O bonds and one O-O bond

  • eight equivalent Cr-O bonds


10.

Molar heat capacity of aluminium is 25 JK-1 mol-1. The heat necessary to raise the temperature of 54 g of aluminium (atomic mass 27 g mol-1) from 30°C to 50°C is

  • 1.5 kJ

  • 0.5 kJ

  • 1.0 kJ

  • 2.5 kJ


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