JEE Chemistry Solved Question Paper 2012 | 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 quantum number which explains the line spectra observed as doublets in case of hydrogen and alkali metals and doublets and triplets in case of alkaline earth metals is

  • spin

  • azimuthal

  • magnetic

  • principal


2.

The formal charges of C and O atoms in CO2 ( :Ö= C=:Ö) are respectively

  • 1, -1

  • -1,1

  • 2,-2

  • 0,0


3.

According to molecular orbital theory, the total number of bonding electron pairs in O2 is

  • 2

  • 3

  • 5

  • 4


4.

Which one of the following equations represents the variation of viscosity coefficient (η) with temperature (T)?

  • η= Ae-E/RT

  • η= AeE/RT

  • η= Ae-E/kT

  • η= Ae-E/T


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5.

The number of moles of electrons required to deposit 36 g of Al from an aqueous solution of Al(NO3)3 is (At. wt. of Al = 27)

  • 4

  • 3

  • 2

  • 1


6.

Which one of the following statements is not correct?

  • The pH of 1.0 ×10-8 M HCl is less than 7.

  • The ionic product of water at 25°C is 1.0 ×10-14 mol2L-2

  • Cl- is a Lewis acid

  • Bronsted Lowry theory cannot explain the acidic character of AlCl3.


7.

Molar heat capacity (Cp) of water at constant pressure is 75 JK-1mol-1. The increase in temperature (in K) of 100 g of water when 1 kJ of heat is supplied to it is

  • 2.4

  • 0.24

  • 1.3

  • 0.13


8.

Identify A and B in the following reactions

 


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9.

With respect to chlorobenzene, which of the following statements is not correct ?

  • Cl is ortho/para directing

  • Cl exhibits + M effect

  • Cl is ring deactivating

  • Cl is meta directing


10.

Match the following.
  Column I   Column II
A. Acetaldehyde,vinyl alcohol 1. Enantiomers
B. Eclipsed and staggered ethane 2. Tautomers
C. (+)2-butanol,(-)2-butanol 3. Chain isomers
D. Methyl-n-propyl-amine and diethylamine 4. Conformational isomers
    5. Metamers

  • A B C D

    1 4 3 5

  • A B C D

    2 4 1 5

  • A B C D 

    5 1 4 2

  • A B C D

    5 1 3 2


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