JEE Chemistry Solved Question Paper 2004 | 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 one electron species having ionization energy of 54.4 eV is :

  • H

  • He+

  • B4+

  • Li2+


2.

The correct set of quantum numbers (n, and m respectively) for the unpaired electron of chlorine atom is :

  • 2, 1, 0

  • 2, 1, 1

  • 3, 1, 1

  • 3, 2, 1


3.

Which of the following contains maximum number of molecules ?

  • 200 cc of NH3 at STP

  • 100 cc of CO2 at STP

  • 150 cc of N2 at STP

  • 500 cc of SO2 at STP


4.

The numerical value of Nn (where, N is the number of molecules in a given sample of gas and n is the number of moles of the gas) is :

  • 8.314

  • 6.02 × 1023

  • 0.0821

  • 1.66 × 10-19


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5.

The mass of 11.2 L of ammonia gas at STP is:

  • 8.5 g

  • 85 g

  • 17 g

  • 1.7 g


6.

Consider the ions : K+, S2-, Cl- and Ca2+. The radii of these ionic species follow the order

  • Ca2+ > K+ > Cl- > S2-

  • Cl- > S2- > K+ > Ca2+

  • S2- > Cl- > K+ > Ca2+

  • Ca2+ > S2- > Cl- > Ca2+


7.

Identify the correct statement from below, concerning the structure of CH2 = C = CH2

  • The molecule is planar

  • One of the three carbon atoms is in an sp3 hybridized state

  • The molecule is non-planar with the two -CH2 groups being in planes perpendicular to each other

  • All the carbon atoms are sp-hybridized


8.

Molecular shapes of SF4, CF4, XeF4 are :

  • the same with 2, 0 and 1 lone pair of electron respectively

  • the same with 1, 1 and 1 lone pair of electrons respectively

  • different with 0, 1 and 2 lone pair of electrons respectively

  • different with 1, 0 and 2 lone pair of electrons respectively


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9.

The enthalpy of a monoatomic gas at T Kelvin is :

  • 72RT

  • 52RT

  • 12RT

  • 12


10.

The enthalpy change for the transition of liquid water to steam is 40.8 kJ mol-1 at 373 K. What is the entropy of vaporisation of water ?

  • 209.4

  • 109.4

  • -109.4

  • -209.4


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