JEE Chemistry Solved Question Paper 2019 | Previous Year Papers | Zigya

Subject

Chemistry

Class

JEE Class 12

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

Advertisement
1.

If solubility product of Zr3(PO4)4 is denoted by Ksp and its molar solubility is denoted by S, then which of the following relation between S and Ksp is correct ?

  • S = Ksp691217

  • S = KSP92919

  • S = Ksp14416

  • S = Ksp21617


2.

The quantum number of four electrons are given below:
I. n = 4 l = 2 ml = -2 ms = -12
II. n = 3 l = 2 ml = 1 ms = +12
III. n = 4 l = 1 ml = 0 ms = +12
IV. n = 3 l = 1 ml = 1 ms = -12

The correct order of these increasing energies will be:

  • IV > III > II > I

  • I > II > III > IV

  • I > III > II > IV

  • IV > II > III > I


3.

For silver, CP( K-1 mol-1) = 23 + 0.01T. If the temperature (T) of 3 moles of silver is raised from 300 K to 1000 K at 1 atm pressure, the value of H will be close to :

  • 21 kJ

  • 62 kJ

  • 16 kJ

  • 13 kJ


4.

The correct order of the spin only magnetic moment of metal ions in the following low spin complexes, [V(CN)6]4-, [Fe(CN)6]4-, [Ru(NH3)6]3+ and [Cr(NH3)6]2+ is

  • V2+  > Cr2+ > Ru3+ > Fe2+

  • V2+ > Ru3+ > Cr2+ > Fe2+

  • Cr2+ > V2+ > Ru3+ > Fe2+

  • Cr2+ > Ru3+ > Fe2+ > V2+


Advertisement
5.

In order to oxidise a mixture of one mole of each of FeC2O4, Fe2(C2O4)3, FeSO4 and Fe2(SO4)3 in acidic medium, the number of moles of KMnO4 required is:

  • 1.5

  • 3

  • 2

  • 1


6.

In the following compounds, the decreasing order of basic strength will be:

  • (C2H5)2NH > NH3 > C2H5NH2

  • (C2H5)2NH > C2H5NH2 > NH3

  • C2H5NH2 > NH3 > (C2H5)2NH

  • NH3 > C2H5NH2 > (C2H5)2NH


7.

The vapour pressures of pure liquids A and B are 400 and 600 mm Hg, respectively at 298 K. On mixing the two liquids, the sum of their initial volumes is equal to the volume of the final mixture. The mole fraction of liquid B is 0.5 in the mixture. The vapour pressure of the final solution, the mole fractions of components A and B in vapour phase, respectively are:

  • 500 mm Hg, 0.4, 0.6

  • 450 mm Hg, 0.4, 0.6

  • 500 mm Hg, 0.5, 0.5

  • 450 mm Hg, 0.5, 0.5


8.

The size of the iso-electronic species Cl-, Ar and Ca2+ is affected by:

  • nuclear charge

  • Prinicpal quantum number of valence shell

  • azimuthal quantum number of valence shell

  • electron-electron interaction in the outer orbitals


Advertisement
9.

Which one of the following equations does not correctly represent the first law of thermodynamics for the given processes involving an ideal gas? (Assume non-expansion work is zero)

  • Isothermal process : q = -w

  • Cyclic process : q = -w

  • Isochoric process : U = q

  • Adiabatic process : U = -w


10.

Diborane (B2H6) reacts independently with O2 and H2O to produce, respectively:

  • B2O3 and H3BO3

  • H3BO3 and B2O3

  • B2O3 and [BH4]-

  • HBO2 and H3BO3


Advertisement