JEE (Advanced) 2015 Paper-1

Instructions

For the following questions answer them individually

Question 21

The total number of stereoisomers that can exist for M is

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Question 22

The number of resonance structures for N is

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Question 23

The total number of lone pairs of electrons in $$N_2O_3$$ is

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Question 24

For the octahedral complexes of $$Fe^{3+}$$ in $$SCN^-$$ (thiocyanato-S) and in $$CN^-$$ ligand environments, the difference between the spin-only magnetic moments in Bohr magnetons (when approximated to the nearest integer) is [Atomic number of Fe = 26]

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Question 25

Among the triatomic molecules/ions, $$BeCl_5, N_3^-, N_2O, NO_2^+, O_3, SCl_2,ICl_2^-, I_3^-$$ and $$XeF_2$$, the total number of linear molecule(s)/ion(s) where the hybridization of the central atom does not have contribution from the d-orbital(s) is [Atomic number: S = 16, Cl= 17, 1=53 and Xe = 54]

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Question 26

Not considering the electronic spin, the degeneracy of the second excited state (n = 3) of H atom is 9, while the degeneracy of the second excited state of $$H^-$$ is

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Question 27

All the energy released from the reaction $$X \rightarrow Y, \triangle_r G^0 = - 193 kJ mol^{-1}$$ is used for oxidizing $$M^+$$ as $$M^+ \rightarrow M^{3+} + 2e^-, E^0 = -0.25 V$$ Under standard conditions, the number of moles of $$M^+$$ oxidized when one mole of X is converted to Y is [F = 96500 C $$mol^{-1}$$]

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Question 28

If the freezing point of a 0.01 molal aqueous solution of a cobalt(III) chloride-ammonia complex (which behaves as a strong electrolyte) is $$-0.0558 ^\circ_C$$ the numberof chloride(s) in the coordination sphere of the complex is $$[K_f$$ of water = 1.86 K kg $$mol^{-1}$$]

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Question 29

Compound(s) that on hydrogenation produce(s) optically inactive compound(s) is(are)

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Question 30

The major product of the following reaction is

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