JEE (Advanced) 2015 Paper-2

Instructions

For the following questions answer them individually

Question 21

The number of hydroxyl group(s) in Q is

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Question 22

Among the following, the number of reaction(s) that produce(s) benzaldehyde is

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Question 23

In the complex acetylbromidodicarbonylbis(triethylphosphine)iron(II), the number of $$Fe^- C bond(s) is

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Question 24

Among the complex ions, $$[Co(NH_2-CH_2-CH_2-NH_2)_2Cl_2]^+, [CrCl_2(C_2O_4)_2]^{3-}, [Fe(H_2O)_4(OH)_2]^+, [Fe(NH_3)_2(CN)_4]^-, [Co(NH_2-CH_2-CH_2-NH_2)_2(NH_3)Cl]^{2+}$$ and $$[Co(NH_3)_4(H_2O)Cl]^{2+}$$, the number of complex ion(s) that show(s) cis-trans isomerism is

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Question 25

Three moles of $$B_2H_6$$ are completely reacted with methanol. The number of moles of boron containing product formed is

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Question 26

The molar conductivity of a solution of a weak acid HX (0.01 M) is 10 times smaller than the molar conductivity of a solution of a weak acid HY (0.10 M). If $$\lambda_X^0 \approx \lambda_Y^0$$, the difference in their $$pK_a$$ values, $$pK_a (HX) - pK_a (HY)$$, is (consider degree of ionization of both acids to be $$\ll 1$$

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Question 27

A closed vessel with rigid walls contains 1 mol of $$_{92}^{238}U$$ and 1 mol of air at 298 K. Considering complete decay of $$_{92}^{238}U$$ to $$_{82}^{206}Pb,$$ the ratio of the final pressure to the initial pressure of the system at 298 K is

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Question 28

In dilute aqueous $$H_2SO_4$$, the complex diaquodioxalatoferrate(II) is oxidized by $$MnO_4^-$$. For this reaction, the ratio of the rate of change of $$[H^+]$$ to the rate of change of $$MnO_4^-$$ is

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Question 29

In the following reactions, the product S is

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Question 30

The major product U in the following reactions is

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