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VITEEE 2018 :: Chemistry :: General questions




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26.

Which one of the following has an optical isomer?

(en = ethylenediamine)


A) $\left[Zn(en) (NH_{3})_{2}\right]^{2+}$

B) $\left[Co(en)_{3}\right]^{3+}$

C) $\left[Co(H_{2}O)_{4}(en)\right]^{3+}$

D) $\left[Zn(en)_{2}\right]^{2+}$



27.

Which of the following is best method for reducing 3-bromopropanal to 1 -bromopropane


A) Wolf-Kishner reduction

B) Clemmenson reduction

C) Either (a) or (b)

D) Stephen's reduction



28.

Calculate enthalpy change for the change

8S(g) → S8(g), given that

H2S2(g) → 2H(g) + 2S(g)

                                 ΔH = 239.0 kcal mol-1

H2S(g) → 2H(g) + S(g)

                                 ΔH = 175.0 kcal mol-1


A) + 512.0 k cal

B) - 512.0 k cal

C) +508.0 k cal

D) - 508.0 k cal



29.

The molecular formula of diphenyl methane 1842021222_images.png 

is C13H12. How many structural isomers are possible when one of the hydrogens is replaced by a chlorine atom?


A) 6

B) 4

C) 8

D) 7



30.

For which one of the following systems at equilibrium, at constant temperature will the doubling of the volume cause a shift to the right?


A) $H_{2}(g)+Cl_{2}(s)\rightleftharpoons2HCl(g)$

B) $2CO(g)+O_{2}(g)\rightleftharpoons 2CO_{2}(g)$

C) $N_{2}(g)+3H_{2}(g)\rightleftharpoons2NH_{3}(g)$

D) $PCl_{5} (g)\rightleftharpoons PCl_{3} (g)+ Cl_{2}(g)$



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