Problem 8
Which of the following is the strongest nucleophile? (a) \(\mathrm{NH}_{2}^{-}\) (b) \(\mathrm{CH}_{3}-\mathrm{CH}_{2}^{-}\) (c) \(\mathrm{HC} \equiv \mathrm{C}^{-}\) (d) \(\mathrm{H}_{2} \mathrm{C}=\mathrm{CH}^{-}\)
Problem 8
Number of isomers which can be obtained theoretically from monochlorination of 2 -methylbutane are (a) 2 (b) 3 (c) 4 (d) 5
Problem 8
Carbon and hydrogen are estimated by: (a) Leibig method (b) Duma's method (c) Carius method (d) Kjeldahl's method
Problem 9
Among the following, the strongest nucleophiles is: (a) \(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{SH}\) (b) \(\mathrm{CH}_{3} \mathrm{COO}^{-}\) (c) \(\mathrm{CH}_{3} \mathrm{NH}_{2}\) (d) \(\mathrm{NCCH}_{2}^{-}\)
Problem 9
An organic molecule necessarily shows optical activity if it (a) Is non-superimposable on its mirror image (b) Is superimposable on its mirror image (c) Contains asymmetric carbon atoms (d) Is non-polar
Problem 9
Aniline is usually purified by: (a) Chromatography technique (b) By addition of oxalic acid (c) Fractional crystallization (d) Steam distillation
Problem 10
Phenol is more reactive than benzene towards eletrophillic substitution due to: (a) Strong mesomeric effect (b) Hyperconjugative effect (c) Inductive effect only (d) Hydrogen bonding
Problem 10
The C-H bond distance is longest in (a) \(\mathrm{C}_{2} \mathrm{H}_{2}\) (b) \(\mathrm{C}_{2} \mathrm{H}_{4}\) (c) \(\mathrm{C}_{2} \mathrm{H}_{6}\) (d) \(\mathrm{C}_{2} \mathrm{H}_{2} \mathrm{Br}_{2}\)
Problem 11
Molecular mass of a volatile substance may be obtained by: (a) Liebig's method (b) Kjeldhal's method (c) Duma's method (d) Victor Meyer's method
Problem 11
How many structural isomers of \(\mathrm{C}_{4} \mathrm{H}_{10} \mathrm{O}\) are ethers? (a) 1 (b) 2 (c) 3 (d) 4
