Problem 4
Impure glycerine is purified by: (a) Vacuum distillation (b) Simple distillation (c) Steam distillation (d) None of the above
Problem 5
Which of the following shows geometrical isomerism? (a) But-1-ene (b) But-2-ene (c) 2,3-dichlorobutane (d) Ethene
Problem 5
Which of the following has the highest nucleophi-licity? (a) \(\mathrm{F}^{-}\) (b) \(\mathrm{OH}^{-}\) (c) \(\mathrm{CH}_{3}^{-}\) (d) \(\mathrm{NH}_{2}^{-}\)
Problem 5
When pieces of human hair are heated strongly with soda-lime, smell of ammonia can be detected. Which one of the following conclusion can be drawn from this observation? (a) Hair contains amino acids (b) Ammonium salt is present in hair (c) Ammonia is present in the human hair (d) None of the above
Problem 6
The number of optically active isomers of tartaric acid is
Problem 6
Nitrogen in an organic compound can be estimated by: (a) Duma's method only (b) Kjeldahl's method only (c) Both (a) and (b) (d) None of these
Problem 6
The decreasing order of nucleophilicity of HS, \(\mathrm{RCOO}^{-}, \mathrm{RCOOH}\) and \(\mathrm{ROH}\) is: (a) \(\mathrm{RCOO}^{-}>\mathrm{HS}^{-}>\mathrm{RCOOH}>\mathrm{ROH}\) (b) \(\mathrm{HS}^{-}>\mathrm{RCOO}^{-}>\mathrm{RCOOH}>\mathrm{ROH}\) (c) \(\mathrm{HS}^{-}>\mathrm{RCOO}^{-}>\mathrm{ROH}>\mathrm{RCOOH}\) (d) \(\mathrm{RCOO}^{-}>\mathrm{HS}^{-}>\mathrm{ROH}>\mathrm{RCOOH}\)
Problem 7
Which of the following is strongest nucleophile? (a) \(\mathrm{Br}^{-}\) (b) : \(\mathrm{OH}^{-}\) (c) : \(\overline{\mathrm{CN}}\) (d) \(\mathrm{C}_{2} \mathrm{H}_{5} \overline{\mathrm{O}}:\)
Problem 7
In Lassaigne's test for nitrogen, the blue colour is due to the formation of: (a) Ferriferrocyanide (b) Sodium cyanide (c) Potassium fericyanide (d) Sodium ferrocyanide
Problem 7
The compound in which \(\mathrm{C}\) uses only its \(\mathrm{sp}^{3}\) hybrid orbitals for bond formation is (a) \(\mathrm{HCOOH}\) (b) \(\left(\mathrm{NH}_{2}\right)_{2} \mathrm{CO}\) (c) \(\left(\mathrm{CH}_{3}\right)_{3} \mathrm{COH}\) (d) \(\mathrm{CH}_{3} \mathrm{CHO}\)
