Vikram Sarabhai Space Centre Scientist/ Engineer Applied Chemistry Paper 2017
| 1 | Which is not used as a neutron moderator ?
(a) Graphite (b) Heavy water (c) Beryllium (d) Cadmium |
| 2 | The pair shows a deviation from the periodic trend of atomic radii
(a) Sm, Tm (b) Eu, Yb (c) Nd, Ho (d) Gd, Lu |
| 3 | Schottky defect exists in
(a) NaCl (b) ZnS (c) AgBr (d) All of the above |
| 4 | Flurocarbons are stable towards hydrolysis, due to the
(a) Presence of fluorine (b) Absence of d orbitals (c) Both a and b (d) Neither a nor b |
| 5 | A metallic crystal is having bcc type stacking pattern. What is the volume percentage of occupied space in the lattice ?
(a) 68% (b) 32% (c) 74% (d) None of the above |
| 6 | Which one of the following reaction does not involve syn-addition to carbon-carbon double bond?
(a) Hydroxylation by OsO4 (b) Epoxidation with peracids (c) Oxymercuration (d) Hydroboration |
| 7 | How many number of isomers (including stereo isomers) are possible for a compound with general name dimethyl cyclobutane?
(a) 4 (b) 5 (c) 6 (d) 7 |
| 8 | Which spectroscopy can be used for the study of free radicals?
(a) NMR spectroscopy (b) Infrared spectroscopy (c) Microwave spectroscopy (d) Electron spin resonance spectroscopy |
| 9 | Which one will give only one signal in NMR spectrum among the following?
(a) Methanol (b) Ethanol (c) Acetone (d) Acetic Acid |
| 10 | In a paper chromatographic separation of Zinc, the front due to Zinc was 10 cm. The solvent front was 20 cm. The retardation factor is
(a) 2 (b) 1 (c) 0.5 (d) 4 |
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