Vikram Sarabhai Space Centre Scientist/ Engineer General Chemistry Paper 2016
| 1 | The gas used for artificial ripening of green fruit is
(a) ethylene (b) ehtane (c) carbon dioxide (d) acetylene |
| 2 | One of the following cannot be extracted using carbon
(a) Zinc (b) Aluminium (c) Copper (d) Iron |
| 3 | For certain reaction at 27 degree C, the rate constant increases at the rate of 10% per degree rise in temperature. The activation energy for the reaction is (R=2 cal/mol/K)
(a) 24 kcal/mol (b) 18 kcal/mol (c) 36 kcal/mol (d) 54 kcal/mol |
| 4 | Cellulose is converted to engineering plastic by substituion reaction on hydroxyl groups (like acetylation). This is possible because –
(a) Cellulose molecules are broken down to low molecular weight polyglycoside (b) Acetylation breakes H-bonding of the hydroxyl group which is otherwise responsible for the intractability of cellulose (c) The glycoside ring is broken and generates linear polyhydroy alkane. (d) The glycoside linkage changes from beta to alpha, the latter is more tractable. |
| 5 | The pH of 0.1 molar aqueous solution of oxalic acid assuming 50% dissociation is
(a) 2.6 (b) 2.0 (c) 1.3 (d) 1.0 |
| 6 | Terylene is formed by polymerization of
(a) ethylene glycol and terephthalic acide (b) ethylene diamine and terephthalic acid (c) ethylene and ethylene glycol (d) ethylene glycol and toluene di-siocyanate |
| 7 | The noble gas which does not form clathrates with quinol is
(a) Argon (b) Krypton (c) Xenon (d) Neon |
| 8 | Which of the following is not correct ?
(a) Confidence limits define an interval around the mean value that probably contains the limits (b) determinate errors affect the accuracy of the results (c) Indeterminate errors affect the precision of the results (d) Standard deviation is used as a measure of accuracy |
| 9 | 0.5 g of bleaching powder liberates iodine from KI that reacts with 20 ml of 0.1 N sodium thiosulphate solution. What is the active oxygen content (in weight) in bleaching powder?
(a) 5% (b) 6.2% (c) 3.2% (d) 4.8% |
| 10 | The oxidation state of the metal ion in a catalyst can be detected by
(a) Atomic absorption spectroscopy (b) Gas chromatography (c) HPLC (d) Mossbauer spectroscopy |
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