Vikram Sarabhai Space Centre Scientist/ Engineer Chemistry Paper 2018
| 1 | The size of the d orbitals in Si, P, S and Cl follows the order
(a) Si < P < S < Cl (b) Si > P > S > Cl (c) P > S > Si > Cl (d) Cl > P > S > Si |
| 2 | Among the following, which is the strongest reducing agent ?
(a) HF (b) HCl (c) HBr (d) HI |
| 3 | Out of the various allotrpes of phosphorous, the system to which white phosphorous P4 belongs is
(a) closo system (b) nido system (c) arachno system (d) hypho system |
| 4 | The reagent that can differentiate pentanal and pentan-3-one is
(a) Schiffs reagent (b) NaHSO3 (c) NaCN/HCN (d) 2,4-dinitrophenyl hydrazine |
| 5 | Mass spectrum is recorded as
(a) Molecular mas against m/z (b) Relative intensity against m/z (c) Moelcular mass against charge (d) Charge against m/z |
| 6 | The monomers M1 and M2 undergo polymerization to yield Nylon 6,6 polymer, with the elimination of water molecules. M1 is hexamethylenediamine while the M2 can be
(a) Sebacic acide (b) Malic acid (c) Picric acid (d) Adipic acid |
| 7 | Donnan Membrane equilibrium is related to
(a) Molar mass of charged macromolecules (b) Tg of polymers (c) Conductivity of polymers (d) None of these |
| 8 | Number average molecular mass of polymer is determined by
(a) Light scattering and ultracentrifuge method (b) Osmotic pressure (c) Depression of freezing point (d) Elevation of boiling point |
| 9 | Thermodynamics of polymer solutions is best described in
(a) Mark-Hauwink equation (b) Carothers theory (c) Flory-Huggins theory (d) None of these |
| 10 | |
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