Bihar SBTE Polytechnic Diploma first year May 2019 Basic Chemistry for Sem I & II General
| Sr. No. | Questions with options |
| 1 | The number of radial nodes for 3p orbital is
(a) Zero (b) 1 (c) 2 (d) 3 |
| 2 | The percentage of oxygen in air by weight
(a) 78% (b) 23% (c) 21% (d) None of these |
| 3 | Neoprene is a polymer of
(a) Isoprene (b) Chloroprene (c) Butadiene (d) None of these |
| 4 | Correct order for first ionization potential is
(a) N<O<F (b) N>O>F (c) N>O<F (d) None of these |
| 5 | Teflon is obtained by the polymerization of
(a) Monofluorothene (b) Difluroethene (c) Trifluoroethylene (d) Tetrafluroethylene |
| 6 | The process used for purification of Al is
(a) Hall’s process (b) Serpeck’s process (c) Bacyer’s process (d) Hoopes process |
| 7 | Number of pi bond in acetylene is
(a) 1 (b) 2 (c) 3 (d) 4 |
| 8 | Blister copper is
(a) Ore of copper (b) Copper containing some impurity (c) Pure copper (d) Alloy of copper |
| 9 | The bond angle in water molecule is nearly
(a) 104.5 degree (b) 109 degree (c) 120 degree (d) 180 degree |
| 10 | How much chlorine will be liberated on passing one ampere current for 30 minute through NaCl solution?
(a) 0.66 mole (b) 0.33 gm (c) 0.66 gm (d) None of these |
| 11 | Which of the following contains Ister
(a) Nylon (b) Nylon-6 (c) Dacron (d) None of these |
| 12 | Solder is an alloy of
(a) Cu and Zn (b) Cu and Sn (c) Pb and Ni (d) Pb and Sn |
| 13 | Which of the following polymers is prepared by condensation polymerization
(a) Nylon 66 (b) Teflon (c) Rubber (d) PVC |
| 14 | In 1984, the Bhopal gas tragedy took place because methyl isocyanate reacted with
(a) CO2 (b) NH3 (c) H2O (d) None of these |
| 15 | Oxidation number of Cr in H2CrO8
(a) +2 (b) +5 (c) +6 (d) 14 |
| 16 | According to Aufbau principle, the correct order of energy of 3d, 4s and 4p orbital is
(a) 4p<3d<4s (b) 4s<4p<3d (c) 3d<4p<4s (d) 4s<3d<4p |
| 17 | Eutrophication causes due to presence of
(a) Sulphate (b) Chloride (c) Phosphate (d) None of these |
| Data Collected By – K. Jeyanthi | |
| Published On – 22nd April 2022 | |
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