Bihar SBTE Polytechnic Diploma first year Dec 2019 Basic Chemistry for Sem I & II General
| Sr. No. | Questions with options |
| 1 | Iron becomes passive on treatment with Conc. HNO3. It is due to deposition of oxide formation. Which is the following is correct for layer?
(a) Protective and porous (b) Protective and non porous (c) Non protective and porous (d) None protective and non porous |
| 2 | In hydrogen atom the energy of first and excited stte is -3.4ev. Find out K.E of the same orbit of H-atom
(a) -3.4 ev (b) +3.4 ev (c) -6.8 ev (d) +6.8 ev |
| 3 | Which of the following has highest ionic character
(a) MgCl2 (b) CaCl2 (c) BaCl2 (d) BeCl2 |
| 4 | What weight of copper (63.5) deposits when two Faraday of electricity is passed through CuSO4 solution
(a) 63.5gm (b) 31.75gm (c) 127 gm (d) None of these |
| 5 | Which of the following transition metal is synthetic
(a) Mn (b) Pm (c) Te (d) Se |
| 6 | In the extraction of iron from red haematite the limestone acts as
(a) Reducing agent (b) Flux (c) Slag (d) Gangue |
| 7 | Depletion of ozone layer causes
(a) Blood cancer (b) Breast cancer (c) Lung cancer (d) Skin cancer |
| 8 | Which the following is polyamide polymer
(a) Dacron (b) Orlon (c) Rayon (d) Nylon |
| 9 | Smelting involves reduction of metal oxide with
(a) C (b) CO2 (c) Mg (d) Al |
| 10 | Neoprene is the polymer of
(a) Isoprene (b) Butadiene (c) Chloroprene (d) None of these |
| 11 | Which of the following on heating does NOT give oxygen
(a) Zn (NO3)2 (b) NaNO3 (c) NH4NO3 (d) None of these |
| 12 | Ozone depletion over Antractica takes place due to
(a) Acrolein (b) Feroxy acetyl nitrate (c) Chlorine nitrate (d) None of these |
| 13 | In which of the following molecule is present both ionic bond and covalent bond
(a) KCl (b) H2O (c) CaC2 (d) HCN |
| 14 | Which of the following is present in solder
(a) Cu + Zn (b) Cu + Sn (c) Pb + Sn (d) None of the above |
| 15 | The number of radial node in 4d subshell is
(a) 0 (b) 1 (c) 2 (d) 3 |
| 16 | Copper sulphate solution on treatment with excess of KI gives white precipitate. The white precipitate is
(a) Cu2I2 (b) CuI2 (c) CuSO4 (d) I2 |
| 17 | Which of the following is secondary pollutant
(a) CO2 (b) SO2 (c) PAN (d) None of these |
| 18 | What is the shape of ammonia
(a) Linear (b) Triangular planar (c) Tetrahedral (d) None of the above |
| Data Collected By – K. Jeyanthi | |
| Published On – 22nd April 2022 | |
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