Assam Polytechnic Admission Test 2019 Paper – Chemistry
Assam Pre Polytechnic Entrance Exam 2019 Paper – Chemistry
| Sr. No. | Question and Answer |
| 1 | Chlorine reacts with saturated hydrocarbons at room temperature in the
(a) Absence of sunlight (b) Presence of sunlight (c) Presence of water (d) Presence of HCl |
| 2 | The heating of ores in absence of air is called
(a) Leaching (b) Smelting (c) Calcination (d) Roasting |
| 3 | Gas used for cooling in refrigerator is
(a) Noble gas (b) Water gas (c) Freon (d) Ozone |
| 4 | The technique used to separate camphor from salt (NaCl) is
(a) Chromatography (b) Distillation (c) Sublimation (d) Crystallization |
| 5 | Which of the following element must present in Amalgam ?
(a) Carbon (b) Mercury (c) Zinc (d) Aluminium |
| 6 | Galvanisation is a method of protecting iron from rusting by coating with a thin layer of
(a) Cr (b) Cu (c) Zn (d) Sn |
| 7 | Which one of the following metals is found in liquid state at room temperature ?
(a) Na (b) Fe (c) Al (d) Hg |
| 8 | An element which is an essential constituent of all organic compounds belongs to
(a) Group 1 (b) Group 14 (c) Group 15 (d) Group 16 |
| 9 | According to Mendeleev’s Periodic Law the elements are arranged in the periodic table in order of
(a) Increasing atomic number (b) Decreasing atomic number (c) Increasing atomic masses (d) Decreasing atomic masses |
| 10 | The concept of stationary orbit was given by
(a) Thomson (b) Rutherford (c) De Broglie (d) Bohr |
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