Miscellaneous Test 15 (chemistry) Welcome to your Miscellaneous Test 15 (chemistry) Name Email 1.Which of the following statements best explains the process of sublimation? (a) The process of water movement through a plant and its evaporation from aerial parts. (b) The process by which water vapour in the air is changed into liquid water. (c) The process by which water changes from a liquid to a gas or vapour. (d) The transition of a substance directly from the solid to the gas phase without passing None 2.Burning of coal is a ______ reaction. (a) displacement (b) decomposition (c) combination (d) double displacement None 3.How many pollutants are included to measure the Air Quality Index in India? (a) 4 (b) 8 (c) 6 (d) 12 None 4.When the process of formation of hydrogen by passing steam over red hot iron is presented in the form of a balanced chemical equation, then the number of water molecules on the left-hand side of the equation are ______. (a) three (b) two (c) one (d) four None 5.Which of the following is one of the six pollutants under Kyoto Protocol regulations? (a) Chlorine (b) Phosgene (c) Carbon monoxide (d) Perfluorocarbons None 6.Which of the following elements has the highest thermal conductivity of any element and the highest light reflectance? (a) Aluminium (b) Copper (c) Brass (d) Silver None 7. Zinc + Sulphuric acid → Zinc sulphate + ______ (a) Hydrogen (b) Nitrogen (c) Carbon (d) Chlorine None 8.To which group of organic molecules does 'Monosaccharides' belong? (a) Lipids (b) Nucleic acids (c) Carbohydrates (d) Proteins None 9. ‘PVC’ is a high strength thermoplastic material widely used in applications, such as pipes, medical devices, wire and cable insulation. What is the full form of PVC? (a) Polyvinyl Carbazole (b) Polyvinyl Chloride (c) Polyvinyl Calcium (d) Polyvinyl Carbonate None 10.Which of the following has a tetragonal crystal system? (a) Potassium nitrate (b) Zinc oxide (c) Cadmium sulphide (d) Calcium sulphate None 11.Chemicals called ______ link to form proteins. (a) oxalic acids (b) amino acids (c) citric acids (d) nitric acids None 12.Which of the following is a weak electrolyte? (a) Sodium chloride (b) Calcium chloride (c) Ethanoic acid (d) Magnesium sulphate None 13.Which of the following gases is naturally formed via the anaerobic decay of phosphorus-containing organic matter? (a) Perchloryl fluoride (b) Phosgene (c) Phosphine (d) Phosphorus pentafluoride None 14.What is the boiling point at standard atmospheric pressure at sea level and 45° latitude of water on the Celsius scale? (a) 150°C (b) 100°C (c) 50°C (d) 200°C None 15.Topaz is a ______ of fluorine and aluminum. (a) sulphate (b) phosphate (c) carbonate (d) silicate None 16. ______ solids are formed by the three-dimensional arrangements of cations and anions bound by strong coulombic (electrostatic) forces. (a) Metallic (b) Molecular (c) Ionic (d) Covalent None 17.In a galvanic cell, the half-cell in which oxidation takes place is called ______ and it has a negative potential with respect to the solution. (a) cathode (b) anode (c) diode (d) triode None 18.What is the meaning of the Greek origin word, ‘Elektron’? (a) Charge (b) Negative (c) Amber (d) Ebonite None 19.. What is the number of hydrogen atoms in a molecule of calcium bicarbonate? (a) 2 (b) 1 (c) 4 (d) 0 None 20.Iron nails become ______ after being dipped in copper sulphate solution. (a) greenish (b) bluish (c) brownish (d) greyish None 21.______ is the inflammatory compound in pepper spray. (a) CFC (b) curcumin (c) gingerol (d) capsaicin None 22. NPK is a: (a) Fertilizer used for increasing fertility of soil (b) Medicine used to control pests (c) Brand of sprinkler for irrigation (d) Sanitizer used to clean dusty leaves None 23. In which process is a protective zinc coating applied on iron to prevent it from rusting? (a) Galvanisation (b) Annealing (c) Welding (d) Smelting None 24.Name the densest stable element known on earth. (a)Rhodium (b)Osmium (c)Aluminium (d)Tungsten None 25.Which of the following is used for removing permanent hardness of water? (a)Lime (b)Washing soda (c)Bleaching powder (d)Baking soda None Time's up
