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WHO
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WHO – World Health Organization
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| 1. Deuterium | (a) |
| 2. Protium | (b) |
| 3. Tritium | (c) |
| 4. α – decay | (d) |
| 5. β – decay | (e) |
| 1. Heat | (a) Joule |
| 2. Thermometer | (b) Heating |
| 3. The SI unit of heat | (c) Temperature |
| 4. Cool a cup of coffee, adding cold milk | (d) Energy |
| 5. gain by heat by a body | (e) thermal equilibrium |
| Alloy | Metals present | Uses |
| 1. Brass | Fe, C, Ni | Statues, Coins |
| 2. Bronze | Al, Mg, Mn, Cu | Aircraft, Pressure cookers |
| 3. Duralumin | Fe, C, Ni, Cr | Cables, Propeller |
| 4. Magnalium | Cu, Sn | Automobile parts, Utensils |
| 5. Stainless steel | Cu, Zn | Scientific instruments, Air craft |
| 6. Nickel steel | Al, Mg | Medals, decorative items |
| i. Cuprite | (a) Halide ore |
| ii. Marble | (b) Oxide ore |
| iii. Fluorspar | (c) Sulphide ore |
| iv. Galena | (d) Carbonate ore |
| Metal | Ore | Chemical formula |
| 1. Copper | Bauxite | $ZnCO _3$ |
| 2. Aluminium | Haematite | $CuFeS _2$ |
| 3. Iron | Copper pyrite | $Fe _2 O _3$ |
| 4. Zinc | Calamine | $Al _2 O _3 \cdot 2 H _2 O$ |
| (i) Gain of electrons | (a) Oxidation reaction |
| (ii) Loss of electrons | (b) Combination reaction |
| (iii) Combustion of coal | (c) Redox reaction |
| (iv) Rusting of iron | (d) Reduction reaction |
| i. 22 g of $CO _2$ | (a) 2 moles |
| ii. 18 g of $H _2 O$ | (b) 4 moles |
| iii. 360 g of Glucose | (c) 0.5 mole |
| iv. 64 g of $CH _4$ | (d) 1 mole |
| 1. Ammeter | (a) To measure resistance |
| 2. Voltmeter | (b) Direction of current |
| 3. Galvanometer | (c) To measure voltage |
| 4. Ohmmeter | (d) To measure current |
| 1. Morphogenesis | (a) Chromaffin cells |
| 2. Bakanae disease | (b) Male sex hormone |
| 3. Tetany | (c) Thymus |
| 4. Testosterone | (d) Gibberella fujikuroi |
| 5. Adrenal medulla | (e) Female sex hormone |
| 6. Thymosin | (f) Callus in tissue culture |
| 7. Estrogen | (g) Muscle spasm |
Position of the object placed infront of a convex lens are given in Column
I. Match them with the natures of the images formed by the convex lens given in column II.
I. Match them with the natures of the images formed by the convex lens given in column II.
