Page 1 :
ROY’S ONLINE CLASSES, (Conceptual Teaching), MCQ – 1/ Chemistry /Matter in Our Surroundings, , (Class IX), , Test Paper – MCQ – 1, (Matter in Our Surroundings), , Q1, , Which one of the following statements is not true ?, a. the molecules in a solid vibrate about a fixed position, b. the molecules in a liquid are arranged in a regular pattern, c. the molecules in a gas exert negligibly small forces on each other, except during, collisions, d. the molecules of a gas occupy all the space available, , Q2, , Which of the following are also considered to be the states of matter ?, (i) Plasma (ii) Platelets (iii) BEC (iv) BHC, (a), (i) and (ii), (b), (ii) and (iii), (c), (i) and (iii), (d), (ii) and (iv), One of the following does not undergo sublimation. This one is :, a. iodine, b. sodium chloride, c. ammonium chloride, d. camphor, Which of the following process/processes release heat ?, (i) condensation (ii) vaporisation (iii) freezing (iv) melting, (a) only (i), (b) only (iv), (c) (i) and (iii), (d) (ii) and (iv), If the temperature of an object is 268 K, it will be equivalent to :, a. – 5°C, b. + 5°C, c. 368°C, d. – 25°C, The boiling point of ethane is, – 88°C. This temperature will be equivalent to :, e. 285 K, f., 288 K, g. 185 K, h. 361 K, When heat is constantly supplied by a gas burner with small flame to melt ice, then the temperature of ice, during melting :, (a) increases very slowly, (b) does not increase at all, (c) first remains constant and then increases, (d) increases to form liquid water, When water at 0°C freezes to form ice at the same temperature of 0°C, then it :, (a) absorbs some heat, (b) releases some heat, (c) neither absorbs nor releases heat, (d) (d) absorbs exactly 3.34 × 105 J/kg of heat, When heat is constantly supplied by a burner to boiling water, then the temperature of water during, vaporisation :, (a) rises very slowly, (b) rises rapidly until steam is produced, (c) first rises and then becomes constant, (d) does not rise at all, , Q3, , Q4, , Q5, , Q6, , Q7, , Q8, , Q9, , Roy Sir 9650789723

Page 2 :
ROY’S ONLINE CLASSES, (Conceptual Teaching), MCQ – 1/ Chemistry /Matter in Our Surroundings, , (Class IX), , Q 10, , The latent heat of fusion of ice is :, (a) 33.4 × 105 J/kg, (b) 22.5 × 105 J/kg, (c) 33.4 × 104 J/kg, (d) 2.25 × 104 J/kg, Q 11 The latent heat of vaporisation of water is :, (a) 2.25 × 106 J/kg, (b) 3.34 × 106 J/kg, (c) 22.5 × 104 J/kg, (d) 33.4 × 105 J/kg, Q 12 Which one of the following set of phenomena would increase on raising the temperature ?, (a) diffusion, evaporation, compression of gases, (b) evaporation, compression of gases, solubility, (c) evaporation, diffusion, expansion of gases, (d) evaporation, solubility, diffusion, compression of gases, Q 13 Which of the following represent the suitable conditions for the liquefaction of gases ?, (a) low temperature, low pressure, (b) high temperature, low pressure, (c) low temperature, high pressure, (d) high temperature, high pressure, a) During summer days, water kept in an earthen pot (pitcher) becomes cool because of the phenomenon of, :, a) diffusion, b) transpiration, c) osmosis, d) evaporation, Q 14 On converting 25°C, 38°C and 66°C to Kelvin scale, the correct sequence of temperatures will be :, a) 298 K, 311 K and 339 K, b) 298 K, 300 K and 338 K, c) 273 K, 278 K and 543 K, d) 298 K, 310 K and 338 K, Q 15 The conversion of a solid into vapours without passing through the liquid state is called :, a) vaporisation, b) fusion, c) sublimation, d) freezing, Q 16 The evaporation of water increases under the following conditions :, a) increase in temperature, decrease in surface area, b) increase in surface area, decrease in temperature, c) increase in surface area, rise in temperature, d) increase in temperature, increase in surface area, addition of common salt, Q 17 On converting 308 K, 329 K and 391 K to Celsius scale, the correct sequence of temperatures will be, a) 33°C, 56°C and 118°C, b) 35°C, 56°C and 119°C, c) 35°C, 56°C and 118°C, d) 56°, 119°C and 35° C, Q 18 Which of the following energy is absorbed during the change of state of a substance ?, a) specific heat, b) latent heat, c) heat capacity, d) heat of solution, Q 19 Which of the following factors are responsible for the change in state of solid carbon dioxide when kept, exposed to air ?, i. increase in pressure (ii) increase in temperature (iii) decrease in pressure (iv) decrease in, temperature, a) (i) and (ii), , Roy Sir 9650789723

Page 3 :
ROY’S ONLINE CLASSES, (Conceptual Teaching), MCQ – 1/ Chemistry /Matter in Our Surroundings, , Q 20, , (Class IX), , b) (i) and (iii), c) (ii) and (iii), d) (ii) and (iv), During respiration, glucose and oxygen enter our body cells and waste products carbon dioxide and water, leave the body cells by the process of :, (a) effusion, (b) osmosis, (c) diffusion, (d) plasmolysis, , Roy Sir 9650789723