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Q.1, (1), , (2), , (3), , (4), , (5), , (B) Choose and write the correct option:, , The specific heat capacity of is maximum., (a) Mercury (b) Copper, (c) Water (d) Iron, , If temperature of water increases from 1°C to, 3°C, the density of water 000000000..., , (a) remains the same (b) decreases, , (c) increases (d) fluctuates, , Aquatic plants and animals can survive in cold, region because of ...., , (a) humidity, , (b) dew point, , (c) heat capacity, , (d) Anomalous behaviour of water, , Water is such a substance which ..0..... at OPC, upto 4°C, , (a) expands on heating, , (b) contracts on heating, , (c) contracts on cooling, , (d) remains unchanged, , If temperature of water is lowered from 4°C to, 3°CG; its volume, , (a) increases (b) decreases, (c) remains the same (d) fluctuates

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(6), , (7), , (8), , (9), , The specific heat capacity is measured in C.G.S., PE ecerrecesrmenenens, , (a) cal (b) kcal, , (c) cal/g°C (d) joule/kg°C, , At dew point, the relative humidity is 0., (a) 100% (b) 10%, , (c) 60% (d) 50%, , If the pressure is applied on ice, its melting point, , (a) decreases (b) increases, (c) remains the same (d) fluctuates, , The specific heat capacity of water is .., kcal/kg°C, , (a) 10 (b) 1.0, (c) 1.5 (d) 0.5

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10) Why do street ice cream vendors add salt their, , 11), , 12), , 13), , freezing mixture intermittently?, (a) to increase the melting point of the freezing, mixture., , (b) to maintain the melting point of the freezing, mixture as constant., , (c) to reduce the melting point of the freezing, mixture, , (d) to reduce the weight of the freezing mixture., , Heat needed to raise the temperature of 1 kg of, water from 14.5°C to 15.5°C is ____. ,, , (a) 4180J (b) 103J, (c) lecal (d) 4180 cal, Heat is absorbed when. ..........., , (a) water is converted into vapour, (b) water is converted into ice, , (c) steam is converted into water, (d) all of these, , Heat absorbed when 1 g of ice melts at 0°C to form, 1g of water at the same temperature is ..... cal, , (a) 80 (b) 800, (c) 540 (d) 54

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1 4) Wax layer, , , , Lead, Copper, , Iron, , , , , , , , With reference to the above diagram, which of, the following relation is incorrect?, , (2) Chon? Cropper (BY Cosgpr Cres, , (C) Cyan >” Creaa (d) C..4? Cope, 15) which of the following is a correct relation?, , (a) 4.18 calories = 1 joule, , (b) 1 calories = 4.18 joule, , (c) 10’ calories = 1 joule, , (d) 1 calories = 10’ joule