Maharashtra SSC (Class 10) Heat — practice questions
22 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice Maharashtra SSC (Class 10) Heat in the app →How much heat energy is required to raise the temperature of 5 kg of water from 20 °C to 100 °C? (Specific heaThe heat energy absorbed at constant temperature by unit mass of a solid to convert it into the liquid phase iWater shows its minimum volume (maximum density) at a temperature of:The specific latent heat of fusion of ice is 80 cal/g. How much heat is needed to completely melt 50 g of ice Which statement correctly defines the dew point temperature of a sample of air?According to the principle of heat exchange, in an isolated system the heat lost by the hot object is equal toThe phenomenon in which ice converts to liquid under applied pressure and re-converts to ice once the pressureUsing 1 cal = 4.18 J, the energy equivalent of 50 cal of heat in joules is:Three spheres of iron, copper and lead of equal mass are heated to 100 °C and placed on a wax slab. The iron sEqual heat is given to two objects A and B, each of mass 1 g. The temperature of A rises by 3 °C while that ofHow much heat is required to convert 200 g of water at 100 °C completely into steam at 100 °C? (Specific latenAir at 40 °C can hold 49 g of water vapour per kg of dry air, while at 20 °C it can hold only 14.7 g per kg. WA given volume of air actually contains 9 g of water vapour, while 15 g would be needed to saturate it at thatWhy are aquatic plants and animals able to survive in cold regions even when the atmospheric temperature fallsHow much heat must be supplied to convert 10 g of ice at 0 °C into water at 50 °C? (Latent heat of fusion = 80In Hope's apparatus, when water is cooled by the freezing mixture, the lower thermometer T₁ reaches 4 °C firstGoing by the calorie definition, the heat needed to raise the temperature of 1 kg of water by 1 °C (in the 14.A copper sphere of mass 100 g at 100 °C is dropped into 195 g of water at 20 °C held in a copper calorimeter o80 g of steam at 97 °C is released onto an ice slab at 0 °C. Using L(vap) = 540 cal/g, specific heat of water A thermally insulated pot holds 150 g of ice at 0 °C. How much steam at 100 °C must be added so that the finalTo convert 2 kg of water at 20 °C into ice at 0 °C, liquid ammonia is evaporated. Given specific heat of waterA calorimeter of mass 100 g (specific heat 0.1 cal/g °C) contains 250 g of liquid at 30 °C (specific heat 0.4