Chapter Test: Thermal Properties of Matter - 2 JEE Physics Free MCQs

2 kg ice at – 20ºC is mixed with 5 kg water at 20ºC in an insulating vessel having negligible heat capacity. Calculate the final mass of water remaining in container.

Given sp. heat water = 4.186 kJ K^–1 kg^–1

sp. heat Ice = 2.092 kJ K^–1 kg^–1

Latent heat of fusion of ice = 334.7 kJ Kg^–1

Ice at 0ºC is added to 200gm of water initially at 70°C in a vacuum flask. When 50 gm of ice has been added and has all melted, the temperature of flask and contents is 40ºC, When a further 80 gm of ice is added and has all melted, the temperature of whole becomes 10ºC. Neglecting heat lost to surroundings the latent heat of fusion of ice is :

Steam at 100ºC is passed into 1.1 kg of water contained in a calorimeter of water equivalent 0.02 kg at 15ºC till the temperature of the calorimeter and its contents rises to 80ºC. The mass of the steam condensed in kg is -

If two sphare having same radius but the ratio of their specific heat is 2 : 1 and the ratio of their density is 1 : 4 then the ratio of their heat capacity is -

The steam point and ice point of a mercury thermometer are marked as 80º and 10º. At what temperature on centigrade scale the reading of this thermometer will be 59º ?

On an X temperature scale, water freezes at –125ºX and boils at 375ºX. On a Y temperature scale water freezes at –70ºY and boils at –30ºY The value of temperature on X-scale equal to the temperature of 50ºY on Y-scale is ..............ºX.

If x grams of steam at 100ºC becomes water at 100ºC which converts y grams of ice at 0ºC into water at 100ºC, then the ratio x/y will be –

The weight of a hammer is 0.5 kg. It falls at the ratio of 10 strokes per minute on a piece of lead of mass 0.03 kg at 25ºC with a velocity 1.0 m/s. The number of strokes of hammer required to melt the lead piece will be (melting point of lead = 325ºC, specific heat of lead = 0.03 cal/gm-ºC and latent heat = 6 kcal/kg) -

A beaker is completely filled with water at 4ºC. It will overflow -

A kettle with 2 litre water at 27°C is heated by operating coil heater of power 1 kW. The heat is lost to the atmosphere at constant rate 160J/sec, when its lid is open. In how much time will water heated to 77°C with the lid open ? (specific heat of water = 4.2 kJ/ kg)

In an energy recycling process, X g of steam at 100°C becomes water at 100°C which converts Y g of ice at 0°C into water at 100°C. The ratio of X/Y will be -

A temperature difference of 5°C on Celsius scale  corresponding to the following temperature difference in the Fahrenheit scale -

An electrically heated coil is immersed in a calorimeter containing 360 gm of water at 10ºC. The coil consumes energy at the rate of 90W. The water equivalent of calorimeter & coil is 40 gm. The temperature of water after 10 minutes is-

Assertion (A) : Melting of solid causes no change in internal energy

Reason (R) : Specific latent heat is the heat required to melt a unit mass of solid

Two liquids A and B are at 32°C and 24°C. When mixed in equal masses the temperature of the  mixture is found to be 28°C. Their specific heats are in the ratio of -

A liquid is being converted into vapours at its bp; the specific heat of liquid at this temperature will be –

200 g of a solid ball at 20ºC is dropped in an equal amount of water at 80ºC. The resulting temperature is 60ºC. This means that specific heat of solid is -

Heat required to melt 1 gm of ice is 80cal. A man melts 60 gms of ice by chewing in 1 min. His power is -

A metal sphere of radius r and specific heat S is rotated about an axis passing through its centre at a speed of n rotations per second. It is suddenly stopped and 50 % of its energy is used in increasing its temperature. Then the rise in temperature of the sphere is -

An iceberg is floating partially immersed in sea water. The density of sea water is 1.03 g cm^–3 and that of ice is 0.92 g cm^–3. The approximate percentage of total volume of iceberg above the level of sea water is -

Which of the curves in figure represents the relation between Celsius and Fahrenheit temperature-

A block of mass 2 kg is kept at temperature 200ºC is put into a calorimeter of water equivalent 40 gm contain 960 gm of water at 40ºC. The resulting temperature of mixture is (Sp. heat of block = 0.1 Cal/gm-ºC)

When 10 gm of ice at –20 ºC is mixed with 10 gm of water at 50 ºC, the amount of ice melted is -

A calorimeter (water equivalent 50 gm) contains 20 gm ice at – 20ºC. Find the amount of steam at 100ºC require to just melt all the ice.(S_w= 1 cal/gm-ºC, S_ice = 0.5 cal/gm-ºC, L_f = 80 cal/gm, L_v = 540 cal/gm)

Four cylindrical rods of different radii and lengths are used to connect two heat reservoirs at fixed temperatures t₁ and t₂ respectively. From the following pick out the rod which will conduct the maximum quantity of heat:

A steel tape is calibrated at 20° C. A piece of wood is being measured by steel tape at 10°C and reading is 30 cm on the tape. The real length of the wood is:

The coefficient of liner expansion of a cubical crystal along three mutually perpendicular direction is  and . What is the coefficient of cubical expansion of crystal?

Relationship for converting the Fahrenheit and Celsius scales is

When water is heated from 0° C to 20° C its volume: