Thermal properties of matter practice · Mixed difficulty

A thermometer is graduated in millimeters. It registers $-3 \mathrm{~mm}$ when the bulb of thermometer is in pure melting ice and $22 \mathrm{~mm}$ when the thermometer is in steam at a pressure of 1 atmosphere. The temperature in ${ }^{\circ} \mathrm{C}$ when the thermometer registers $13 \mathrm{~mm}$ is

2 g of steam condenses when passed through 40g of water initially at $25^\circ C.$ The condensation of steam raises the temperature of water to $54.3^\circ C.$ What is the latent heat of steam.

Assertion (A): A brass disc fits snugly in the hole of the iron plate. To remove the disc the combination must be heated.
Reason (R): The coefficient of linear expansion of brass is less than that of iron

Assertion (A): A man would feel iron or wooden balls equally hot at $98.4^{\circ} \mathrm{F}$
Reason (R): At $98.4^{\circ} \mathrm{F}$ both iron and wood have same thermal conductivity.

The absolute zero temperature in Fahrenheit scale is

On a clear sunny day, an object at temperature T is placed on the top of a high mountain. An identical object at the same temperature is placed at the foot of mountain. If both the objects are exposed to sun-rays for two hours in an identical manner, the object at the top of the mountain will register a temperature

A liquid of mass M and specific heat S is at a temperature 2t. If another liquid of thermal capacity 1.5 times, at a temperature of $\frac{t}{3}$ is added to it, the resultant temperature will be

For one mole of an ideal gas which of the following relation is correct?

Water has maximum density at

A wire of cross sectional area $4\,m{m^2}$ is fixed between two points at ${30^ \circ }C.Y = 2 \times {10^{11}}pa$ and $\alpha = {10^{ - 5}}/\,{\,^ \circ }C$ ; When the temperature falls to ${20^ \circ }C$ , the tension in the string in (newton) is

Statement-I: A thin rod and a thick rod made of same material having same length are given same amount of heat $\theta$. Then the thin rod expands more.
Statement-II: The linear expansion depends upon initial length of the rod only.

A slab consists of two parallel layers of two different materials of same thickness having thermal conductivities ${{K_1}}$ and ${{K_2}}$. The equivalent conductivity of the combination is

If 1 g of ice at $0^{\circ} \mathrm{C}$ is added to 5 g of water at $10^{\circ} \mathrm{C}.$ If the latent heat of ice is $80 \mathrm{~cal} / \mathrm{g},$ the final temperature of the mixture is

The temperature of the two ends A and B of a rod of length 25 cm and circular cross section are $100^\circ C$ and $0^\circ C$ respectively. In the steady state, the temperature at a distance of 10cm from end B (ignore loss of heat from curved surface of the body is)

Red, yellow $\&$ black color objects are heated up to same temperature and taken dark room. Which will glow brightest

5 g of ice at ${0^0}C$ is dropped in a beaker containing 20 g of water at ${40^0}C$. The final temperature will be

In which case the thermal conductivity increases from left to right

For rate of radiations (power) to be equal with a sphere and cube at same temperature [acting as perfect black bodies] The ratio of radius of sphere to side length of cube should be

In determining the temperature of a distant star, one makes use of

Ratio among linear expansion coefficient $(\alpha )$ areal expansion coefficient $(\beta )$ and volume expansion coefficient $(\gamma )$ is

Two iron rods have their lengths in the ratio 5:3 and diameters in ratio 2:1 when the rods are heated from ${30^ \circ }C$ to ${100^ \circ }C$the ratio of their linear expansions is

A correct thermometer in Fahrenheit is introduced in a water bath along with a Celsius thermometer. The reading observed are ${86^ \circ }F$ and ${32^ \circ }C$ the correction to be made to the Celsius reading will be

A liquid cools down from ${70^0}C$ to ${60^0}C$ in 5 minutes . The time taken to cool it from ${60^0}C$ to ${50^0}C$ will be

Which of the following statements is true/correct

Assertion: A fluid in vacuum expands such that it changes to gaseous state. Its temperature decreases.
Reason: It uses its internal energy as heat of vaporization.

When the room temperature becomes equal to the dew point, the relative humidity of the room is

Four pieces of iron heated in a furnace to different temperatures show different colours listed below. Which one has the highest temperature

Air is filled at $60^{\circ} \mathrm{C}$ in a vessel of open mouth. The vessel is heated to a temperature $T$ so that $1 / 4^{\text {th}}$ part of air escapes. Assuming the volume of the vessel remaining constant, the value of $T$ is

Mercury is often used in clinical thermometers. Which one of the following properties of mercury is not a reason for this?

Which one of the following processes depends on gravity