Thermal properties of matter practice · Mixed difficulty

Statement-I: When hot water is poured in a thick glass tumbler then the tumbler breaks.
Statement-II: Glass is a bad conductor of heat

$10 \mathrm{~gm}$ of ice at $-20^{\circ} \mathrm{C}$ is dropped into a calorimeter containing $10 \mathrm{~gm}$ of water at $10^{\circ} \mathrm{C}$. The specific heat of water is twice that of ice. Neglect heat capacity of the calorimeter. When equilibrium is reached, the calorimeter will contain

There is formation of layer of snow $x\,\,cm$ thick on water, when the temperature of air is $- {0^0}C$ (less than freezing point). The thickness of layer increases from $x$ to $y$ in the time $t$, then the value of $t$ is given by

Statement A: Woolen clothes keep the body warm in winter
Statement B: Air is a bad conductor of heat

Assertion: When hot water is poured in a beaker of thick glass, the beaker cracks.
Reason: Outer surface of the beaker expands suddenly.

Triple Point of Water is

A metallic ball has spherical cavity at its centre. If the ball is heated, what happens to the cavity?

Assertion: The temperature at which Centigrade and Fahrenheit thermometers read the same is $-40^{\circ}$.
Reason: There is no relation between Fahrenheit and Centigrade temperature.

Heat travels through vacuum by

Of the following thermometers, the one which can be used for measuring a rapidly changing temperature is a

According to Wein's displacement law

The lengths and radii of two rods made of same material are in the ratios 1:2 and 2:3 respectively. If the temperature difference between the ends for the two rods be the same, then in the steady state, the amount of heat flowing per second through them will be in the ratio

Assertion: The coefficient of volume expansion has dimension $\mathrm{K}^{-1}$.
Reason: The coefficient of volume expansion is defined as the change in volume per unit volume per unit change in temperature.

Due to the change in mains voltage, the temperature of an electric bulb rises from $3000 \mathrm{~K}$ to $4000 \mathrm{~K}$. What is the percentage rise in electric power consumed?

The equation for an ideal gas is $PV = RT,$ where $V$ represents the volume of

The surface temperature of the sun is

How many reference temperature/s is/are used to make the Kelvin temperature scale?

In Boyle’s law what remains constant

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.

The length of a steel rod exceeds that of a brass rod by $5 \mathrm{~cm}$. If the difference in their lengths remains same at all temperatures, then the length of brass rod will be: respectively)

If the radius of a star is R and it acts as a black body, what would be the temperature of the star, in which the rate of energy production is Q (σ stands for stefan’s constant)

Density of substance at ${0^0}C$ is 10 g/cc and at ${100^0}C$, its density is 9.7 g/cc. The coefficient of linear expansion of the substance is

Statement I: The reflection coefficient of a black
body is zero.

Statement II: Black body absorbs all the
radiation incident on it.

The cause of Fraunhoffer lines is

In anomalous expansion of water, at what temperature, the density of water is maximum?

Statement 1: Latent heat of fusion of ice is $336000 \mathrm{~Jkg}^{-1}$
Statement 2: Latent heat refers to change of state without any change in temperature.

A blue glass when heated will glow with

Substance having very small coefficient of linear expansion, among the following is

A spherical body of emissivity $e=0.7$ and surface area $A$ is Placed inside a perfect black body maintained at temperature $T$, then energy radiated per second by black body will be

The saturation vapour pressure of water at ${100^0}C$ is