KCET (DEMO) PHYSICS THERMODYNAMICS PAPER

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

A rod of length 20 cm is made of metal. It expands by 0.075 cm when its temperature is raised from $$0^{\circ} \mathrm{C}$$ to $$100^{\circ} \mathrm{C}$$. Another rod of a different metal $$B$$ having the same length expands by 0.045 cm for the same change in temperature. A third rod of the same length is composed of two parts, one of metal $$A$$ and the other of metal $$B$$. This rod expands by 0.060 cm for the same change in temperature. The portion made of metal $$A$$ has the length

Steam is passed into 22 gm of water at $$20^{\circ} \mathrm{C}$$. The mass of water that will be present when the water acquires a temperature of $$90^{\circ} \mathrm{C}$$ (Latent heat of steam is $$540 \mathrm{cal} / \mathrm{gm}$$ ) is

The graph $$A B$$ shown in figure is a plot of temperature of a body in degree celsius and degree Fahrenheit. Then

The graph shows the variation of temperature ( $$T$$ ) of one kilogram of a material with the heat (H) supplied to it. At $$O$$, the substance is in the solid state. From the graph, we can conclude that

A block of ice at $$-10^{\circ} \mathrm{C}$$ is slowly heated and converted to steam at $$100^{\circ} \mathrm{C}$$. Which of the following curves represents the phenomenon qualitatively

The portion $$A B$$ of the indicator diagram representing the state of matter denotes

The figure given below shows the cooling curve of pure wax material after heating. It cools from $$A$$ to $$B$$ and solidifies along $$B D$$. If $$L$$ and $$C$$ are respective values of latent heat and the specific heat of the liquid wax, the ratio $$L / C$$ is

A solid substance is at $$30^{\circ} \mathrm{C}$$. To this substance heat energy is supplied at a constant rate. Then temperature versus time graph is as shown in the figure. The substance is in liquid state for the portion (of the graph)

The variation of density of water with temperature is represented by the

If a graph is plotted taking the temperature in Fahrenheit along $$Y$$-axis and the corresponding temperature in Celsius along the $$X$$-axis, it will be a straight line

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

A student takes 50 gm wax (specific heat $$=0.6 \mathrm{kcal} / \mathrm{kg}^{\circ} \mathrm{C}$$ ) and heats it till it boils. The graph between temperature and time is as follows. Heat supplied to the wax per minute and boiling point are respectively

The graph signifies

Which of the substances $$A, B$$ or $$C$$ has the highest specific heat ? The temperature vs time graph is shown