Q. No.Mark the correct statement(s) of the following.
| 1. | In the case of liquids, the boiling point increases with pressure for all liquids. |
| 2. | In the case of solids, the melting point decreases with pressure for all solids. |
| 3. | In the case of ice, the melting point decreases with pressure. |
| 4. | In the case of ice, the melting point increases with the pressure. |
| 1. | \(16\)-fold | 2. | \(4\)-fold |
| 3. | less than \(16\)-fold | 4. | more than \(16\)-fold |
A piece of hot copper at \(100~^\circ \text{C}\) is plunged into a pond at \(30~^\circ \text{C}\). The copper cools down to \(30~^\circ \text{C}\) while the pond being huge stays at its initial temperature. Then:
| 1. | the copper loses some entropy and the pond stays at the same entropy. |
| 2. | the copper loses some entropy and the pond gains exactly the same amount of entropy. |
| 3. | the copper loses entropy and the pond gains more than this amount of entropy. |
| 4. | both copper and the pond gain in entropy. |
Mercury is often used in clinical thermometers. Which one of the following properties of mercury is not a reason for this?
| 1. | the coefficient of thermal expansion is large. |
| 2. | it is shiny. |
| 3. | it is a liquid at room temperature. |
| 4. | it has a high density. |
A closed container of water at \(30^\circ \text{C}\) is opened while on the surface of the moon. What will happen to the water?
| 1. | The water will boil. |
| 2. | The water will form a spherical ball. |
| 3. | The water will freeze. |
| 4. | The water will split (break down) into hydrogen and oxygen. |
1. \(40\) g
2. \(90\) g
3. \(310\) g
4. \(360\) g
| 1. | \(l+\Delta l\) | 2. | \(l+\dfrac{\Delta l}{2}\) |
| 3. | \(l+\dfrac{\Delta l}{4}\) | 4. | \(l+\dfrac{3\Delta l}{4}\) |
| 1. | \(5 \alpha \) | 2. | \(\dfrac{3 \alpha}{5} \) |
| 3. | \(\dfrac{5 \alpha}{3} \) | 4. | \(15 \alpha\) |
Two identical balls, \(A\) and \(B\) of uniform composition are initially at the same temperature, each absorbs exactly the same amount of heat. Ball \(A\) is hanging down from the ceiling by a massless inextensible thread while ball \(B\) rests on the horizontal floor in the same room. Assuming no subsequent heat loss by the balls, which of the following statements is correct about their final temperatures, \(T_A\) and \(T_B,\) once the balls have reached their final dimension?
1. \(T_A<T_B\)
2. \(T_A>T_B\)
3. \(T_A=T_B\)
4. \(T_A\leq T_B\)
The thermal expansion of a solid is due to the:
| 1. | symmetric characteristic of the interatomic potential energy curve of the solid. |
| 2. | asymmetric characteristic of the interatomic potential energy curve of the solid. |
| 3. | double good nature of the interatomic potential energy curve of the solid. |
| 4. | rotational motion of the atoms of the solid. |
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