NEET Physics: Thermal Properties of Matter — Practice Set 12
Q1. Which temperature scale is based on the absolute minimum temperature where molecular activity theoretically ceases?
A. Kelvin
B. Celsius
C. Fahrenheit
D. Rankine
Q2. A gas occupies \( 3 \, \text{L} \) at \( 47^\circ \text{C} \) and \( 1.5 \, \text{atm} \). What will be its volume if the temperature drops to \( -23^\circ \text{C} \) and pressure increases to \( 3 \, \text{atm} \)?
A. 1.2 L
B. 1.17 L
C. 1.3 L
D. 1.1 L
Q3. What determines the final temperature when two objects of different temperatures are mixed in a calorimeter?
A. The volume of the objects
B. The pressure of the system
C. The material of the calorimeter
D. Conservation of heat energy
Q4. A \( 0.5 \, \text{kg} \) silver block at \( 240^\circ \text{C} \) is placed in \( 1.5 \, \text{kg} \) water at \( 21^\circ \text{C} \) in a \( 0.25 \, \text{kg} \) copper calorimeter at \( 21^\circ \text{C} \). What is the final temperature? (Specific heat of silver = \( 236 \, \text{J kg}^{-1} \text{K}^{-1} \), water = \( 4186 \, \text{J kg}^{-1} \text{K}^{-1} \), copper = \( 386 \, \text{J kg}^{-1} \text{K}^{-1} \))
A. 24°C
B. 25°C
C. 26°C
D. 23°C
Q5. A \( 0.1 \, \text{kg} \) iron block at \( 200^\circ \text{C} \) is dropped into \( 0.4 \, \text{kg} \) water at \( 30^\circ \text{C} \) in a \( 0.05 \, \text{kg} \) copper calorimeter at \( 30^\circ \text{C} \). Find the final temperature. (Specific heat of iron = \( 450 \, \text{J kg}^{-1} \text{K}^{-1} \), water = \( 4186 \, \text{J kg}^{-1} \text{K}^{-1} \), copper = \( 386 \, \text{J kg}^{-1} \text{K}^{-1} \))
A. 34°C
B. 34.4°C
C. 35°C
D. 33°C
Q6. How much heat is required to raise \( 0.6 \, \text{kg} \) of water from \( 25^\circ \text{C} \) to \( 75^\circ \text{C} \) and then convert \( 0.4 \, \text{kg} \) of it to steam at \( 100^\circ \text{C} \) in a \( 0.1 \, \text{kg} \) copper calorimeter initially at \( 25^\circ \text{C} \)? (Specific heat of water = \( 4186 \, \text{J kg}^{-1} \text{K}^{-1} \), copper = \( 386 \, \text{J kg}^{-1} \text{K}^{-1} \), latent heat of vaporization = \( 2.256 \times 10^6 \, \text{J kg}^{-1} \))
A. 1090 kJ
B. 1092 kJ
C. 1093.67 kJ
D. 1095 kJ
Q7. What defines the triple point of a substance?
A. Boiling and freezing occur together
B. Only vapor exists
C. Solid, liquid, and vapor coexist
D. Liquid turns to solid instantly
Q8. A steel rod of length \( 50 \, \text{cm} \) at \( 20^\circ \text{C} \) is heated until its length increases by \( 0.03 \, \text{cm} \). What is the final temperature? (\( \alpha_l = 1.2 \times 10^{-5} \, \text{K}^{-1} \))
A. 520°C
B. 500°C
C. 540°C
D. 510°C
Q9. A steel sphere of radius \( 5 \, \text{cm} \) at \( 20^\circ \text{C} \) is heated to \( 120^\circ \text{C} \). What is the percentage increase in its volume? (\( \alpha_l = 1.2 \times 10^{-5} \, \text{K}^{-1} \))
A. 0.35%
B. 0.36%
C. 0.37%
D. 0.34%
Q10. Why does a metallic lid expand more than a glass jar when heated together?
A. Metal has a higher coefficient of expansion
B. Glass has higher density
C. Metal absorbs less heat
D. Glass expands inward
Physics — Thermal Properties of Matter
Set 12 of 13
15:00
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