NEET Physics: Thermal Properties of Matter — Practice Set 4
Q1. What happens to the pressure of an ideal gas if its volume is halved and temperature is kept constant?
A. It halves
B. It remains the same
C. It doubles
D. It triples
Q2. Which process describes the direct transition from solid to gas observed in iodine?
A. Melting
B. Vaporization
C. Condensation
D. Sublimation
Q3. A \( 0.1 \, \text{kg} \) lead block at \( 500^\circ \text{C} \) is placed in \( 0.4 \, \text{kg} \) water at \( 26^\circ \text{C} \) in a \( 0.05 \, \text{kg} \) brass calorimeter at \( 26^\circ \text{C} \). What is the final temperature? (Specific heat of lead = \( 127.7 \, \text{J kg}^{-1} \text{K}^{-1} \), water = \( 4186 \, \text{J kg}^{-1} \text{K}^{-1} \), brass = \( 386 \, \text{J kg}^{-1} \text{K}^{-1} \))
A. 29°C
B. 29.5°C
C. 30°C
D. 29.6°C
Q4. A \( 0.2 \, \text{kg} \) brass block at \( 350^\circ \text{C} \) is placed in \( 0.5 \, \text{kg} \) water at \( 27^\circ \text{C} \) in a \( 0.1 \, \text{kg} \) iron calorimeter at \( 27^\circ \text{C} \). What is the final temperature? (Specific heat of brass = \( 386 \, \text{J kg}^{-1} \text{K}^{-1} \), water = \( 4186 \, \text{J kg}^{-1} \text{K}^{-1} \), iron = \( 450 \, \text{J kg}^{-1} \text{K}^{-1} \))
A. 38°C
B. 39°C
C. 38.5°C
D. 38.3°C
Q5. A \( 0.25 \, \text{kg} \) silver block at \( 150^\circ \text{C} \) is placed in \( 1 \, \text{kg} \) of water at \( 25^\circ \text{C} \) in a \( 0.2 \, \text{kg} \) aluminium calorimeter at \( 25^\circ \text{C} \). What is the final temperature? (Specific heat of silver = \( 236 \, \text{J kg}^{-1} \text{K}^{-1} \), water = \( 4186 \, \text{J kg}^{-1} \text{K}^{-1} \), aluminium = \( 900 \, \text{J kg}^{-1} \text{K}^{-1} \))
A. 26°C
B. 26.7°C
C. 27°C
D. 28°C
Q6. A \( 0.25 \, \text{kg} \) iron block at \( 300^\circ \text{C} \) is placed in \( 0.8 \, \text{kg} \) water at \( 24^\circ \text{C} \) in a \( 0.05 \, \text{kg} \) silver calorimeter at \( 24^\circ \text{C} \). What is the final temperature? (Specific heat of iron = \( 450 \, \text{J kg}^{-1} \text{K}^{-1} \), water = \( 4186 \, \text{J kg}^{-1} \text{K}^{-1} \), silver = \( 236 \, \text{J kg}^{-1} \text{K}^{-1} \))
A. 32°C
B. 32.5°C
C. 32.9°C
D. 33°C
Q7. A \( 0.4 \, \text{kg} \) aluminium block at \( 160^\circ \text{C} \) is placed in \( 1.2 \, \text{kg} \) water at \( 28^\circ \text{C} \) in a \( 0.2 \, \text{kg} \) lead calorimeter at \( 28^\circ \text{C} \). What is the final temperature? (Specific heat of aluminium = \( 900 \, \text{J kg}^{-1} \text{K}^{-1} \), water = \( 4186 \, \text{J kg}^{-1} \text{K}^{-1} \), lead = \( 127.7 \, \text{J kg}^{-1} \text{K}^{-1} \))
A. 36°C
B. 36.8°C
C. 37°C
D. 35°C
Q8. Why can’t you open a tightly screwed metal lid until it’s heated in hot water?
A. The lid contracts
B. The lid expands, loosening it
C. The jar shrinks
D. The lid becomes softer
Q9. What happens to the temperature of an ideal gas if its volume doubles at constant pressure?
A. It halves
B. It remains the same
C. It doubles
D. It triples
Q10. Why does water in a calorimeter reach a steady temperature when mixed with a hot object?
A. Water evaporates
B. Heat is lost to surroundings
C. Heat lost equals heat gained
D. Temperature increases indefinitely
Physics — Thermal Properties of Matter
Set 4 of 13
15:00
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