Sample questions
You've seen the pattern — here are a few of the actual PYQs.
GEO2025
Which one of the following statements is not correct?
- A Water at 0 °C will have more energy than that of ice at 0 °C.
- B Temperature of ice remains constant as long as its melting is not complete.
- C Water vapour at 100 °C will have more energy than that of water at 100 °C.
- D Temperature of water varies during the process of vaporization. ✓
✓ Correct answer: (D)
Science & Technology › Physics & Chemistry
GEO2024
An ice bullet of temperature − 10°C is fired upon an object. The bullet spends 20% of its kinetic energy in penetrating into the object and remaining kinetic energy is spent into melting the bullet at 0°C. The latent heat of fusion of ice is 3·4 × 10^5 J kg^-1 and its specific heat capacity is 2000 J kg^-1 K^-1. Which one among the following is the correct initial speed of the bullet ?
- A 300 √10 m s^-1 ✓
- B 3600 m s^-1
- C 300 √5 m s^-1
- D 900 m s^-1
✓ Correct answer: (A)
Science & Technology › Physics & Chemistry
GEO2024
100 grams of ice at 0°C is put in 240 grams of water at 5°C. The mixture finally comes to equilibrium at 0°C with m grams of ice having melted in the process. Value of m is close to : (latent heat of ice = 3·33 × 10^5 J/kg and specific heat of water = 4·2 J g^-1 °C^-1)
- A 0 g
- B 10 g
- C 5 g
- D 15 g ✓
✓ Correct answer: (D)
Science & Technology › Physics & Chemistry
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