Questions (1529)
CSE
Consider the following statements
- The series of the International Paper Sizes is based on AO size whose area is 0.5 m2 (approximately)
- The area of A4 size paper is 118th of that of the AO size paper
Which of the statements given above is/are correct?
- A 1 only
- B 2 only
- C Both 1 and 2
- D Neither 1 nor 2 ✓
✓ Correct answer: (D)
Science & Technology › Physics & Chemistry
Q27CSE2011
A layer in the Earth's atmosphere called Ionosphere facilitates radio communication. Why?
- The presence of ozone causes the reflection of radio waves to Earth
- Radio waves have a very long wavelength
Which of the statements given above is/are correct?
- A 1 only
- B 2 only
- C Both 1 and 2
- D Neither 1 nor 2 ✓
✓ Correct answer: (D)
Science & Technology › Physics & Chemistry
Q50CSE2011
The surface of a lake is frozen in severe winter, but the water at its bottom is still liquid. What is the reason?
- A Ice is a bad conductor of heat
- B Since the surface of the lake is at the same temperature as the air, no heat is lost
- C The density of water is maximum at 4°C ✓
- D None of the statements (a), (b) and (c) given above is correct
✓ Correct answer: (C)
Science & Technology › Physics & Chemistry
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