Class X

Latent heat of vaporization is
1. Amount of heat required to raise temperature of a 1 kg of a substance by 1 K
2. Amount of heat required to raise temperature of a substance by 1 K
3. Amount of heat required to change phase of a substance from solid to liquid without any change in temperature
4. Amount of heat required to change phase of a substance from liquid to gas without any change in temperature
Boiling occurs at
1. Fixed Temperature
2. Unfixed Temperature
3. Any Temperature
4. Liquid bottom
Formula for measuring temperature according to centigrade scale is
1. θ °C = ((lθ - l0)/(l100 - l0)) × 100
2. θ °C =((l0 - l100)/(lθ - l0)) × 100
3. θ °C = ((1100 - l0)/(l0 - 1θ)) × 100
4. θ °C = ((lθ - l100)/(lθ - l0) × 100
A velocity-time graph can give you
1. Velocity of moving object
2. Acceleration of moving object
3. Displacement of moving object
4. All of above
Electromagnetic waves carry
1. Positive charge
2. Negative charge
3. No charge
4. Both positive and negative charge
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