1. Light-year measures which of the following? (4)
1. Intensity of light
2.Mass
3.Time
4.Distance
2. Which of the following gases is used for ripening the fruits ? (3)
1.Methane
2.Ethane
3.Ethylene
4.Acetylene
3. Besides hydrogen, which of the following elements is common in organic compounds? (4)
1.Phosphorus
2.Sulphur
3.Nitrogen
4.Carbon
4. Solid Carbon dioxide is termed as— (2)
1.Soft ice
2.Dry ice
3.White ice
4.None of these
5. 1 kg of a liquid is converted into its vapour at its boiling point. The heat absorbed in the process is called— (1)
1.Latent heat of vaporisation
2.Latent heat of fusion
3.Latent heat of sublimation
4.None of these
