Question : Phosphorus is kept in water because

Option 1: Its ignition temperature is very high.

Option 2: Its ignition temperature is very low.

Option 3: Its critical temperature is high.

Option 4: Its critical temperature is low.

Question : Water will not vapourise if:

Option 1: the temperature is 0⁰C

Option 2: the humidity is 0%

Option 3: the humidity is 100%

Option 4: the temperature is 100⁰C

Question : In India, what is the mean annual average temperature in the subtropical vegetation zone?

Option 1: Above 24°C

Option 2: 7°C to 17°C

Option 3: Below 7°C

Option 4: 17°C to 24°C