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 : Absolute zero is defined as:

Option 1: the temperature at which all molecular motion ceases.

Option 2: at which water boils at 298K.

Option 3: at which liquid helium boils.

Option 4: at which the volume becomes zero.

Question : Absolute zero is a temperature at which

Option 1: Molecular motion in a gas would cease

Option 2: Water freezes

Option 3: All gases become liquid

Option 4: All gases become solid

Question : The average kinetic energy of the molecules of an ideal gas is directly proportional to:

Option 1: velocity of molecules

Option 2: mass of molecules

Option 3: absolute temperature of the gas

Option 4: temperature of environment

Question : Which law was proposed in 1811, predicted that the same volume of gases at the same temperature and pressure would have the same number of molecules?

Option 1: Dalton’s law

Option 2: Gay-Lussac’s law

Option 3: Avogadro’s law

Option 4: Charles' law