`H_(2)O` is at its triple point. Keeping the pressure constant if its temperature is decreased then it becomes
(A) steam
(B) ice
(C) water
(D) steam + water

Define triple point of a substance. Write its value of temperature and pressure for water.

If pressure of a gas increases upto nine times keeping temperature constant then its rms velocity will become

Can the temperature of a gas increased keeping its pressure and volume constant ?

1 kg of ice at 0^@ C is heated at a constant rate and its temperature is recorded after every 30 s till steam is formed at 100^@ C. Draw a temperature-time graph to represent the change of phases.

The pressure on a sample of water at its triple point is reduced while the temperature is held constant .Which phases changes are favoured? (1) melting of ice (2)sublimation of ice (3) vaporization of liquid water

Nitrobenzene (C_6 H_5 NO_2) can be distilled with steam under one atmosphere pressure at a temperature of 372.2 K. Calculate the amount of steam necessary to distil 0.1 kg of nitrobenzene. The vapour pressure of water at 372.2 K is 739 mm.

A constant volume gas thermometer using helium records a pressure of 20.0k Pa at the triple point of water, and a pressure of 14.3 k Pa at the temperature of 'dry ice' ( solid CO_(2) ) . What is the temperature of dry ice?

A piece of ice at 0^(@)C is heated at a constant rate and its temperature recorded at regular intervals till steam is formed at 100^(@)C . Draw a temperature-time graph to represent the change in phase. Label the different parts of your graph.

Metal which does not react with cold water but evolves H_(2) with steam is :

In a calorimeter of water equivalent 20 g, water of mass 1.1 kg is taken at 288 K temperature. If steam at temperature 373 K is passed through it and temperature of water increases by 6.5^(@)C then the mass of steam condensed is