0The hard coke is obtained when carbonization of coal is carried out at
(A) 500° to 700°C
(B) 700° to 900°C
(C) 300° to 500°C
(D) 900° to 1100°C
Which of the following is an intensive property of a thermodynamic system?
(A) Mass
(B) Temperature
(C) Energy
(D) Volume
Otto cycle is also known as
(A) Constant pressure cycle
(B) Constant volume cycle
(C) Constant temperature cycle
(D) Constant temperature and pressure cycle
Superheated vapour behaves
(A) Exactly as gas
(B) As steam
(C) As ordinary vapour
(D) Approximately as a gas
Absolute zero pressure will occur
(A) At sea level
(B) When molecular momentum of the system becomes zero
(C) Under vacuum conditions
(D) At a temperature of 273°K
No liquid can exist as liquid at
(A) 273°K
(B) Vacuum
(C) Zero pressure
(D) Centre of earth
