Question

In the following statements:
(A) Ideal gases are liquefied only at very low temperatures.
(B) Ideal gases cannot be liquefied.
(C) Ideal gas behaviour is observed by real gases at low pressures.
(D) Ideal gases do not exist.
The correct statements are:

• A. $A,B,C$ and $D$
• B. $A,B$ and $C$
• C. $B,C$ and $D$
• D. $C$ and $D$

Answer 1

The correct option is C $B,C$ and $D$

The correct statements are B,C and D.
(A) and (B) Ideal gases cannot be liquefied as there is no attractive force present between the molecules, as they move independent of each other.
(C) Ideal gas behavior is observed by real gases at low pressures
(D) Ideal gases do not exist. All gases are real gases. They show more and more deviations from the gas laws (ideal behavior) as the pressure is increased or temperature is decreased.