1990

CCl4,CF4(freon-14),CF2Cl2(freon-12) are used as refrigants
LIQUID AMMONIA IS USED AS REFRIGERANT
I think all of them r used as refrigerant .......
they r all given in ncert text book with exp..........

CFC's are currently banned,,they are good refrigerants..

NH3 is also used..

ans a and d..

this q asked earlier in the forum.

ALL THE OPTIONS ARE CORRECT

CCl₄.....VERY LOW M.P.
CH₂F₂....VERY LOW MP...
NH₃.....EASILY VAPORISES..

@EURE.....THIS Q IS PARTLY LOGIC AND PARTLY CRAMMING.....SOM TIMES EVN COMON SENSE.....

CF4(freon-14),CF2Cl2(freon-12) are also used as refrigerants right ???

A B C D E

ans given are a,d [7]

i think out of the all the given compounds only CCl₄ can be partially rejected as it is rarely used for refrigeration.......more commonly used in fire extinguishers. others have been used as refrigants at some or other time........ammonia,CF4 and CH2F2 are still used as refrigants.