In vapour absorption refrigerator, the compression of refrigerent is avoided.

Sub-cooling can be achieved by circulating more quantity of cooling water through the condenser.

In vapour compression refrigeration, the vapour is drawn in the compressor cylinder during its suction stroke and is compressed adiabatically during the compression stroke.

all of the above

low boiling point

high critical temperature

high latent heat of vaporisation

all of these

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vertical line

inclined line

curved line

bright green

yellow

red

orange

absolute

relative

specific

none of these