Question

Which of the following is an endothermic process?
(a) Dilution of sulphuric acid
(b) Sublimation of dry ice
(c) Condensation of water vapours
\ (d) Respiration in human beings

Answer 1

नमस्ते भाई कैसे हो मेरा नाम है नाम है नाम है नाम है

Answer 2

Answer: sub limitation of dry ice

STEP BY STEP EXPLANATIONSublimation of dry ice and evaporation of water both are endothermic process and these heat (energy) from their surrounding to get sublime or evaporate. Hence, both these processes produce cooling. This is the reason for using dry ice as refrigerant.