CBSE Class 9 Answered
Answer the following questions.
(a)Why is dry ice more effective for cooling purposes than ordinary ice?
(b)Name the two gases which are supplied in compressed form in homes and hospitals.
(c) How is cooling of a gas done during its liquefaction?
Asked by Topperlearning User | 05 Apr, 2016, 11:03: AM
Expert Answer
(a) Dry ice can produce much lower temperatures than that produced by ordinary ice hence it is much more effective for cooling purposes than ordinary ice.
(b)LPG and O2 gas are supplied in homes and hospitals respectively.
(c)Cooling of the gas is usually done by pouring water over the coils carrying the compressed gas.
Answered by | 05 Apr, 2016, 01:03: PM
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