Of what did the early refrigerant called “chemogene” consist?
a)carbon dioxide and ammoniab)sulfuric ether and methylether
c)a mixture of petrol ether and naphtha
d)a mixture of sulfur dioxide and methyl chloride
b)sulfuric ether and methylether
c)a mixture of petrol ether and naphtha
d)a mixture of sulfur dioxide and methyl chloride
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