carbon (iv) oxide sublimes at (-78°c)it is called dry ice (a)Why it is called dry ice (b)it is used for keeping ice-cream cold.why it is preferred over ordinary ice? (c)Name other 3 substance that behave like dry ice

Answer 1

Iodine, Anhydrous acid benzoic acid

Answer 2

B) dry ice sublimes with leaving any wetness and it is a better coolant than ordinary ice

Answer 3

(a)
(b)because it sublime leaving no
wetness. 
(c)benzoic acid ,aluminium chloride, iodine, anhydrous hydroxide 

Answer 4

Iodine  , aluminum chloride, benzoic acid

Answer 5

B) because it sublimes leaving no wetness and it is because it is a better
coolant
C) iodine,iron(III) chloride, sulphur