Carbohydrates are composed of ____ .
carbon and hydrogen
carbon and oxygen
hydrogen and oxygen
carbon, hydrogen and oxygen
Carbohydrates are made of carbon, hydrogen and oxygen atoms. These atoms are arranged together in an specific order to form carbohydrates.
Two gases found dissolved in natural water are
(a) oxygen and carbon dioxide
(b) hydrogen and oxygen
(c) sulphur dioxide and hydrogen
(d) chlorine and ammonia