The marshy gas which is produced on decomposition of organic matter and is mostly found in coal mines, is the name of that gas?
(A) ethane
(B) Methane
(C) carbon dioxide
(D) carbon monoxide
Which of the following is essentially produced in the fermentation process?
(A) ethyl alcohol
(B) Methyl alcohol
(C) acetic acid
(D) yeast
Why is sodium stored in kerosene?
(A) To maintain in its original form
(B) It gets oxidised in air
(C) evaporation starts in the air
(D) it starts burning in air
What is the smallest unit of a chemical compound?
(A) Atomic
(B) electron
(C) Proton
(D) Molecules
Iron pipes, from which water is supplied, are coated with zinc (Zn) to prevent rusting. This layering process is called?
(A) Annealing
(B) Vulcanization
(C) Yashad coating
(D) none of these
Solute can be separated from solution?
(A) filtration
(B) evaporation
(C) Decantation
(D) sedimentation
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