Alkene, unsaturated hydrocarbon, which has a double bond between two carbon atoms, has a common formula, which is:
A. CnH2n + 2
B. CnH2n - 1
C. CnH2n + 1
D. CnH2n
Answer: Option D
A. CnH2n + 2
B. CnH2n - 1
C. CnH2n + 1
D. CnH2n
Answer: Option D
Traditional 'battery' contains which of the following chemicals?
A. Ethylene glycol
B. Sulphuric acid
C. Sodium bicarbonate
D. Ethanol
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