Chemistry MCQS for Class 10
General formula of alkynes is:
CnH2n-2
CnHn
CnH2n
CnH2n+2
Substitution reaction is the characteristics of.
Alkenes
Alkanes
Alkynes
None of these
Which one of these is a saturated hydrocarbon?
C2H4
C5H12
C4H8
C3H6
Which hydrocarbon decolorizes the pink colour of acidic solution of potassium permanganate?
C2H6
CH4
C2H5
C2H4
Which of one of the following is used as as fumigant:
ethylene oxide
ethylene glycol
Ethyl alcohol
diethyl ether
Incomplete combustion of alkanes produces.
Carbon dioxide and carbon black
Carbon monoxide and carbon black
Carbon dioxide only
Carbon monoxide only
Dehydrohalogenation takes place in the presence of .
Aqeous KOH
NaOH aqueous
Alcoholic NaOH
Alcoholic KOH
Alkanes are produced in large amounts by cracking of
Natural gas
Benzene
Xylol
Petroleum
Condensed formula of ethane is
H3CCH3
C2Cl6
C3Cl8
None of these
Dehydrohalogenation take place in the presence of.
Aqueous KOH
Alcoholic KOH
Alcoholic NaOH
Aqueous NaOH
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