Chemistry MCQS for Class 10
Which hydrocarbon molecule would have no effect on the aqueous solution of bromine?
C10H20
CH4
C2H4
C2H2
The end product of oxidation of acetylene is .
None of these
Glyoxal
Oxalic acid
Glycol
The general formula of alkynes is
Cn H2n
Cn H2n+2
Cn H2n+1
Cn H2n-2
Ethylene is present is natural gas sometimes to the extent of .
10%
40%
20%
30%
In shoe polished, which chemical is used.
Ethanol
Formaldehyde
Methanol
Carbon black
Benzene is formed by the polymerization of.
Alkene
Acetylene
Alkane
Methane.
The order of reactivity of hydrogen halides with alkenes is.
HBr < HCl
HI>HBr
HCl>HBr
HBr>HI
Halogenation of alkanes in the presence of diffused sunlight takes place.
Suddenly, only in one step
Fastly in two steps
Slowly in one step
In a series of step
Which is simplest alkane?
CH4
C2H8
C2H2
C2H4
Ethyne is oxidized by alkaline KMnO4 then ……. hydroxyl group add to the triple bond.
Four
Two
Three
Five
Hydrogenation of alkenes and alkynes takes place at room temperature in the presence of.
Pt
Ni
Both a and b
Pd
Carbon Tetra chloride is used in .
Anesthesia
Fertilizer
Dry cleaning
Metallurgy
Halogenation of methane on the presence of diffused sunlight takes place.
Slowly in one step
In a series of four steps
Only in one step
Freshly in two steps
Which one is the formula of chloromethane.
CH2Cl2
CH3Cl
CHCl3
CCl4
Incomplete combustion of alkanes produce.
Carbon monoxide carbon black and water
Carbon monoxide only
Carbon dixoide only
Carbon dioxide and carbon black
Alkanes are least reactive compounds because they are.
Saturated hydrocarbons.
None of the above.
Both a and b
Unsaturated hydrocarbons.
The alkanes consisting of C5 to C10
plasma
liquids
gases
solid
General formula of alkenes.
CnH2n-1
CnH2n
Cn H2n-2
CnH2n+2
A hydrocarbon has molecular formula C8H14. What is the molecular formula of the next number of the same homologous series.
C9H18
C9H20
C9H12
C9H16
Oxidation of alkenes forms:
Oxalic acid
Glyoxal
Glycol
Formic acid
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