Chemistry MCQS for Class 10
Hydrogenation of alkenes and alkynes may be carried out at room temperature in the presence of catalyst:
Fe2O3
Pt or Pd
Zn
Ni
Which gas creates suffocation and causes death?
CO
SO3
CO2
SO2
Volatility of hydrocarbons deceases with:
increase of molecular mass
increase of double or triple bonds
decrease of molecular mass
decrease of triple bonds
Chloroform is used for
Fever
Anesthesia
Link
Toys
In dry cleaning, which chemical is used.
Chloroform
Ethanol
Ecetaldehyde
Carbon tetachloride
The order of reactivity of hydrogen halides with alkenes is:
HBr>HI
HI>HBR
HCl>HBr
HBr>HCl
Ethylene glycol can be prepared with the reaction of KMnO4 and _____
CH3CH2CH3
CH3 – CH3
CH = CH
CH2= CH3
Which compound do not produce in the halogenation of methane.
Carbon tetrachloride
Chloroform
Chloromethane
Carbon black
Carbon black is used in the manufacture of.
Dry cleaning
Fertilizer
Shoe polishes.
None of these
Amont the followign substitution reaction is characteristics of.
None of these
Alkynes
Alkenes
Alkanes
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