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- 1. Multiple Choice
Which of the following statements is not applicable to carbon compounds ?
They have low melting and boiling points .
They are ionic in nature
They from homologous series
They are generally soluble in organic solvents.
- 2. Multiple Choice
The correct formula of formaldehyde is given by
HCHO
CH3 CHO
C2H5CHO
none of these
- 3. Multiple Choice
Carbonic acids are compounds
containing – OH group attached to alkyl group
containing – CO group attached to alkyl groups
Containing – CHO group attached to alkyl group
containing- COOH group attached to alkyl group
- 4. Multiple Choice
Water gas consists of
water vapour and dust
a mixture of carbon monoxide and hydrogen
a mixture of carbon monoxide and nitrogen
water vapour and methane
- 5. Multiple Choice
Which of the following gas is known as illuminating gas ?
Ethane
Ethene
Ethyne
Propane
- 6. Multiple Choice
The double bond between the two carbon atoms in the C2H4 molecule indicates
two pairs of mobile electrons
two pairs of shared electrons
two pairs of unpaired electrons
two pairs of lone electrons
- 7. Multiple Choice
Alkenes and alkynes are
saturated aliphatic hydrocarbons
unsaturated aliphatic hydrocarbon
unsaturated aromatic hydrocarbon
cyclic hydrogen
- 8. Multiple Choice
Which of the following compounds have a ring- carbon chain structure ?
Ethane
Ethene
Ethyne
Benzene
- 9. Multiple Choice
The structural formula of 2-butene is
CH3 – CH= C= CH2
CH3-C= C- CH3
CH3 = CH-CH2 –CH3
CH3 –CH= CH-CH3
- 10. Multiple Choice
Maximum number of bonds between two atoms of a covalent bond can be
four
two
three
one
- 11. Multiple Choice
The correct formula of ethanol is
C2H6OH
C2H5OH
CH3OH
CH3CH2CH2OH
- 12. Multiple Choice
Ketones are compounds
containing – OH group attached to alkyl group
containing – C=O group attached to alkyl group
containing –CHO group attached to alkyl group
containing – COOH group attached to alkyl group
- 13. Multiple Choice
The gas used in the welding and cutting of metals is
ethane
ethene
ethyne (acetylene)
propane
- 14. Multiple Choice
The process by which smaller molecules combine to give a molecule with a higher molecular weight is known as
condensation
polymerization
catenation
isomerisation
- 15. Multiple Choice
Coal with largest carbon content is
anthracite
peat
lignite
bituminous
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