Which class of organic compounds give effervescence with \(\text{NaHCO}_3\) Solution?
  • Aldehydes
  • Alcohols
  • Esters
  • Carboxylic acids
The hydrocarbon with the general formula \(C_nH_{2n+n}\)is an-
  • Alkyne
  • Alkene
  • unsaturated compounds
  • Alkane
The functional group present in carboxylic acids is
  • \( -\text{COOH} \)
  • \( -\text{OH} \)
  • \( -\text{CHO} \)
  • \( -\text{CO} \)
The major constituent of natural gas is
  • Methane
  • Butane
  • Propane
  • Ethane
Which of the following will react with sodium metal?
  • Ethanol
  • Ethane
  • Ethanal
  • Ethene
Which of the following will undergo addition reactions
  • \( C_2H_4 \)
  • \( C_2H_6 \)
  • \( C_3H_8 \)
  • \( CH_4 \)
Ethanol on oxidation gives
  • Ethanoic acid
  • Methane
  • Ethane
  • Formalin
Which of the following has the weakest carbon-carbon bond length?
  • \( \text{C}_2\text{H}_2 \)
  • \( \text{C}_2\text{H}_4 \)
  • \( \text{C}_2\text{H}_6 \)
  • All have the same bond length
Which of the following will not decolorize bromine water?
  • \( \text{C}_4H_6 \)
  • \( \text{C}_3H_8 \)
  • \( \text{C}_4H_8 \)
  • \( \text{C}_3H_4 \)
Which of the following is an alkyne?
  • \( \text{C}_6\text{H}_{10} \)
  • \( \text{C}_6\text{H}_6 \)
  • \( \text{C}_6\text{H}_{12} \)
  • \( \text{C}_6\text{H}_{14} \)
Ethanol on complete oxidation gives
  • \(\text{CO}_2\) and water
  • Acetone
  • Acetaldehyde
  • Acetic acid
Compounds made up of carbon and   hydrogen only are called
  • Hydrocarbons
  • Alkanes
  • Alkenes
  • Alkynes
Soaps are prepared by alkaline hydrolysis of-
  • Carboxylic acids
  • Lower esters
  • Higher esters
  • None of these
Open-chain saturated hydrocarbons are called
  • Alkenes
  • Paraffins
  • Alkyl groups
  • Alkynes
Which of the following will give a pleasant smell of ester when heated with ethanol and a small quantity of sulphuric acid?
  • \( CH_3COOH \)
  • \( CH_3CHO \)
  • \( CH_2CH_2OH \)
  • \( CH_3OH \)
The general formula of cyclic alkanes is
  • \( C_nH_{2n-2} \)
  • \( C_nH_{2n-1} \)
  • \( C_nH_{2n+2} \)
  • \( C_nH_{2n} \)
. n-butane and isobutene are
  • Alkenes
  • Alkynes
  • Isomers
  • None of these
The characteristic reaction of alkenes is
  • Polymerization
  • Substitution
  • Isomerization
  • Addition
Methane is a major constituent of
  • Biogas
  • Water-gas
  • Petroleum
  • Coal gas
The functional group in aldehydes is
  • \( -COOH \)
  • \( -CHO \)
  • \( -C=O \)
  • \( -COOR \)
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