Organic Chemistry MCQ

Test your knowledge with important Organic Chemistry MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Organic Chemistry MCQs at Bissoy

• Study the following statements.<br>1. The gas supplied in cylinders for cooking is mixture of C₃H₈ and C₄H₁₀.<br>2. The thermal decomposition of alkanes is known as cracking.<br>3. Paraffin wax is saturated hydrocarbons.<br>Which of the statements given above are correct?
  ক

  1 and 2

  খ

  1 and 3

  গ

  2 and 3

  ঘ

  1, 2 and 3
• Formula of ethanol . . . . . . . . is.
  ক

  CH₅OH

  খ

  C₂H₆OH

  গ

  CH₃CH₂OH₂

  ঘ

  C₂H₅OH
• Unsaturated carbon compounds burn in oxygen with excessive black smoke providing a flame with . . . . . . . .
  ক

  yellow

  খ

  red

  গ

  brown

  ঘ

  blue
• The antiseptic action of dettol is due to presence of
  ক

  chlorobenzol

  খ

  chloroxylenol

  গ

  chloroquine

  ঘ

  chloroamphenicol
• Which one of the following carbon compounds will not give a sooty flame?
  ক

  Benzene

  খ

  Hexane

  গ

  Napthalene

  ঘ

  Anthracene
• Lactic acid is a:
  ক

  Three-carbon molecule

  খ

  One-carbon molecule

  গ

  Two-carbon molecule

  ঘ

  Four-carbon molecule
• Which of the following is the other name for 'marsh gas'?
  ক

  Methane

  খ

  Ethane

  গ

  Propane

  ঘ

  Butane
• Which of the following acids is present in ant bites?
  ক

  Formic acid

  খ

  Malic acid

  গ

  Perchloric acid

  ঘ

  Nitric acid
• During the first world war, which of the following gas was utilised as the chemical weapon?
  ক

  Carbon monoxide

  খ

  Hydrogen cyanide

  গ

  Mustard gas

  ঘ

  Burning vapour
• What are the elements present in alcohol?
  ক

  nitrogen, hydrogen, oxygen

  খ

  carbon, hydrogen, oxygen

  গ

  oxygen, carbon, nitrogen

  ঘ

  hydrogen, chlorine, oxygen
• . . . . . . . . is an unsaturated hydrocarbon.
  ক

  Ethane

  খ

  Butane

  গ

  Benzene

  ঘ

  Methane
• Synthetic ethanol is produced by reacting ethene (in the presence of phosphoric acid) with
  ক

  hydrogen

  খ

  potassium dichromate

  গ

  oxygen

  ঘ

  water (steam)
• Which of the following hydrocarbons have only one structure?
  ক

  Methane

  খ

  Ethane

  গ

  Propane

  ঘ

  All of these
• What is the number of mole(s) of H₂(g) required to saturate one mole benzene?
  ক

  1

  খ

  2

  গ

  3

  ঘ

  4
• In which one of the following reactions, the maximum quantity of H₂ gas is produced by the decomposition of 1 g of compound by $$\frac{{{H_2}O}}{{{O_2}}}$$ ?
  ক

  CH₄ + H₂O ⟶ CO + 3H₂

  খ

  CH₄ + H₂O ⟶ CO₂ + H₂

  গ

  CH₄ + $$\frac{1}{2}$$O₂ ⟶ CO + 2H₂

  ঘ

  C₁₂H₂₄ + 6O₂ ⟶ 12CO + 12H₂
• Chemical decomposition of an organic compound by water is called as
  ক

  hydrogenation

  খ

  hydration

  গ

  hydrolysis

  ঘ

  all of these
• Which of the following is used to denature ethanol?
  ক

  Methyl alcohol

  খ

  Propyl alcohol

  গ

  Phenol

  ঘ

  Methane
• Power Alcohol is a mixture of . . . . . . . . and ethyl alcohol.
  ক

  diesel

  খ

  petrol

  গ

  kerosene

  ঘ

  mustard
• Choose the wrong option for aldehyde-
  ক

  C₃H₇COH ⟶ butanol ⟶ butaldehyde

  খ

  CH₂COH ⟶ ethanol ⟶ acetaldehyde

  গ

  HCOH ⟶ methanol ⟶ formaldehyde

  ঘ

  C₂H₅COH ⟶ Propenol ⟶ propaldehyde
• Which acid is found in orange?
  ক

  Acetic acid

  খ

  Tartaric acid

  গ

  Salicylic acid

  ঘ

  Citric acid
• The three-carbon molecules broken down from six-carbon molecules of glucose during the first step in the process of nutrition inall organisms is called
  ক

  butane

  খ

  ethane

  গ

  pyruvate

  ঘ

  methane
• Which of the following is the main organic acid found in grapes?
  ক

  amino acid

  খ

  tartaric acid

  গ

  glycolic acid

  ঘ

  succinic acid
• To prevent the misuse of ethanol produced for industrial use, it is used as a toxic substance . . . . . . . . is mixed with it to make it unsuitable for drinking.
  ক

  methanol

  খ

  acetone

  গ

  ester

  ঘ

  ethanol
• Of the following chemical compounds, which one may soon be used as a fuel for driving vehicles?
  ক

  Ethanol

  খ

  Ethene

  গ

  Ethylene

  ঘ

  Ethane
• Which is a tribasic acid?
  ক

  Succinic acid

  খ

  Lactic acid

  গ

  Citric acid

  ঘ

  Valeric acid
• Ethanol is formed during:
  ক

  Aerobic respiration in muscles

  খ

  Anaerobic respiration in yeasts

  গ

  Anaerobic respiration in muscles

  ঘ

  Aerobic respiration in yeasts
• Alkanes are saturated hydrocarbons, in which a single bond is found between two carbon atoms. The general formula is:
  ক

  C_nH_{2n + 2}

  খ

  C_nH_{n + 1}

  গ

  C_nH_{2n - 1}

  ঘ

  C_nH_{2n + 1}
• . . . . . . . . is the simplest alcohol.
  ক

  butano

  খ

  ethanol

  গ

  ethyl alcohol

  ঘ

  methanol
• Which of the following is not present in animals, whereas plants have it?
  ক

  cellulose

  খ

  proteins

  গ

  fat

  ঘ

  starch
• If different carbon atoms are joined together to form open chain of carbon atoms with single bond only in a compound then such compounds are termed as
  ক

  alkenes

  খ

  alkynes

  গ

  benzene

  ঘ

  alkanes