Hydrocarbons

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Questions and Answers

What is the product of oxidizing toluene with hot acidic KMnO4?

  • Benzyl alcohol
  • Toluene diol
  • Benzaldehyde
  • Benzoic acid (correct)

Which of the following reactions is an example of electrophilic substitution?

  • Birch reduction of alkyl benzenes
  • Triozonide reaction of toluene (correct)
  • Hydrolysis of benzotrichloride
  • Oxidation of toluene with hot acidic KMnO4

What is the melting point of benzaldehyde?

  • 90°C
  • 100°C
  • 70°C
  • 81°C (correct)

What is the name of the explosive compound formed by mixing TNT with 80% ammonium nitrate?

<p>Amatol (A)</p> Signup and view all the answers

What is the product of hydrolysis of benzotrichloride?

<p>Benzyl alcohol (A)</p> Signup and view all the answers

What is the combustion reaction of toluene?

<p>C6H5CH3 + 9O2 → 7CO2 + 4H2O (A)</p> Signup and view all the answers

What is the octane number of Triptane or 2, 3, 3-Trimethylbutane?

<p>124 (B)</p> Signup and view all the answers

What is the purpose of using cyclopentadienyl manganese carbonyl in petrol?

<p>To reduce lead pollution (D)</p> Signup and view all the answers

Why does acetylene have a garlic odour when impure?

<p>Due to impurities of phosphine and hydrogen sulphide (D)</p> Signup and view all the answers

What is the correct order of acidic character of water, alcohols, acetylene, ammonia, ethylene, and ethane?

<p>H2O &gt; ROH &gt; HC  CH &gt; CH3 &gt; CH2 = CH2 &gt; CH3 –CH3 (C)</p> Signup and view all the answers

What is the name of the catalyst (Triphenylphosphine) rhodium, (PPh3)3 RhCl?

<p>Wilkinson's catalyst (D)</p> Signup and view all the answers

What is the product formed when alkylbenzene reacts with acidic KMnO4?

<p>Carboxylic acid (D)</p> Signup and view all the answers

Which reagent is used for hydroxylation of alkylbenzene?

<p>OsO4 (B)</p> Signup and view all the answers

What is the byproduct formed when hydrocarbon is burnt in excess oxygen?

<p>CO2 and H2O (B)</p> Signup and view all the answers

What is the product formed when alkylbenzene undergoes hydroformylation?

<p>Aldehyde (A)</p> Signup and view all the answers

Why are alkylbenzenes explosive when mixed with air or oxygen?

<p>They are highly reactive (C)</p> Signup and view all the answers

What is the oxidizing agent used for the hydroxylation of alkylbenzene?

<p>Perbenzoic acid (C)</p> Signup and view all the answers

What is the characteristic of alkylbenzene combustion?

<p>They burn with a luminous flame and form an explosive mixture with air or oxygen. (B)</p> Signup and view all the answers

What is the product formed when a hydrocarbon undergoes hydroxylation with OsO4?

<p>A diol (A)</p> Signup and view all the answers

What is the product formed when a hydrocarbon undergoes hydroformylation with CoH(CO)4?

<p>An aldehyde (A)</p> Signup and view all the answers

What is the reaction involved when a hydrocarbon reacts with acidic KMnO4?

<p>Hydroxylation (B)</p> Signup and view all the answers

What is the product formed when a hydrocarbon undergoes combustion with excess oxygen?

<p>CO2 and H2O (A)</p> Signup and view all the answers

What is the reagent used for the hydroxylation of alkylbenzene?

<p>All of the above (D)</p> Signup and view all the answers

What is the primary application of ozonolysis in organic chemistry?

<p>Determining the position of a double bond in an alkene molecule (A)</p> Signup and view all the answers

What is the result of oxy-mercuriation-demercuration of an alkene?

<p>Hydration of the alkene molecule according to Markovnikov's rule (C)</p> Signup and view all the answers

What is the product of epoxidation of an alkene?

<p>An alkene oxide (D)</p> Signup and view all the answers

What is the reaction type that ozonolysis is an example of?

<p>Oxidative cleavage (A)</p> Signup and view all the answers

What is the role of H2C=O in ozonolysis?

<p>A product of the reaction (A)</p> Signup and view all the answers

What is the purpose of using mercuric acetate in oxy-mercuriation-demercuration?

<p>To help in the hydration of the alkene molecule (D)</p> Signup and view all the answers

What is the correct order of reactivity of halogens in electrophilic addition reactions?

<p>F2 &gt; Cl2 &gt; Br2 &gt; I2 (D)</p> Signup and view all the answers

What is the mechanism of the Birch reduction reaction?

<p>Anionic free radical mechanism (A)</p> Signup and view all the answers

What is the product formed when an alkene reacts with sulphuric acid?

<p>Vicinal dihalide (A)</p> Signup and view all the answers

What is the correct rule followed in the reaction of an unsymmetrical alkene with HBr?

<p>Markownikoff's rule (A)</p> Signup and view all the answers

What is the reagent used in the hydroxylation of alkylbenzene?

<p>Alkaline KMnO4 (A)</p> Signup and view all the answers

What is the reaction of an alkene with hypohalous acid?

<p>Electrophilic addition (A)</p> Signup and view all the answers

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