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UPSC Exam  >  UPSC Test  >  Science & Technology CSE  >  12-Minute Test: Properties of Hydrocarbons - UPSC MCQ

Properties of Hydrocarbons - Free MCQ Practice Test with solutions, UPSC


MCQ Practice Test & Solutions: 12-Minute Test: Properties of Hydrocarbons (10 Questions)

You can prepare effectively for UPSC Science & Technology for UPSC CSE with this dedicated MCQ Practice Test (available with solutions) on the important topic of "12-Minute Test: Properties of Hydrocarbons". These 10 questions have been designed by the experts with the latest curriculum of UPSC 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 12 minutes
  • - Number of Questions: 10

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12-Minute Test: Properties of Hydrocarbons - Question 1
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Unsaturated carbon compounds on combustion give:

Detailed Solution: Question 1

Unsaturated hydrocarbons like ethyne also known as acetylene burn to produce a yellow sooty flame due to incomplete combustion in air.

The flame is sooty because the percentage of carbon is comparatively higher than that of alkanes and so does not get completely oxidized in air.

12-Minute Test: Properties of Hydrocarbons - Question 2
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The products obtained after the combustion of methane are:

Detailed Solution: Question 2

The combustion of methane produces the following:

  • Carbon dioxide (CO2)
  • Water (H2O)
  • Heat
  • Light

The chemical reaction can be summarised as:

CH4(g) + 2O2(g) → CO2(g) + 2H2O(g) + Heat + Light

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12-Minute Test: Properties of Hydrocarbons - Question 3
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The oxidising agent used to convert alcohols into carboxylic acid is:

Detailed Solution: Question 3

Alkaline potassium permanganate is an effective oxidising agent.

  • It converts alcohols into carboxylic acids.
  • It is often used in reactions needing strong oxidation.

Alkaline potassium permanganate is a good oxidising agent.

12-Minute Test: Properties of Hydrocarbons - Question 4
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In the hydrogenation of vegetable oils, the unsaturated hydrocarbons generally add hydrogen in the presence of:

Detailed Solution: Question 4

Addition of hydrogen across C-C double bonds is called hydrogenation. Unsaturated hydrocarbons add hydrogen in the presence of catalysts such as nickel/palladium to give saturated hydrocarbons. Vegetable oils used for cooking are long unsaturated hydrocarbons which are healthy.

12-Minute Test: Properties of Hydrocarbons - Question 5
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While cooking, if the bottom of the vessel is getting blackened on the outside, it means that:

Detailed Solution: Question 5

Incomplete combustion of fuel gives out sooty flame which contains unburnt carbon particles which deposits on the bottom of cooking utensils.

12-Minute Test: Properties of Hydrocarbons - Question 6
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The reaction in which oxidising agents supply nascent oxygen for oxidation of alcohols to their respective acids is known as:

Detailed Solution: Question 6

Oxidation is gain of oxygen. In this reaction oxygen is added to the reactant to form product. 

12-Minute Test: Properties of Hydrocarbons - Question 7
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The cooking gas used in our homes is mainly an:

Detailed Solution: Question 7

Saturated hydrocarbons contain C-C single bond and on complete combustion they produce large amounts of heat. The cooking gas used in house is Butane (C4H10) known as LPG or Methane (CH4) known as CNG.

12-Minute Test: Properties of Hydrocarbons - Question 8
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The molecular formula of benzene is:​

Detailed Solution: Question 8

The chemical formula of benzene is C6H6, so it has six carbon atoms and six hydrogen atoms.

12-Minute Test: Properties of Hydrocarbons - Question 9
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CH₂=CH₂ + H₂ → CH₃-CH₃ is an example of what type of reaction?

Detailed Solution: Question 9

The reaction where hydrogen adds across the double bond of ethene, forming ethane, is a clear example of an addition reaction. This occurs because unsaturated hydrocarbons like ethene can undergo addition reactions with molecules such as H₂.

12-Minute Test: Properties of Hydrocarbons - Question 10
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The conversion of butene to butane in presence of nickel is an example of:

Detailed Solution: Question 10

The reaction in which an element or molecule is added to unsaturated hydrocarbons is called addition reaction. In the above reaction unsaturated hydrocarbon is converted into saturated hydrocarbon.

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About this UPSC Practice Test

This test contains 10 MCQs on 12-Minute Test: Properties of Hydrocarbons with detailed solutions for each question. It is part of the Science & Technology for UPSC CSE course on EduRev, designed to align with the current UPSC syllabus. Each solution explains not just the correct answer but also gives you an understanding of the topic — not just to attempt the question but also help you prepare for the exam with practice.

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