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Class 10 Chemistry Chapter 23 Test 6 PDF Download | Monohydroxy Alkanes or Alcohols | Punjab Board 2027
Grade 10 Chemistry Chapter 23 Monohydroxy Alkanes or Alcohols Test 6
Download the Class 10 Chemistry Chapter 23 Test 6 PDF for the Punjab Board 2027 Model Papers. This chapter-wise test covers Chapter 23: Monohydroxy Alkanes or Alcohols, including textbook topics 23.3 to 23.5, according to the new syllabus issued by PECTAA Punjab. This Class 10 Chemistry chapter test is designed to help students prepare for board examinations through focused practice, revision, and self-assessment. Explore our Punjab Board 2027 Chemistry Chapter-wise Test Series to strengthen your understanding of the new syllabus.
Chapter Wise Class TestTest No. 6Chapter-23Monohydroxy Alkanes or Alcohols
1.Alcohol fuels are obtained from.
(a) Fossil fuels(b) Renewable source(c) Mineral(d) Coal
Answer: (b) Renewable source
2.Disadvantage of alcohol fuels is:
(a) High cost only(b) Produce more sulphur(c) Less energy per volume(d) Non-renewable
Answer: (c) Less energy per volume
3.Alcohol fuels are produced mainly from:
(a) plant materials(b) Petroleum(c) Coal tar(d) Metal
Answer: (a) plant materials
4.Ethanol and isopropanol help in drugs by.
(a) colouring(b) cooling(c) Thickening(d) Solubilizing
Answer: (d) Solubilizing
5.Ethanol evaporates quickly due to its:
(a) Density(b) Volatility(c) Color(d) Taste
Answer: (b) Volatility
6.Ethanol shows properties in cosmetics.
(a) corrosive(b) Radioactive(c) Antimicrobial(d) Explosive
Answer: (c) Antimicrobial
7.Ethanol widely used in perfumes due to:
(a) Catalyst(b) Oxidizing agent(c) Reducing Agent(d) Good solvent
Answer: (d) Good solvent
8.Major social risk associated with alcohol consumption is:
(a) Better Judgment(b) Improved health(c) Accident and risky Behaviour(d) Increase strength
Answer: (c) Accident and risky Behaviour
Chapter Wise Class TestTest No. 6Chapter-23Monohydroxy Alkanes or Alcohols
2. Write short answers to any six (6) questions.[6 × 2 = 12]
(i)
Name the first four aliphatic alcohols used as fuels and why?
Methanol, ethanol, propanol and butanol. They burn cleanly, release energy and can be made from renewable sources.
(ii)
Write any two disadvantages of alcohol used as fuels.
(1) They give less energy per unit volume than petrol. (2) They are corrosive to some engine parts and costly to produce in bulk.
(iii)
Why is more alcohol fuel needed to travel the same distance?
Alcohol has a lower energy density than petrol, so a larger volume is required to give the same energy.
(iv)
Why are alcohol fuels called carbon neutral?
The CO2 released on burning is about equal to that absorbed by the plants used to make them.
(v)
Why alcohol can use in cosmetic industry?
It is a good solvent, evaporates quickly and has antimicrobial action.
(vi)
What pollutants does Ethanol cut down on?
It reduces carbon monoxide, hydrocarbons, sulphur oxides and particulate matter.
(vii)
Give important property of ethanol which act as a solvent.
Its polar −OH group and small non-polar chain let it dissolve both polar and non-polar substances.
(viii)
Write harmful effect of drinking ethyl alcohol.
It damages liver and brain, impairs judgment and causes addiction and accidents.
(ix)
Why does the amount of [heat] evolved during burning of alcohols go on increasing from lower to higher alcohols?
Each higher alcohol has an extra −CH2− group, so more C–H and C–C bonds burn and more heat is released.
Note: Attempt any one question.[5 × 1 = 5]
3.
Write the application of alcohol as fuel along with its disadvantages.
Applications: blended with petrol (gasohol), used in racing cars, spirit lamps and as a cleaner-burning fuel.
Disadvantages: lower energy content, higher cost, cold-start problems, corrosion and large land/crop use.
Disadvantages: lower energy content, higher cost, cold-start problems, corrosion and large land/crop use.
4.
Explain Impact of Alcohols on Daily life.
Positive: fuel, solvents, antiseptics, perfumes, cosmetics and medicines.
Negative: drinking causes health damage, addiction, accidents and social problems.
Negative: drinking causes health damage, addiction, accidents and social problems.
