ICSE Worksheet for chapter-12 Organic Chemistry class 10

Worksheet For class 10

This page is prepared by the Academic team of Physics Wallah which consists of ICSE Board Worksheet for Class 10 Chemistry. Students of Class 10 Chemistry can get a free Worksheet for Class 10 Chemistry in PDF format prepared as per the newest syllabus and examination pattern in your schools.

Standard 10 students can practice questions and answers which are given here for Chemistry in Grade 10 that will help them to improve their knowledge of all important chapters and their topics. Students can also download free pdf of Class 10 Chemistry Notes prepared by teachers and solve important problems provided here with solutions on daily basis to get more scores in school exams and tests.

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  • Introduction, unique nature of carbon atom, difference between organic and inorganic compounds
  • Classification of organic compounds
  • Alkyl groups and homologous series
  • Molecular formula, condensed structural formula, branched structural formula, Isomerism (chain,position,geometrical)
  • Nomenclature-Alkanes, Alkenes, Alkynes, Alcohols, Aldehydes, Carboxylic acids, Alkyl halides, Ketones and Ether

Preparation an​d Properties of

  • Methane and Ethane
  • Ethene
  • Ethyne
  • Ethanol
  • Acetic acid

Section - 1

Q1. Name the following statements:

  1. The type of reactions alkanes undergo.
  2. The type of reactions alkenes undergo.
  3. A simplest hydrocarbon
  4. The solution which detects the presence of unsaturation in the given hydrocarbon.
  5. Process by which ethene is obtained from ethanol.
  6. The hydrocarbon which contributes towards greenhouse effect.
  7. The catalyst used during hydrogenation of alkene.
  8. The compounds having same molecular formula but different structural formula.
  9. First organic compound synthesized.
  10. Mixture of sodium hydroxide and calcium oxide.

Q2. Give the formula of the next higher homologue of:

  1. Methanol
  2. Ethane
  3. Ethene
  4. Ethyne
  5. Propyl
  6. Methanoic acid
  7. Propane
  8. Butene
  9. Pentane
  10. Methanal

Q3. The list of some organic compound is given below:

Ethanol , Methanol , Methane , Ethane ,Ethyne and Ethene.

From the list above name a compound:

  1. Formed by the dehydration of ethanol by concentrated sulphuric acid.
  2. Which will give red precipitate with ammonical cuprous chloride solution?
  3. Which forms methanoic acid on oxidation in the presence of copper at 200°C.
  4. Which has vapour density 14 and turns alkaline potassium permanganate green?
  5. Which forms chloroform on halogenations in the presence of sunlight?
  6. Which decolorizes bromine solution in carbon tetrachloride?

Q4. Write the IUPAC name of the following:




  • H2C=C-CH2-CH2-OH



  • CH3-CH-CH2Cl



  • CH3-CH-CO-CH-CH3




  • CH3-CH-C-CH-OCH3

                      |         |

                  CH3    CH3

  •  CH2-CH-CHO


          OH Cl

          O  O

          ║  ║

  • HO-C-C-OH
  • CH2=CH-CH2-C≡CH
  • CH3-CH=CH-C≡CH

Section - 2

Q1. Give the name and structural formula of an unsaturated hydrocarbon with a triple bond.

  1. What is hydrogenation?
  2. What is halogenation?
  3. What is ‘pyrolysis ’ ? What is the other term signifying the same?

Q2. What are substitution reactions? Explain it.

Q3. What happens when (write only balanced chemical equation) :

  1. A mixture of methane and oxygen is heated in the presence of metallic oxide which acts as catalyst.
  2. A mixture of methane and air is heated at 400°C

Q4. Define a functional group.

Name the functional group of each of CH3OH, CH3COOH, CH3CHO.

Q5. Why ethene undergoes addition reactions with halogens whereas ethane undergoes substitution reactions?

Q6. The compound X which is a hydrocarbon contains 85.7% carbon by mass.

  1. Determine the empirical formula of X
  2. If the relative molecular mass of X is 28, find the molecular formula of X.
  3. Name X and write out its structural formula.

Q7. Acetic acid is a monocarboxylic acid

  1. What are carboxylic acids?
  2. Why monocarboxylic acids are commonly called fatty acids?
  3. In which, acetic acid occurs as (!) free acid (2) combined acid?

Q8. Answer the Following

  • The compound X has the following percentage composition by mass:Carbon=20%, Oxygen=26.67%, Nitrogen=46.67% and Hydrogen =6.67%. Determine the simplest empirical formula of the compound X.
  • If the relative molecular mass of X is 180, what is the molecular formula of X?

[C=12, O=16, H=1, N=14]

Q9. Answer the Following

  • Ethane and chlorine react together to form monochloroethane (ethyl chloride)
  1. Write down the structural formula of ethane.
  2. Show by equation the reaction between ethane and chlorine.
  3. What type of reaction has taken place between ethane and chlorine?
  • The type of reaction between ethane and chlorine is different from that between ethane and chlorine.
  1. What is the type of reaction between ethane and chlorine?
  2. Name the product of the reaction between ethane and chlorine
  3. Acetylene can be converted to benzene by suitable temperature and catalyst.
  4. State the temperature and catalyst
  5. What type of reaction has taken place?
  6. Write down the equation involved.
  • Burning acetylene in oxygen under appropriate conditions produces a very hot flame.
  1. Name the flame
  2. State the temperature of flame
  3. What is the hot flame used for?

Q10. Ethane can be converted into hexachloroethane by substitution reaction of chlorination.

  1. What is necessary for the above reaction?
  2. Show the above conversion by means of balanced equations.

Q11. How will you prepare methanal from

  1. Water gas
  2. By fermentation of sugar.

Q12. Ethanol and methanol are solvents for certain substances.Name two such substances for each of them

  1. Name the metals A, B, C, D and E which
  2. A is liquid at room temperature
  3. B is soft and cut with knife
  4. C has low m.p. and b.p.
  5. D is poor conductor of heat and electricity.
  6. E is pinkish red.
  7. Write down the balanced chemical equations for the following reaction:
  • Carbon and carbon dioxide
  • (ii)Iron (III) oxide and Carbon monoxide hydrochloric acid.

Q13. What is global warming ? What is the relationship between carbon dioxide and global warming?

Q14. What would be the effect of global warming on (1) living organism, (2) food production,

Q15. What is the atomicity of

  1. Oxygen
  2. Hydrogen
  3. Chlorine
  4. Nitrogen

Q16. A compound contains 37.5% of carbon, 12.5% of hydrogen and 50% of oxygen by the molecular weight of the compound is 32, what is its molecular formula?

Q17. Given the atomic masses H=1 and C=12, write down the possible empirical formula of a compound in which 6 gm of carbon are combined with 1 gm of hydrogen.

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