Organic Chemistry Quiz - ICSE Class 10 Chemistry

Free practice quiz: Organic Chemistry (ICSE Class 10 Chemistry). 37 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This ICSE Class 10 Chemistry practice quiz has 37 multiple-choice questions on Organic Chemistry, and 37 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. Which of the following functional groups is characterized by a carbonyl group bonded to a hydroxyl group?

   1. Aldehyde
   2. Ketone
   3. Carboxylic acid
   4. Ester
   Show answer

   Answer: C. Carboxylic acid

   A carboxylic acid group (-COOH) consists of a carbonyl group (C=O) directly attached to a hydroxyl group (-OH).

2. The functional group -CHO is characteristic of which class of organic compounds?

   1. Ketones
   2. Aldehydes
   3. Carboxylic acids
   4. Alcohols
   Show answer

   Answer: B. Aldehydes

   The -CHO group is the aldehyde functional group, where a carbonyl group is bonded to at least one hydrogen atom.

3. The reaction of ethene with bromine water results in:

   1. Decolorization of bromine water and formation of 1,2-dibromoethane
   2. No reaction and bromine water remains colored
   3. Formation of ethanol and hydrogen
   4. Formation of ethene dibromide and water
   Show answer

   Answer: A. Decolorization of bromine water and formation of 1,2-dibromoethane

   Ethene, an alkene, undergoes an electrophilic addition reaction with bromine water. The double bond breaks, and bromine atoms add across the carbon atoms, forming 1,2-dibromoethane. This process consumes bromine, leading to the decolorization of the bromine water.

4. What is the name of the process used to convert alkenes into alkanes by adding hydrogen across the double bond?

   1. Dehydrogenation
   2. Hydrogenation
   3. Halogenation
   4. Hydrolysis
   Show answer

   Answer: B. Hydrogenation

   Hydrogenation is the addition of hydrogen to unsaturated compounds like alkenes and alkynes, typically in the presence of a catalyst (e.g., Ni, Pt, Pd), to form saturated compounds (alkanes).

5. The process of adding hydrogen to unsaturated fatty acids to convert them into saturated fatty acids is:

   1. Hydrogenation
   2. Hydrolysis
   3. Hydrogenolysis
   4. Halogenation
   Show answer

   Answer: A. Hydrogenation

   Hydrogenation involves the addition of hydrogen to double or triple bonds in unsaturated organic molecules. This process is used in the food industry to harden liquid vegetable oils into fats.

More questions in this quiz

Answers and explanations are in the full quiz.

1. Consider the reaction: CH3COOH + NaOH → CH3COONa + H2O. This is an example of which type of organic reaction?
2. What is the IUPAC name for CH3-CH2-O-CH2-CH3?
3. Ethanol can be oxidized to ethanoic acid using a strong oxidizing agent like acidified potassium dichromate. What is the intermediate product in this oxidation?
4. The process of converting vegetable oils into fats by hydrogenation in the presence of a catalyst like nickel is called:
5. What type of bonding is primarily found in organic compounds like methane and ethane?
6. The process of formation of soap from fats and alkali is known as:
7. Which of the following describes saturated hydrocarbons?
8. The reaction of an alcohol with a carboxylic acid in the presence of an acid catalyst to form an ester and water is called:
9. The combustion of methane (CH4) in the presence of excess oxygen produces:
10. Which of the following is an example of an aldehyde?
11. What is the general formula for alkanes?
12. Which process involves breaking down larger hydrocarbon molecules into smaller, more useful ones?
13. What is the IUPAC name for CH3-CH(CH3)-CH2-CH3?
14. Which of the following is a strong oxidizing agent commonly used in organic chemistry?
15. Which term describes organic compounds that have the same molecular formula but different structural formulas?
16. The addition of water to an alkene in the presence of an acid catalyst is called:
17. What is the functional group of esters?
18. The reaction of an alkyl halide with aqueous sodium hydroxide typically yields:
19. Which of the following is a cyclic hydrocarbon with the formula C6H12?
20. The homologous series of alkanes has the general formula:
21. Which compound is formed when ethanol reacts with sodium metal?
22. What is the systematic name for CH3-O-CH2-CH3?
23. Which functional group is present in ethanoic acid?
24. The reaction where an organic compound gains oxygen or loses hydrogen is called:
25. Which of the following is NOT a characteristic of aromatic hydrocarbons like benzene?
26. The addition of a halogen to an alkene is an example of:
27. The process of heating an organic compound strongly in the absence of air to decompose it into simpler compounds is known as:
28. Which reaction involves the breaking of a carbon-carbon double bond and the formation of two new molecules?
29. The reaction of an ester with water in the presence of an acid or base catalyst is called:
30. Which of the following is produced when ethanol is completely oxidized?
31. Which of the following processes is used to separate different components of crude oil based on their boiling points?
32. Which type of reaction is primarily exhibited by alkanes due to the strength and stability of C-C and C-H single bonds?

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