Class 11 Organic Chemistry MCQs with Answers

Class 11 Organic Chemistry MCQs with Answers offer a targeted and comprehensive approach for Sainik School aspirants preparing for their chemistry exams. These multiple-choice questions are specifically tailored to the class 11 chemistry syllabus, focusing on organic chemistry principles. With clear and concise answers provided, students benefit from efficient self-assessment, identifying strengths and areas for improvement. Organic chemistry is a foundational aspect of the curriculum, and these MCQs ensure a solid understanding of key concepts.

As students gear up for Sainik School entrance exams, practicing these MCQs not only aids in exam readiness but also enhances problem-solving skills crucial for success. The content aligns with the broader goals of Sainik School education, promoting a holistic understanding of organic chemistry principles. This resource serves as an invaluable tool, helping students build a strong foundation for future academic endeavors and meeting the specific requirements of Sainik School examinations.

Q1.

Q2. Sodium nitroprusside reacts with sodium sulphide formed in lassaigne’s test to detect presence of sulphur gives violet colour
due to:

Q3. Which of the following compounds contain all the carbon atoms in the same hybridisation state?

Q4.

Q5. The principle involved in paper chromatography is:

1. Adsorption
2. Partition
3. Solubility
4. Volatility

Q6. Electronegativity of carbon atoms depends upon their state of hybridisation. In which of the following compounds, the
carbon marked with asterisk is most electronegative?

Q7.

Q8. In Dumas method, 0.25g of organic compound gave 40ml of N, at 300k and 725mm pressure. If aqueous tension at 300k is
25mm, the percentage of nitrogen in compound is:

1. 16.76%
2. 15.76%
3. 17.36%
4. 18.20%

Q9. Name the two types of chromatography techniques based on the principle of differential adsorption.

1. Column chromatography and thick layer chromatography.
2. Non-column chromatography and thin layer chromatography.
3. Column chromatography and thin layer chromatography.
4. Paper chromatography and thick layer chromatography.

Q10. Hyperconjugation involves delocalisation of _.

1. Electrons of carbon-hydrogen σ bond of an alkyl group directly attached to an atom of unsaturated system.
2. Electrons of carbon-hydrogen σ bond of alkyl group directly attached to the positively charged carbon atom.
3. -Electrons of carbon-carbon bond.
4. Lone pair of electrons.

Q11. The number of structural isomers possible for the molecular formula = C₃ H₉ N is:

1. 4
2. 5
3. 2
4. 3

Q12. In which of the following, functional group isomerism is not possible?

1. Alcohols
2. Aldehydes
3. Alkyl halides
4. Cyanides

Q13. The difference in energy between the actual structure and lowest energy canonical form is called:

1. Resonance energy.
2. Localisation energy.
3. Both (a) and (b).
4. All of these.

Q14. Glycerol can be separated from spent-lye in soap industry by:

1. Chromatography.
2. Sublimation.
3. Fractional distillation.
4. Distillaltion under reduced pressure.

Q15. What is the technological applications of fractional distillation?

1. To separate different fractions of crude oil in petroleum industry.
2. To separate different fractions of volatile and non-volatile solvents.
3. To separate mixture of amino acids.
4. No technological application of fractional distillation.