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Daily Practice Problems
Class 11 Chemistry
Hydrocarbons
daily practice problem

Question 1:

Compare the torsional strain in the gauche conformer of butane with the anti-conformer.

Draw Newman projections of both and indicate the values of the dihedral angles between Me’s.

 

Question 2:

Prepare

(1) Butane from chloroethane using the Corey – House synthesis.

(2) Deuteropropane from isopropyl bromide

 

Question 3:

The compound with highest boiling point is

1) n-hexane

2) n-pentane

3) 2,2-dimethyl propane

4) 2-methylbutane

 

Question 4:

The order of reactivity of halogens towards halogenation of alkanes is

1) F2 > Br2 > Cl2

2) F2 > Cl2 > Br2

3) Cl2 > F2 > Br2

4) Cl2 > Br2 > F2

 

Question 5:

Why do the C – C bond breaks rather than C – H bonds during cracking of alkanes?

 

Question 6:

The number of sigma & pi bonds in 1-butene-3-yne are

a) 5 sigma; 5 pi

b) 7 sigma; 3 pi

c) 8 sigma; 2 pi

d) 6 sigma; 4 pi

 

    Question 7:

      

Correct statements are

1) I is racemic mixture by anti-addition

2) II is meso compound by anti-addition

3) I is meso compound by syn-addition

4) II is racemic compound by syn-addition

 

   Question 8:

                                                                 

Which statement is true about this reaction?

1) A is meso 1,2-butan-di-ol formed by syn-addition

2) A is meso 1,2-butan-di-ol formed by anti-addition

3) A is racemic mixture of d & l, 1,2-butan-di-ol formed by anti-addition.

4) A is racemic mixture of d & l, 1,2-butan-di-ol formed by syn-addition.

 

Question 9:

A compound on reductive ozonolysis produces two moles of formaldehyde and one mole of glyoxal. The compound is

1) But-2-ene

2) 1,3-butadiene

3) 1,3-pentadiene

4) 1,4-pentadiene

 

Question 10:

How alkene can be obtained from vicinal dihalides?

 

Question 11:

Ethane can be separated from Ethyne by passing the mixture through

1) Conc. H2SO4

2) Ammonical Cu2Cl2

3) Pyrogallol

4) Charcoal powder

 

Question 12:

How is ethyne prepared on industrial scale from Calcium carbide?

 

Question 13:

How will you prepare propanone from propyne?        

 

Question 14:

Write the reaction of cyclic polymerisation of Ethyne to benzene.

 

Question 15:

How is ethyne prepared from 1,2-Dibromoethane?

 

Question 16:

Give reaction for preparation of Benzene from Na salt of benzoic acid.

 

Question 17:

What happens when benzene is heated in air?

 

Question 18:

Give Friedel craft’s alkylation reaction of benzene to produce toluene?

 

Question 19:

Give Friedel craft’s acylation reaction of benzene to produce Acetophenone by using acetic anhydride?

 

Question 20:

Give the reaction for preparation of benzene from phenol.

                                                            ***********

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In summary, problem-solving after learning a theoretical concept on CBSE Hydrocarbons Class 11 Chemistry is an essential part of the learning process. It enhances your understanding, critical thinking abilities, and retention of knowledge. Moreover, it equips you with valuable skills that are applicable in academic, personal, and professional contexts.

You must have heard of the phrase “Practice makes a man perfect”. Well, not just a man, practice indeed enhances perfection of every individual.

Practicing questions plays a pivotal role in achieving excellence in exams. Just as the adage goes, "Practice makes perfect," dedicating time to solve a diverse range of exam-related questions yields manifold benefits. Firstly, practicing questions allows students to familiarize themselves with the exam format and types of problems they might encounter. This familiarity instills confidence, reducing anxiety and improving performance on the actual exam day. Secondly, continuous practice sharpens problem-solving skills and enhances critical thinking, enabling students to approach complex problems with clarity and efficiency. Thirdly, it aids in identifying weak areas, allowing students to focus their efforts on improving specific topics. Moreover, practice aids in memory retention, as active engagement with the material reinforces learning. Regular practice also hones time management skills, ensuring that students can allocate appropriate time to each question during the exam. Overall, practicing questions not only boosts exam performance but also instills a deeper understanding of the subject matter, fostering a holistic and effective learning experience.

All About Daily Practice Problems on Class 11 Chemistry Hydrocarbons NCERT Chapter 9

Our Daily Practice Problems (DPPs) offer a diverse range of question types, including Multiple Choice Questions (MCQs) as well as short and long answer types. These questions are categorized into Easy, Moderate, and Difficult levels, allowing students to gradually progress and challenge themselves accordingly. Additionally, comprehensive solutions are provided for each question, available for download in PDF format - Download pdf solutions as well as Download pdf Questions. This approach fosters a holistic learning experience, catering to different learning styles, promoting self-assessment, and improving problem-solving skills. With our well-structured DPPs, students can excel in exams while gaining a deeper understanding of the subject matter. Hope you found the content on Class 11 Chemistry Hydrocarbons NCERT Chapter 9 useful.

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