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Answered 1 day ago CBSE/Class 11/Science/Chemistry

How can one distinguish between an enantiomer and a homomer?

Gourab Dutta

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Isomers with the same constitution are called stereoisomers . hey can differ either in configuration or in conformation . Keep in mid that the distinction between configurational and conformational isomers is artificial, i.e. it arises from the limitations of our notation rather than from the actual... read more

Isomers with the same constitution are called stereoisomers . hey can differ either in configuration or in conformation . Keep in mid that the distinction between configurational and conformational isomers is artificial, i.e. it arises from the limitations of our notation rather than from the actual molecules. Homomers These are identical molecules - same composition, constitution, configuration, and conformation. Therefore we don't need the term "homomers" at all. Indeed, we are the only ones to use it. Enantiomers Enantiomers have a very special relation between their structures - they are mirror images of one another. When we refer to chirality or left- and right-handedness, we are referring to enantiomers

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Answered 3 days ago CBSE/Class 11/Science/Chemistry

Jacinta

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Hell-Volhard-Zelinsky Reaction Treatment with bromine and a catalytic amount of phosphorus leads to the selective α-bromination of carboxylic acids. Mechanism of the Hell-Volhard-Zelinsky Reaction Phosphorus reacts with bromine to give phosphorus tribromide, and in the first step this converts... read more

Hell-Volhard-Zelinsky Reaction

Treatment with bromine and a catalytic amount of phosphorus leads to the selective α-bromination of carboxylic acids.


Mechanism of the Hell-Volhard-Zelinsky Reaction

Phosphorus reacts with bromine to give phosphorus tribromide, and in the first step this converts the carboxylic acid into an acyl bromide.

An acyl bromide can readily exist in the enol form, and this tautomer is rapidly brominated at the α-carbon. The monobrominated compound is much less nucleophilic, so the reaction stops at this stage. This acyl intermediate compound can undergo bromide exchange with unreacted carboxylic acid via the anhydride, which allows the catalytic cycle to continue until the conversion is complete.

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Lesson Posted 8 hrs ago CBSE/Class 12 CBSE/Class 11/Commerce

F. W. Taylor's Scientific Management-Std XII/HSC/SYJC(OC), (CBSE/NCERT-Class XII Business Studies),

Rajiv Vadera

I am MBA Finance. I believe in conceptual learning and not just theoretical

Following 2 videos explain the principles of scientific management by F.W.Taylor read more

Following 2 videos explain the principles of scientific management by F.W.Taylor

 

 

 

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Answered 1 day ago CBSE/Class 11/Commerce/Business Studies Tuition/Class XI-XII Tuition (PUC)

Bright Light Co. manufactures electrical appliances. Finance manager of the Company is looking for a... read more
Bright Light Co. manufactures electrical appliances. Finance manager of the Company is looking for a financial instrument which fulfulls his long term finance needs but has Tax advantage to it. Suggest him which source of finance should he use. Give four advantages of this source. read less

Vibhor Gupta

The finance manager of the company can invest in Government's Tax Free Bonds. If he does so, the interest earned from such bonds will not be taxed as income tax, Further such type of bonds are highly liquid in nature.
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Answered on 06 Feb CBSE/Class 11/Commerce/Accountancy Tuition/Class XI-XII Tuition (PUC)

Accounting to which concept, all expenses incurred to earn revenue of a particular period should be charged... read more
Accounting to which concept, all expenses incurred to earn revenue of a particular period should be charged against that revenue to determine the net income? read less

Ashok Mahajan

No.1 in Accounts coaching

Matching concept
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Answered 2 days ago CBSE/Class 11/Humanities/Sociology Tuition/Class XI-XII Tuition (PUC)

What is meant by social order and how is it maintained?

Thirumani

Tutor

The term social order can be used in two senses. In the first sense, it refers to a particular set or system of linked social structures, institutions, relations, customs, values and practices, which conserve, maintain and enforce certain patterns of relating and behaving. read more

The term social order can be used in two senses. In the first sense, it refers to a particular set or system of linked social structures, institutions, relations, customs, values and practices, which conserve, maintain and enforce certain patterns of relating and behaving.

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Answered 1 day ago CBSE/Class 11/Humanities/History Tuition/Class XI-XII Tuition (PUC)

Critically examine the impact of Cabinet Mission Proposals on Indian polity.

Diksha Marwaha

Tutor

The mission arrived on March 24, 1946. The objective of this mission was to Devise a machinery to draw up the constitution of Independent India. Make arrangements for interim Government. Thus the mission was like a declaration of India’s independence. The mission spent some 3 weeks to discuss... read more

The mission arrived on March 24, 1946. The objective of this mission was to

  • Devise a machinery to draw up the constitution of Independent India.
  • Make arrangements for interim Government.
  • Thus the mission was like a declaration of India’s independence.

The mission spent some 3 weeks to discuss with the leaders of various political parties, but could not arrive at any agreed solution. So finally it announced its own recommendations on May 16, 1946.

  • The cabinet mission plan of 1946 proposed that there shall be a Union of India which was to be empowered to deal with the defense, foreign affairs and communications.
  • The cabinet mission recommended an undivided India and turned down the Muslim league’s demand for a separate Pakistan. The Cabinet mission restricted the Communal representation
  • It provided that all the members of the Interim cabinet would be Indians and there would be minimum interference by the Viceroy.
  • It also provided for formation of the constituent assembly on democratic principle of population.
  • It recognized Indian Right to cede from the Commonwealth
  • The Princely states would retain all subjects and all residuary powers.
  • A Constituent Assembly will be formed of the representatives of the Provincial Assemblies and the Princely states. Each province had to be allotted a total number of seats in proportion to the its population. The Constituent assembly had to comprise 293 Members from the British Provinces and 93 members from the Princely states.
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Answered on 31 Jan CBSE/Class 11/Humanities/Political Science Tuition/Class XI-XII Tuition (PUC)

Differentiate between the Fundamental Rights and Directive Principles of the State Policy.

K Mahesh Babu Babloo

Tutor

Fundamental rights which is guaranteed by constitution at its people, in case of derogation of it or infringement to it, aggrieved person can approach and challenge to it his or her concern, sc is a guardian of fr and directive principles which includes social benefits and well being which may not included... read more
Fundamental rights which is guaranteed by constitution at its people, in case of derogation of it or infringement to it, aggrieved person can approach and challenge to it his or her concern, sc is a guardian of fr and directive principles which includes social benefits and well being which may not included in any policy, there is no provision to challenge it, only fundamental rights, which our constitution has given a provisions for its people to challenge it in case of infringement. read less
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Answered 2 days ago CBSE/Class 11/Humanities/Political Science Tuition/Class XI-XII Tuition (PUC)

Which Indian state has its own different constitution?

FREDDY

J&K
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Answered 2 days ago CBSE/Class 11/Science/Physics Tuition/Class XI-XII Tuition (PUC)

The mean diameter of a thin brass rod is to be measured by vernier callipers. Why is a set of 100 measurements... read more
The mean diameter of a thin brass rod is to be measured by vernier callipers. Why is a set of 100 measurements of the diameter expected to yield a more reliable estimate than a set of 5 measurements only? read less

Manoj Karmakar

Physics Teacher

There is always an error in every measurement. Some times it positive or some times negative. Now if you measure less no of time then probability of error more. But taking many times measurment we can reduce the error.
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