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JEE-Main - Grade 11 - Chemistry - Organic Chemistry - Some Basic Principles and Techniques - Importance and Snapshot of Organic Chemistry - Study ref# 683

Introduction: The element carbon has unique property called catenation due to which it forms covalent bonds with other carbon atoms. It also forms covalent bonds with atoms of other elements like hydrogen, oxygen, nitrogen, Sulphur, ph... read more

JEE-Main - Grade 11 - Chemistry - Organic Chemistry - Some Basic Principles and Techniques - Importance and Snapshot of Organic Chemistry - Study ref# 684

Following sections must be covered to understand Organic Chemistry: 1. General Introduction 2. Tetravalence of Carbon : Shapes of Organic Compounds 3. Structural Representations of Organic  Compounds 4. Classification of Organic ... read more

JEE-Main - Grade 11 - Chemistry - Organic Chemistry - Some Basic Principles and Techniques - Target Setup for Organic Chemistry - Study ref# 685

Student requires to achieve the following milestones to get better grip over Organic Chemistry. The milestones / targets are as follows:-Starting Point: Days 0Test TypeAppear on TestTarget TestsScorePractice Test000%Chapter Test000%Su... read more

JEE-Main - Grade 11 - Chemistry - Organic Chemistry - Some Basic Principles and Techniques - Study ref# 5353

Which of the two :  or  is expected to be more stable and why? Hint – Stability of a carbanion increases in the presence of electron withdrawing group but decreases in the presence of el... read more

JEE-Main - Grade 11 - Chemistry - Organic Chemistry - Some Basic Principles and Techniques - Study ref# 5354

Explain why alkyl groups act as electron donors when attached to a π-system? Answer: Due to hyperconjungation, alkyl groups act as electron donors when attached to a π – system as shown below.   ... read more

JEE-Main - Grade 11 - Chemistry - Organic Chemistry - Some Basic Principles and Techniques - Study ref# 5355

What are electrophiles and nucleophiles ? Explain with examples. Answer: 1.Electrophiles  The neutral or positively charged species with deficiency of electrons and capability of accepting a pair of electrons (Lewis acid) are called electrop... read more

JEE-Main - Grade 11 - Chemistry - Organic Chemistry - Some Basic Principles and Techniques - Study ref# 5356

Classify the following reactions in one of the reaction type studied in this unit. (a)   (b)   (c)   (d)   Hints- (a) A nucleophile  is substituted by other nucleophile   (b)... read more

JEE-Main - Grade 11 - Chemistry - Organic Chemistry - Some Basic Principles and Techniques - Study ref# 5357

Give a brief description of the principles of the following technique taking an example in each case:  Crystallisation        Answer: Crytallisation  It involves conversion of an impure  compound into its pure crystals. It is based on the... read more

JEE-Main - Grade 11 - Chemistry - Organic Chemistry - Some Basic Principles and Techniques - Study ref# 5358

Give a brief description of the principles of the following technique taking an example in each case: Distillation Answer: Distillation  It involves the process of heating a liquid to convert it into the vapours and condensing the vapours... read more

JEE-Main - Grade 11 - Chemistry - Organic Chemistry - Some Basic Principles and Techniques - Study ref# 5359

Give a brief description of the principles of the following technique taking an example in each case: Chromatography Answer: Chromatography    It is a technique for the separation , purification and  identification of the constituents of ... read more

JEE-Main - Grade 11 - Chemistry - Organic Chemistry - Some Basic Principles and Techniques - Study ref# 5360

Describe the method, which can be used to separate two compounds with different solubilities in a solvent S. Answer: Two compounds with different solubilities in a solvent S can be separated by fractional crystallization. When a hot saturated s... read more

JEE-Main - Grade 11 - Chemistry - Organic Chemistry - Some Basic Principles and Techniques - Study ref# 5361

What is the difference between distillation , distillation under reduced pressure and steam distillation  ? Hints- Discuss on the basis of boiling points of different substances. Answer: Distillation involves the process of heating a liquid ... read more

JEE-Main - Grade 11 - Chemistry - Organic Chemistry - Some Basic Principles and Techniques - Study ref# 5362

Explain the principle of paper chromatography. Answer: Paper chromatography is a type of partition chromatography. It is based on the principle of partition, i.e., it is based upon continuous differential partitioning or distribution of the var... read more

JEE-Main - Grade 11 - Chemistry - Organic Chemistry - Some Basic Principles and Techniques - Study ref# 5363

Why is nitric acid added to sodium extract before adding silver nitrate for testing halogens ? Answer: Sodium extract is boiled with nitric acid to decomposed  and  , if present.                              read more

JEE-Main - Grade 11 - Chemistry - Organic Chemistry - Some Basic Principles and Techniques - Study ref# 5364

Explain the reason for the fusion of an organic compound with metallic sodium for testing nitrogen, sulphur and halogens. Answer: Nitrogen, Sulphur and halogens are present in an organic compound in covalent form so their detection is not easy.... read more

JEE-Main - Grade 11 - Chemistry - Organic Chemistry - Some Basic Principles and Techniques - Study ref# 5365

Name a suitable technique of separation of the components from a mixture of calcium sulphate and camphor.   Hints – Camphor is a sublimate with  is not. A sublimate from a non-sublimate is separated by sublimation. Answer: A mixture ... read more

JEE-Main - Grade 11 - Chemistry - Organic Chemistry - Some Basic Principles and Techniques - Study ref# 5366

0.3780 g of an organic chloro compound gave 0.5740g of silver chloride in Carius estimation. Calculate the percentage of chlorine present in the compound. Answer: The mass of the organic compound taken = 0.3780 g Mass of   formed = 0.5740... read more

JEE-Main - Grade 11 - Chemistry - Organic Chemistry - Some Basic Principles and Techniques - Study ref# 5367

Show the polarization of carbon-magnesium bond in the following structure.    Answer: Carbon is more electronegative than magnesium therefore ,Mg acquires a partial positive charge and carbon acquires a partial negative charge. ... read more

JEE-Main - Grade 11 - Chemistry - Organic Chemistry - Some Basic Principles and Techniques - Study ref# 5368

Why does   act as an electrophile? Answer: Three highly electronegative oxygen atoms are attached to sulphur atom. It makes sulphur atom electron deficient. Further, due to resonance, sulphur acquires positive charge. Both these factors, mak... read more

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