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JEE-Main - Grade 11 - Chemistry - Hydrocarbons - Importance and Snapshot of Hydrocarbons - Study ref# 686

Introduction: The term ‘hydrocarbon’ is self-explanatory which means compounds of carbon and hydrogen only. Hydrocarbons play a key role in our daily life. You must be familiar with the terms ‘LPG’ and ‘CNG’ used as fuels. LPG is the a... read more

JEE-Main - Grade 11 - Chemistry - Hydrocarbons - Importance and Snapshot of Hydrocarbons - Study ref# 687

Following sections must be covered to understand the Hydrocarbons: 1. Classification 2. Alkalines 3. Alkenes 4. Alkynes 5. Aromatic Hydrocarbon 6. Carcinogenicity and Toxicity... read more

JEE-Main - Grade 11 - Chemistry - Hydrocarbons - Target Setup for Hydrocarbons - Study ref# 688

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

JEE-Main - Grade 11 - Chemistry - Hydrocarbons - Study ref# 1737

How do you account for the formation of ethane during chlorination of methane? Answer: Free radical chain mechanism for the chlorination of methane. (i) Initiation                           (ii) Propagation     (a) CH4 + read more

JEE-Main - Grade 11 - Chemistry - Hydrocarbons - Study ref# 1738

Write IUPAC names of  the compound: CH3CH=C(CH3)2 Answer: Hints: (i) Find the longest chain including functional group and write the root word. (ii) Write suffix of the functional group with its positions. (iii) Write the nam... read more

JEE-Main - Grade 11 - Chemistry - Hydrocarbons - Study ref# 1739

Write IUPAC names of  the compound: CH2 =CH-C≡C-CH3 Answer: Hints: (i) Find the longest chain including functional group and write the root word. (ii) Write suffix of the functional group with its positions. (iii) Write... read more

JEE-Main - Grade 11 - Chemistry - Hydrocarbons - Study ref# 1740

Write IUPAC names of  the compound: Answer:   Hints: (i) Find the longest chain including functional group and write the root word. (ii) Write suffix of the functional group with its positions. (iii) Write the name o... read more

JEE-Main - Grade 11 - Chemistry - Hydrocarbons - Study ref# 1741

Write IUPAC names of  the compound: Answer:   Hints: (i) Find the longest chain including functional group and write the root word. (ii) Write suffix of the functional group with its positions. (iii) Write the na... read more

JEE-Main - Grade 11 - Chemistry - Hydrocarbons - Study ref# 1742

Write IUPAC names of  the compound: CH3CH=CH-CH2-CH=CH-CH-CH2-CH=CH2 ... read more

JEE-Main - Grade 11 - Chemistry - Hydrocarbons - Study ref# 1743

For the following compound write structural formulae and IUPAC names for all possible isomers having the number of double or triple bond as indicated: C4H8 (one double bond) Answer: Isomers of C4H8 having one  double bond are: (i... read more

JEE-Main - Grade 11 - Chemistry - Hydrocarbons - Study ref# 1744

Write The IUPAC names of the products obtained by the ozonolysis of the compounds: Pent-2-ene Answer:   Hints: (i) To find the product of ozonolysis, break the double bond and add two O atoms, one with each double bonded C ... read more

JEE-Main - Grade 11 - Chemistry - Hydrocarbons - Study ref# 1745

Write The IUPAC names of the products obtained by the ozonolysis of the compounds:  1-phenylbut-1-ene Answer: Hints: (i) To find the product of ozonolysis, break the double bond and add two O atoms, one with each double bonded C at... read more

JEE-Main - Grade 11 - Chemistry - Hydrocarbons - Study ref# 1746

Propanal and pentane-3-one are the ozonolysis products of an alkene? What is the structural formula of the alkene? Answer: Hints: Write the structures of the products of ozonolysis in such a way that their oxygen atoms pointing toward... read more

JEE-Main - Grade 11 - Chemistry - Hydrocarbons - Study ref# 1747

Why is benzene extra ordinary stable though it contains three double bonds? Answer: Resonance and delocalization of electrons generally leads to the stability of benzene molecule. The dotted circle in the hybride structure represents the... read more

JEE-Main - Grade 11 - Chemistry - Hydrocarbons - Study ref# 1748

What are the necessary conditions for any system to be aromatic? Answer: The necessary conditions for any system to be aromatic are (i) The molecule should be planar. (ii) The molecule should be cyclic with alternate signal and double bon... read more

JEE-Main - Grade 11 - Chemistry - Hydrocarbons - Study ref# 1749

Explain why the following system is not aromatic?   Answer: The molecule is not planar because of the presence of sp3 hybridized carbon atom. It contains six π-electrons but its π-electron cloud does not surround al... read more

JEE-Main - Grade 11 - Chemistry - Hydrocarbons - Study ref# 1750

Explain why the following system is not aromatic?     Answer: Cyclo octatetraene is non-planar with 8π-electrons and hence , it is not aromatic.... read more

JEE-Main - Grade 11 - Chemistry - Hydrocarbons - Study ref# 1751

In the alkane H3CCH2-C(CH3)2-CH2CH(CH3)2, identify 1°,2°, 3° carbon atoms and given the number of H-atoms bonded to each one of these. Answer: 15-H bonded to five 1° C-atoms 4-H bonded to two 2° C-atoms 1-H b... read more

JEE-Main - Grade 11 - Chemistry - Hydrocarbons - Study ref# 1752

What effect does branching of an alkane chain has on its boiling point? Answer: Van der Waals’ force of attractions ∝surface area. Surface area decreases with increase in branching. Hence, boiling point of an alkane decreases with incr... read more

JEE-Main - Grade 11 - Chemistry - Hydrocarbons - Study ref# 1753

Why do alkenes prefer to undergo electrophilic addition reaction while arenes prefer electrophilic substitution reaction? Explain. Answer: Alkenes are rich source of loosely held pi(π) electrons, due to which they show electrophilic additi... read more

JEE-Main - Grade 11 - Chemistry - Hydrocarbons - Study ref# 1754

The relative reactivity of 1°,2°,3° hydrogen’s towards chlorination is 1:3.8:5. Calculate the percentage of all monochlorinated products obtained from 2-methylbutane. Answer: Relative amount of monochlorinated product  ... read more

JEE-Main - Grade 11 - Chemistry - Environmental Chemistry - Study ref# 2234

Explain tropospheric pollution in 100 words. Answer: Tropospheric pollution occurs due to the presence of undesirable solid or gaseous particles in the air. The major gaseous and particle pollutants present in the troposphere are: (... read more

JEE-Main - Grade 11 - Chemistry - Environmental Chemistry - Study ref# 2237

What are smogs? How are classical and photochemical smogs different? Answer: The word smog is derived from ‘smoke’ and ‘fog’. It is the most common example of air pollution that occurs in many cities throughout the world. There are two types... read more

JEE-Main - Grade 12 - Chemistry - Haloalkanes and Haloarenes - Study ref# 9928

Classify the following compounds s primary, secondary and tertiary halides. a)      1-bromobut -2-ene b)      4-bromopent -2-ene c)      2-bromo-2-methylp... read more

JEE-Main - Grade 12 - Chemistry - Amines - Study ref# 9997

Which of the following should be most volatile? I.                           II.   III.                          IV. (a) II       (b) IV            (c) I            (d) III Answer... read more

JEE-Main - Grade 12 - Chemistry - Chemistry in Everyday Life - Study ref# 10067

Which of the following is an example of liquid dishwashing detergent? Answer: (b) Liquid dishwashing detergents are non-ionic type. Non-ionic detergents do not contain any ion in their constitution. Mechanism of cleansing action of this ... read more

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