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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...
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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...
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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...
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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 +
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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...
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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...
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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...
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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...
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JEE-Main - Grade 11 - Chemistry - Hydrocarbons - Study ref# 1742
Write IUPAC names of the compound:
CH3CH=CH-CH2-CH=CH-CH-CH2-CH=CH2 ...
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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...
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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 ...
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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...
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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...
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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...
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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...
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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...
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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....
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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...
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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...
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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...
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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 ...
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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: (...
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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...
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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...
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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...
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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 ...
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