Acetylene on treatment with dilute. having  gives:

In the given reaction,
 X will be:

(isomeric products), (isomeric products) Give the number of N and M:

Free radical halogenation takes place in tile presence of light or at high temperature (above 500C). Formation of halogen free radical intermediate takes place in first step called chain initiation •.
This reaction is mainly given by those compounds which have at least one hydrogen atom present at sp³ -hybrid carbon. Reactivity of -hybrid carbon depends on' the reactivity of reaction intermediate.
The relative rate of formation of alkyl radicals by a chlorine radical is:

Relative amount =
Relative amount = Number of hydrogen atoms on the respective carbon x relative reactivity. NBS (N-Bromo succinimide) is used for bromination at allylic and benzylic carbon, whereas gives bromination at benzylic, allylic and alkyl carbons Which one of the following compounds will react with NBS?

Nucleophilic substitution reaction" is given by those compounds which have nucleophilic. groups as leaving groups. The weaker the basicity of a group of the substrate, the better is its leaving ability. In nucleophilic substitution reactions, the basicity of leaving group should be less than the incoming nucleophilic group. Nucleophilic substitution reaction at sp3-hybridised carbon is either bimolecular or 1lIlim0lecular: Bimolecular reaction takes place in single step, involving transition state intermediate. In reaction, inversion in configuration takes place. In case of optically active alkyl halides, the inversion in configuration is called Walden "inversion. reaction is preferred if the compound has less steric hindrance. " Unimolecular ( ) reaction" involves two steps and" carbonium ion intermediate. Optically active" substrates give racemic mixture in these" reactions.
Which among the following will give reaction?
I)
II)
III)
IV) 

Identify the correct order of reactivity in electrophilic substitution reactions of the following compounds:
I)
II)
III)
IV)

Dehydrobromination (HBr^-) of the following in increasing order will be:
I)
II)
III) 

by the reaction is:

Oxidation of alkenes by cleavage with acidic or alkaline KMn04 or acidic K₂Cr2O₇ at higher temperature yields products depending upon the nature of aIkene. A hot solution ofKMnO₄ is a strong oxidising agent which gives only ketones and carboxylic . acids and not aldehydes (as they cannot be isolated).
Oxidation of alkenes with OsO₄ followed by alcoholic NaHSO₃ or Na₂SO₄ yields glycols.

An alkene 1,2-dimethyl cyclobutene on oxidation With. hot KMnO₄ gives:

Oxidation of alkenes by cleavage with acidic or alkaline KMn04 or acidic K₂Cr2O₇ at higher temperature yields products depending upon the nature of aIkene. A hot solution ofKMnO₄ is a strong oxidising agent which gives only ketones and carboxylic . acids and not aldehydes (as they cannot be isolated).

Oxidation of alkenes with OsO₄ followed by alcoholic NaHSO₃ or Na₂SO₄ yields glycols.

An alkene 1,2-dimethyl cyclobutene on oxidation With. hot KMnO₄ gives:

Oxidation of alkenes by cleavage with acidic or alkaline KMn04 or acidic K₂Cr2O₇ at higher temperature yields products depending upon the nature of aIkene. A hot solution ofKMnO₄ is a strong oxidising agent which gives only ketones and carboxylic . acids and not aldehydes (as they cannot be isolated).

Oxidation of alkenes with OsO₄ followed by alcoholic NaHSO₃ or Na₂SO₄ yields glycols.

An alkene 1,2-dimethyl cyclobutene on oxidation With. hot KMnO₄ gives:

Out of 21 tickets marked with numbers from 1 to 21, three are drawn at random. The chance that the numbers on them are in A.P., is

Three distinct numbers are selected from first 100 natural numbers. The probability that all the three numbers are divisible by 2 and 3 is

We should know the formula for combinations. We should know the concept of probability.

Suppose values taken by a variable x are such that , where  denotes the value of x in the i^th case for i = 1, 2, n. Then

Oxidation without cleavage of sigma bond takes place in alkenes.

Presence of unsaturation· -in alkenes is detected by using Baeyer's reagent. Alkenes decolourise pink colour of Baeyer’s. reagent. In presence of Baeyer's reagent, 'syn' addition of-OH groups takes place on both carbons· of double· bond. The net reaction can be given as,

Ozonolysis of· alkenes give ozonide, which on further hydrolysis gives aldehyde and/or ketone.

Linear polyenes on. ozonolysis gives two moles of acetaldehyde and one mole of propanedial. Linear polyene will be:

Hydrogenation of alkenes and alkynes takes place in presence of certain catalysts. In Sabatier Senderen's reaction, the. addition ·of hydrogen takes·· place in presence of Raney nickel· catalyst. Platinum and palladium can also be used as catalyst in these reactions. These are heterogeneous catalyst and used in. finely. divided state. Experimentally, it is observed that less. crowded alkenes adsorb H2 with faster rate. Controlled hydrogeneration of alkyne in presence of Lindlar's catalyst yields cis product i.e., 'cis' alkene. Thus, in presence of Lindlar's catalyst 'syn' addition takes place. The relative rate of hydrogenation follows the order:

Non-terminal alkynes an reduce4 in presence of Na or Li metal dissolved in liquid ammonia. In this reaction, anti-addition of hydrogen results into the trans-product. .
The product of the following reaction is:
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