JEE Main
Chemistry
Hydrocarbons
Previous Years Questions

MCQ (Single Correct Answer)

In the given reactions identify $A$ and $B$ ...
Acid D formed in above reaction is :...
Major product of the following reaction is - ...
Products A and B formed in the following set of reactions are ...
Compound A formed in the following reaction reacts with B gives the product C. Find out A and B. ...
In the given reactions, identify the reagent A and reagent B. ...
Identify product A and product B : ...
The final product A formed in the following multistep reaction sequence is ...
The final product A, formed in the following reaction sequence is: ...
The product formed in the following multistep reaction is : ...
In the above reaction, left hand side and right hand side rings are named as '$$\mathrm{A}$$' and 'B' respectively. They undergo ring expansion. The ...
The major product formed in the following reaction is Choose the correct answer from the options given below :...
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. In the light of the above statements, choose th...
Find out the major product from the following reaction. ...
In the following reaction, 'B' is ...
'$$\mathrm{X}$$' is : ...
But-2-yne is reacted separately with one mole of Hydrogen as shown below : A. A is more soluble than B. B. The boiling point & melting point of A...
A hydrocarbon ' $\mathrm{X}$ ' with formula $\mathrm{C}_{6} \mathrm{H}_{8}$ uses two moles of $\mathrm{H}_{2}$ on catalytic hydrogenation of its one m...
Choose the correct set of reagents for the following conversion. trans $$\left(\mathrm{Ph}-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}_{3}\right) \rightarrow ...
The major products 'A' and 'B', respectively, are ...
The one giving maximum number of isomeric alkenes on dehydrohalogenation reaction is (excluding rearrangement)
The correct sequence of reagents for the preparation of Q and R is :...
Find out the major products from the following reactions. ...
In the following given reaction, 'A' is ...
$$ \stackrel{\bullet}{\mathrm{Cl}}+\mathrm{CH}_{4} \rightarrow \mathrm{A}+\mathrm{B} $$ A and B in the above atmospheric reaction step are :...
Major product of the following reaction is ...
A compound ‘$$\mathrm{A}$$’ on reaction with ‘$$\mathrm{X}$$’ and ‘$$\mathrm{Y}$$’ produces the same major product but different by product '$$a$$' an...
Two isomers 'A' and 'B' with molecular formula C4H8 give different products on oxidation with KMnO4 in acidic medium. Isomer 'A' on reaction with KMnO...
What will be the major product of following sequence of reactions? ...
Product 'A' of following sequence of reactions is ...
The major product in the following reaction ...
The product formed in the following reaction. ...
Given below are two statements : Statement I : The presence of weaker $$\pi$$-bonds make alkenes less stable than alkanes. Statement II : The strength...
Which of the following reagents / reactions will convert 'A' to 'B' ? ...
The stereoisomers that are formed by electrophilic addition of bromine to trans-but-2-ene is/are :
For the following sequence of reactions, the correct products are :...
The correct sequence of correct reagents for the following transformation is :...
Presence of which reagent will affect the reversibility of the following reaction, and change it to a irreversible reaction :CH4 + I2 $$\mathrel{\math...
An organic compound 'A' C4H8 on treatment with KMnO4/H+ yields compound 'B' C3H6O.Compound 'A' also yields compound 'B' an ozonolysis. Compound 'A' is...
Metallic sodium does not react normally with :
Benzene on nitration gives nitrobenzene in presence of HNO3 and H2SO4 mixture, where :
Major product P of above reaction, is :...
For above chemical reactions, identify the correct statement from the following :...
Match List - I with List - II :List - I (Chemicals)(a) Alcoholic potassium hydroxide(b) Pd/BaSO4(c) BHC (Benzene hexachloride)(d) PolyacetyleneList - ...
Choose the correct statement regarding the formation of carbocations A and B given....
Given below are two statements :Statement I : 2-methylbutane on oxidation with KMnO4 gives 2-methylbutan-2-ol.Statement II : n-alkanes can be easily o...
An unsaturated hydrocarbon X on ozonolysis gives A. Compound A when warmed with ammonical silver nitrate forms a bright silver mirror along the sides ...
Which of the following is Lindlar catalyst?
In $$\mathop C\limits^1 {H_2} = \mathop C\limits^2 = \mathop C\limits^3 H - \mathop C\limits^4 {H_3}$$ molecule, the hybridization of carbon 1, 2, 3 ...
The correct sequence of reagents used in the preparation of 4-bromo-2-nitroethyl benzene from benzene is :
The major product of the following reaction is :...
Identify A in the given chemical reaction. ...
The correct order of the following compounds showing increasing tendency towards nucleophilic substitution reaction is : ...
Identify products A and B. ...
The major product of the following reaction is : ...
The major product obtained from the following reaction is : ...
Which of the following compounds produces an optically inactive compound on hydrogenation?
The major product in the following reaction is : ...
The correct order of heat of combustion for following alkadienes is : ...
The major product (Y) in the following reactions is : ...
The major product [B] in the following sequence of reactions is :- ...
The major product in the following reaction is: ...
In the following reactions sequence, structure of A and B respectively will be : ...
Consider the following reaction : $${\left( {C{H_3}} \right)_3}CCH\left( {OH} \right)C{H_3}\buildrel {conc.\,\,\,{H_2}S{O_4}} \over \longrightarrow $...
In the following skew conformation of ethane, H'–C–C–H'' dihedral angle is : ...
Consider the following reactions : 'A' is :...
But-2-ene on reaction with alkaline KMnO4 at elevated temperature followed by acidification will give :
The major product of the following addition reaction is : H3C–CH=CH2 $$\buildrel {C{l_2}/{H_2}O} \over \longrightarrow $$
Increasing order of reactivity of the following compounds for SN1 substitution is: ...
Which of the following potential energy (PE) diagrams represents the SN1 reaction?
The major product of the following reaction is : ...
The major product of the following reaction is : ...
Polysubstitution is a major drawback in:
The major product of the following reaction is – ...
The major product of the following reaction is : ...
The major product of the following reaction is – ...
The correct order for acid strength of compounds : CH $$ \equiv $$ CH, CH3–C $$ \equiv $$ CH and CH2 = CH2 is as follows ...
The major product of the following reaction is ...
Which compound (s) out of the following is/are not aromatic ? ...
The major product of the following reaction is ...
The major product of the following reaction is : ...
The major product of the following reaction is : ...
The trans-alkenes are formed by the reduction of alkynes with
When 2-butyne is treate with H2/Lindlar's catalyst, compound X is produced as the major product and when treated with Na/liq. NH3 it produces Y as th...
The major product formed in the following reaction is : ...
Which of the following will most readily give the dehydrohalogenation product ?
The major product of the following reaction is : ...
Consider the reaction sequence below : X is:...
5 L of an alkane requires 25 L of oxygen for its complete combustion. If all volumes are measured at constant temperature and pressure, the alkane is ...
At 300 K and 1 atm, 15 mL of a gaseous hydrocarbon requires 375 mL air containing 20% O2 by volume for complete combustion. After combustion the gases...
The reaction of propene with HOCl (Cl2 + H2O) proceeds through the intermediate:
Which branched chain isomer of the hydrocarbon with molecular mass 72u gives only one isomer of mono substituted alkyl halide ?
2–Hexyne gives trans–2–Hexene on treatment with :
Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of :
The main product of the following reaction is $$\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,$$ $${C_6}{H_5}C{H_2}CH\left( {OH} \right)CH{\left( {C{H_...
Toluene is nitrated and the resulting product is reduced with tin and hydrochloric acid. The product so obtained is diazotised and then heated with cu...
In the following sequence of reactions, the alkene affords the compound ‘B’ CH3 - CH = CH - CH3 $$\buildrel {{O_3}} \over \longrightarrow $$ A $$\ma...
The hydrocarbon which can react with sodium in liquid ammonia is
The treatment of $$C{H_3}MgX\,\,$$ with $$C{H_3}C \equiv C - H$$ produces
The reaction of toluene with Cl2 in presence of FeCl3 gives predominantly
Which of the following reactions will yield 2, 2-dibromopropane?
The alkene formed as a major product in the above elimination reaction is ...
Of the five isomeric hexanes, the isomer which can give two monochlorinated compounds is
2 methylbutane on reacting with bromine in the presence of sunlight gives mainly
Reaction of one molecule of HBr with one molecule of 1,3-butadiene at 40oC gives predominantly
Which types of isomerism is shown by 2,3-dichlorobutane?
Which one of the following has the minimum boiling point?
On mixing a certain alkane with chlorine and irradiating it with ultravioletlight, it forms only one monochloroalkane. This alkane could be
Butene-1 may be converted to butane by reaction with
What is the product when acetylene reacts with hypochlorous acid ?
Which of these will not react with acetylene ?
Acetylene does not react with :

Numerical

Consider the given reaction. The total number of oxygen atom/s present per molecule of the product $$(\mathrm{P})$$ is _________....
For the given reaction The total number of possible products formed by tertiary carbocation of A is ____________....
The number of possible isomeric products formed when 3-chloro-1-butene reacts with $$\mathrm{HCl}$$ through carbocation formation is __________....
Molar mass of the hydrocarbon (X) which on ozonolysis consumes one mole of $$\mathrm{O}_{3}$$ per mole of $$(\mathrm{X})$$ and gives one mole each of ...
Number of bromo derivatives obtained on treating ethane with excess of $$\mathrm{Br}_{2}$$ in diffused sunlight is ___________
17 mg of a hydrocarbon (M.F. $$\mathrm{C_{10}H_{16}}$$) takes up 8.40 mL of the H$$_2$$ gas measured at 0$$^\circ$$C and 760 mm of Hg. Ozonolysis of t...
Maximum number of isomeric monochloro derivatives which can be obtained from 2,2,5,5-tetramethylhexane by chlorination is _____________
The major product 'A' of the following given reaction has _____________ sp2 hybridized carbon atoms. ...
Consider the above chemical reaction. The total number of stereoisomers possible for Product 'P' is _____________....
The number of sigma bonds in is _______________....
Consider the following chemical reaction. The number of sp2 hybridized carbon atom(s) present in the product is ________....
The minimum number of moles of O2 required for complete combustion of 1 mole of propane and 2 moles of butane is _____.
The total number of monohalogenated organic products in the following (including stereoisomers) reaction is ______. ...
In the following sequence of reactions the maximum number of atoms present in molecule 'C' in one plane is _________. (A is a lowest molecular weight...
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