JEE Exam  >  JEE Tests  >  Chapter-wise Tests for JEE Main & Advanced  >  Test: JEE Main 35 Year PYQs- Hydrocarbons - JEE MCQ

Test: JEE Main 35 Year PYQs- Hydrocarbons - JEE MCQ


Test Description

24 Questions MCQ Test Chapter-wise Tests for JEE Main & Advanced - Test: JEE Main 35 Year PYQs- Hydrocarbons

Test: JEE Main 35 Year PYQs- Hydrocarbons for JEE 2024 is part of Chapter-wise Tests for JEE Main & Advanced preparation. The Test: JEE Main 35 Year PYQs- Hydrocarbons questions and answers have been prepared according to the JEE exam syllabus.The Test: JEE Main 35 Year PYQs- Hydrocarbons MCQs are made for JEE 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: JEE Main 35 Year PYQs- Hydrocarbons below.
Solutions of Test: JEE Main 35 Year PYQs- Hydrocarbons questions in English are available as part of our Chapter-wise Tests for JEE Main & Advanced for JEE & Test: JEE Main 35 Year PYQs- Hydrocarbons solutions in Hindi for Chapter-wise Tests for JEE Main & Advanced course. Download more important topics, notes, lectures and mock test series for JEE Exam by signing up for free. Attempt Test: JEE Main 35 Year PYQs- Hydrocarbons | 24 questions in 50 minutes | Mock test for JEE preparation | Free important questions MCQ to study Chapter-wise Tests for JEE Main & Advanced for JEE Exam | Download free PDF with solutions
Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 1

Which of these will not react with acetylene? [2002]

Detailed Solution for Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 1

Acetylene reacts with the other three as:

Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 2

What is the product when acetylene reacts with hypochlorous acid? [2002]

Detailed Solution for Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 2

1 Crore+ students have signed up on EduRev. Have you? Download the App
Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 3

On mixing a certain alkane with chlorine and irradiating it with ultraviolet light, it forms only one monochloroalkane.This alkane could be [2003]

Detailed Solution for Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 3

In neopentane all the H atoms are same (1º).

Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 4

2-Methylbutane on reacting with bromine in the presence of sunlight gives mainly [2005]

Detailed Solution for Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 4

 

Ease of replacement of H-atom 3° > 2° > 1°.

Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 5

Butene-1 may be converted to butane by reaction with

Detailed Solution for Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 5

Alkenes combine with hydrogen under  pressure and in presence of a catalyst (Ni, Pt or Pd) and form alkanes.

Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 6

Reaction of one molecule of HBr with one molecule of 1, 3-butadiene at 40°C gives predominantly [2005]

Detailed Solution for Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 6

                                                

Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 7

Of the five isomeric hexanes, the isomer which can give two monochlorinated compounds is [2005]

Detailed Solution for Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 7

Since it contains only two  types of H-atoms hence it will give only two mono  chlorinated compounds viz. 

 and 

Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 8

Acid catalyzed hydration of alkenes except ethene leads to the formation of

Detailed Solution for Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 8

Water adds directly to the more reactive alkene in presence of a  strongly acidic catalyst forming alcohols.
Addition occurs according to Markonikov’s rule.

NOTE : Addition follows Markownikoff’s rule.

Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 9

Which types of isomerism is shown by 2, 3-dichlorobutane? [2005]

Detailed Solution for Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 9

2, 3-dichloro butane will exhibit optical isomerism due to the presence of two asymmetric carbon atom.

Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 10

The compound formed as a result of oxidation of ethyl benzene by KMnO4 is [2007]

Detailed Solution for Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 10

When alkyl benzene are oxidised with alkaline KMnO4, (strong oxidising agent) the entire alkyl group is oxidised to –COOH group regardless of length of side chain.

Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 11

Which of the following reactions will yield 2, 2-dibromopropane? [2007]

Detailed Solution for Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 11

The reaction follows Markownikoff rule which states that when unsymmetrical reagent adds across unsymmetrical double or triple bond the negative part adds to carbon atom having lesser number of hydrogen atoms.

Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 12

The reaction of toluene with Cl2 in presence of FeCl3 gives predominantly [2007]

Detailed Solution for Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 12

FeCl3 is Lewis acid. In presence of FeCl3 side chain hydrogen atoms of toluene are substituted.

Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 13

Toluene is nitrated and the resulting product is reduced with tin and hydrochloric acid. The product so obtained is diazotised and then heated wth cuprous bromide. The reaction mixture so formed contans [2008]

Detailed Solution for Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 13

NOTE : ​group whichis o-, p- directing group so on nitration of toluene the – NO2 group will occupy o-, p- positions.

on reduction with Sn/HCl they will form corresponding anilines in which –NO2 group changes to –NH2. The mixture now contains

anilines when diazotized and then treated with CuBr forms o-, p- bromotoluenes.

Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 14

In the following sequence of reactions, the alkene affords the compound ‘B’

The compound B is [2008] 

Detailed Solution for Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 14

Completing the sequence of given reactions,

Thus ‘B’ is CH3CHO Hence (d) is correct answer.

Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 15

The hydrocarbon which can react with sodium in liquid ammonia is [2008]

Detailed Solution for Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 15

Alkynes  having terminal –C ≡ H react with Na in liquid ammonia to yield H2 gas of the given compounds CH3CH2C ≡ CH can react with Na in liquid NH3 so the correct answer is (b).

Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 16

The treatment of CH3MgX with CH3C ≡ C-H produces   [2008]  

Detailed Solution for Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 16

Writing the reaction we get

So we find  that CH4 is produced in this reaction.

Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 17

One mole of a symmetrical alkene on ozonolysis gives two moles of an aldehyde having a molecular mass of 44 u. The alkene is[2010]

Detailed Solution for Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 17

The given molecular formula suggests that the aldehyde formed will be acetaldehyde hence the alkene  will be

Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 18

Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of : [2011]

Detailed Solution for Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 18

Compound must contain a vinyl group  in order to give formaldehyde as one of the product.

                                             

Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 19

Which branched chain isomer of the hydrocarbon with molecular mass 72u gives only one isomer of mono substituted alkyl halide ? [2012]

Detailed Solution for Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 19

Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 20

2-Hexyne gives trans-2-Hexene on treatment with :

Detailed Solution for Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 20

Anti addition of hydrogen atoms to the triple bond occurs when alkynes are reduced with sodium (or lithium) metal in ammonia, ethylamine, or alcohol at low temperatures. This reaction called, a dissolving metal reduction, produces an (E)- or trans-alkene.
Sodium in liq. NH3 is used as a source of electrons in the reduction of an alkyne to a trans alkene.

Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 21

Which compound would give 5 - keto - 2 - methylhexanal upon ozonolysis ?        [JEE M 2015]

Detailed Solution for Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 21

When 1, 3-dimethylcyclopentene is heated with ozone and then with zinc and acetic acid, oxidative cleavage leads to keto - aldehyde.

5- keto – 2 – methylhexanal

Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 22

The hottest region of Bunsen flame shown in the figure below is :         [JEE M 2016]

Detailed Solution for Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 22

Region 2 (blue flame) will be the hottest region of Bunsen flame shown in given figure

Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 23

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 occupy 330 mL.Assuming that the water formed is in liquid form and the volumes were measured at the same temperature and pressure, the formula of the hydrocarbon is:  [JEE M 2016]

Detailed Solution for Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 23

Volume of O2 used =  = 75 ml

∴ From the reaction of combustion

1 ml CxHy requires =

So, 4x + y = 20
x = 3
y = 8

Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 24

The reaction of propene with HOCl (Cl2 + H2O) proceeds through the intermediate:        [JEE M 2016]

Detailed Solution for Test: JEE Main 35 Year PYQs- Hydrocarbons - Question 24

447 docs|930 tests
Information about Test: JEE Main 35 Year PYQs- Hydrocarbons Page
In this test you can find the Exam questions for Test: JEE Main 35 Year PYQs- Hydrocarbons solved & explained in the simplest way possible. Besides giving Questions and answers for Test: JEE Main 35 Year PYQs- Hydrocarbons, EduRev gives you an ample number of Online tests for practice

Top Courses for JEE

Download as PDF

Top Courses for JEE