PYQSide ExamsMy practice

Haloalkanes and Haloarenes · Question 3

JEE Main 2026 (Online) 5th April Evening ShiftNumericalMedium📈 Topic in 3% papers+4
1

RMgI when treated with ice cold water liberated a gas which occupied 1.4 dm3/g at STP. The gas produced is further reacted with iodine in presence of HIO3 to give compound (X). Compound (X) in presence of Na and dry ether produced compound (Y). Molar mass of compound (Y) is g mol-1. (Nearest integer)

Answer

30

Solution

RMgI + H2O → R–H + Mg(OH)I

1 g of gas occupies 1.4 dm3 at STP

⇒ molar mass = 22.41.4 = 16 g mol-1 ⇒ gas = CH4 (R = CH3)

Iodination (HIO3 removes HI and drives the reversible reaction forward):

CH4 + I2 CH3I + HI; 5HI + HIO3 3I2 + 3H2O ⇒ X = CH3I

Wurtz reaction: 2CH3I + 2Na dry ether CH3-CH3 + 2NaI ⇒ Y = ethane

Molar mass of Y = 2(12) + 6(1) = 30 g mol-1

Answer: 30

JEE Main 2026 (Online) 5th April Evening Shift

Keep practising — Haloalkanes and Haloarenes

2

Match the LIST-I with LIST-II Choose the correct answer from the options given below :

  1. A-I, B-IV, C-III, D-II
  2. A-III, B-I, C-IV, D-II
  3. A-IV, B-II, C-I, D-III
  4. A-I, B-III, C-II, D-IV
JEE Main 2026 (Online) 4th April Morning Shift
3

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below :

  1. Both Statement I and Statement II are true
  2. Both Statement I and Statement II are false
  3. Statement I is true but Statement II is false
  4. Statement I is false but Statement II is true
JEE Main 2026 (Online) 2nd April Morning Shift
4

Correct statements regarding alkyl halides (R–X) among the following are : Choose the correct answer from the options given below :

  1. A, B and C Only
  2. B and D Only
  3. A and E Only
  4. D and E Only
JEE Main 2026 (Online) 2nd April Evening Shift
5

Which of the following reactions is NOT correctly represented?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
JEE Main 2026 (Online) 28th January Evening Shift
6

Identify the correct statements : The presence of -NO2 group in benzene ring Choose the correct answer from the options given below :

  1. A and D Only
  2. B and D Only
  3. C and A Only
  4. B and C Only
JEE Main 2026 (Online) 28th January Evening Shift
7

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below

  1. Statement I is false but Statement II is true
  2. Statement I is true but Statement II is false
  3. Both Statement I and Statement II are true
  4. Both Statement I and Statement II are false
JEE Main 2026 (Online) 24th January Morning Shift
8

Match the List-I with List-II Choose the correct answer from the options given below :

  1. A-III, B-IV, C-I, D-II
  2. A-IV, B-I, C-III, D-II
  3. A-III, B-IV, C-II, D-I
  4. A-I, B-II, C-IV, D-III
JEE Main 2026 (Online) 24th January Morning Shift
9

As compared with chlorocyclohexane, which of the following statements correctly apply to chlorobenzene? Choose the correct answer from the options given below :

  1. B, C and E Only
  2. A, C and E Only
  3. B, C and D Only
  4. A, D and E Only
JEE Main 2026 (Online) 22nd January Morning Shift
10

The correct order of the rate of reaction of the following reactants with nucleophile by SN1 mechanism is : (Given : Structures I and II are rigid) [figure]

  1. I < II < III < IV
  2. II < I < III < IV
  3. III < I < II < IV
  4. IV < III < II < I
JEE Main 2026 (Online) 22nd January Morning Shift
11

The correct order of reactivity of CH3Br in methanol with the following nucleophiles is F-, I-, C2H5O- and C6H5O-

  1. I- > C2H5O- > C6H5O- > F-
  2. I- > F- > C6H5O- > C2H5O-
  3. I- > C6H5O- > F- > C2H5O-
  4. I- > C2H5O- > F- > C6H5O-
JEE Main 2026 (Online) 22nd January Morning Shift

All Haloalkanes and Haloarenes PYQs →

PDFDownload Haloalkanes and Haloarenes PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
All JEE Main Chemistry chapters
Physical ChemistrySome Basic Concepts of ChemistryStructure of AtomStates of MatterThermodynamicsEquilibriumRedox ReactionsSolutionsElectrochemistryChemical Kinetics
Inorganic ChemistryClassification of Elements and Periodicity in PropertiesChemical Bonding and Molecular Structurep-Block Elements (Group 13 & 14)p-Block Elements (Group 15–18)d- and f-Block ElementsCoordination Compounds
Organic ChemistryOrganic Chemistry – Some Basic Principles and TechniquesIsomerismHydrocarbonsHaloalkanes and HaloarenesAlcohols, Phenols and EthersAldehydes, Ketones and Carboxylic AcidsAminesBiomoleculesPrinciples Related to Practical Chemistry