PYQSidePowered byPrepblink ExamsMy practice

Principles Related to Practical Chemistry

JEE Main 2024 (Online) 9th April Morning ShiftMCQEasy📈 Topic in 12% papers+4−1
Ques. 1JEE Main 2024, 9 April (Morning Shift)

Identify the incorrect statements regarding primary standard of titrimetric analysis. Choose the correct answer from the options given below :

  1. (C) and (E) only
  2. (A) and (B) only
  3. (B) and (E) only
  4. (C) and (D) only

Answer

(1) (C) and (E) only

Solution

A primary standard must be pure, dry, stable in air, non-hygroscopic and readily soluble, and must react fast and stoichiometrically.

(A), (B), (D): these are required properties, so they are correct.

(C): a hygroscopic solid absorbs moisture, so its weighed mass is not exact; hence (C) is incorrect.

(E): NaOH is hygroscopic (and absorbs CO2), and KMnO4 is not obtained pure and slowly decomposes, so both are secondary standards; hence (E) is incorrect.

Answer: (1)

Keep practising — Principles Related to Practical Chemistry

Ques. 2JEE Main 2024, 9 April (Morning Shift)

Methods used for purification of organic compounds are based on :

  1. neither on nature of compound nor on the impurity present.
  2. presence of impurity only.
  3. nature of compound and presence of impurity.
  4. nature of compound only.
Ques. 3JEE Main 2024, 9 April (Evening Shift)

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

  1. A-II, B-III, C-IV, D-I
  2. A-III, B-IV, C-I, D-II
  3. A-I, B-II, C-III, D-IV
  4. A-IV, B-I, C-II, D-III
Ques. 4JEE Main 2024, 9 April (Evening Shift)

[figure] In the given TLC, the distance of spot A & B are 5 cm & 7 cm, from the bottom of TLC plate, respectively. Rf value of B is x 10-1 times more than A. The value of x is .

Ques. 5JEE Main 2024, 9 April (Evening Shift)

Consider the following test for a group-IV cation. M2+ + H2S A (Black precipitate) + byproduct A + aqua regia B + NOCl + S + H2O B + KNO2 + CH3COOH C + byproduct The spin-only magnetic moment value of the metal complex C is BM (Nearest integer)

Ques. 6JEE Main 2024, 8 April (Morning Shift)

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

  1. A-III, B-I, C-IV, D-II
  2. A-III, B-IV, C-I, D-II
  3. A-III, B-II, C-IV, D-I
  4. A-III, B-I, C-II, D-IV
Ques. 7JEE Main 2024, 8 April (Morning Shift)

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

  1. A-IV, B-I, C-II, D-III
  2. A-I, B-II, C-III, D-IV
  3. A-II, B-III, C-IV, D-I
  4. A-III, B-I, C-II, D-IV
Ques. 8JEE Main 2024, 8 April (Evening Shift)

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

  1. (A)-(IV), (B)-(I), (C)-(II), (D)-(III)
  2. (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
  3. (A)-(II), (B)-(III), (C)-(IV), (D)-(I)
  4. (A)-(IV), (B)-(III), (C)-(I), (D)-(II)
Ques. 9JEE Main 2024, 8 April (Evening Shift)

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
Ques. 10JEE Main 2024, 8 April (Evening Shift)

In qualitative test for identification of presence of phosphorus, the compound is heated with an oxidising agent. Which is further treated with nitric acid and ammonium molybdate respectively. The yellow coloured precipitate obtained is :

  1. Na3PO4 12MoO3
  2. (NH4)3PO4 12(NH4)2MoO4
  3. MoPO4 21NH4NO3
  4. (NH4)3PO4 12MoO3
Ques. 11JEE Main 2024, 6 April (Morning Shift)

Match 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-III, B-IV, C-II, D-I
  3. A-IV, B-III, C-II, D-I
  4. A-IV, B-III, C-I, D-II

All Principles Related to Practical Chemistry PYQs →

PDFDownload Principles Related to Practical Chemistry 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 ReactionsSolid StateSolutionsElectrochemistryChemical Kinetics
Inorganic ChemistryClassification of Elements and Periodicity in PropertiesChemical Bonding and Molecular Structures-Block Elementsp-Block Elements (Group 13 & 14)Environmental ChemistryGeneral Principles of Isolation of Elementsp-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