PYQSidePowered byPrepblink ExamsMy practice

Principles Related to Practical Chemistry

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

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

  1. Both Statement I and Statement II are correct
  2. Statement I is incorrect but Statement II is correct
  3. Both Statement I and Statement II are incorrect
  4. Statement I is correct but Statement II is incorrect

Answer

(1) Both Statement I and Statement II are correct

Solution

Potassium hydrogen phthalate (KHP): pure, stable, non-hygroscopic, high molar mass ⇒ primary standard for NaOH ⇒ Statement I is correct

KHP (weak acid) + NaOH (strong base) ⇒ end point pH ≈ 9

∵ phenolphthalein changes colour in pH 8.3–10 ⇒ Statement II is correct

Answer: (1)

Keep practising — Principles Related to Practical Chemistry

Ques. 2JEE Main 2024, 1 February (Morning Shift)

The number of white coloured salts, among the following is (a) SrSO4 (b) Mg(NH4)PO4 (c) BaCrO4 (d) Mn(OH)2 (e) PbSO4 (f) PbCrO4 (g) AgBr (h) PbI2 (i) CaC2O4 (j) [Fe(OH)2(CH3COO)]

Ques. 3JEE Main 2024, 1 February (Evening Shift)

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

  1. Statement I is false but Statement II is true
  2. Both Statement I and Statement II are true
  3. Statement I is true but Statement II is false
  4. Both Statement I and Statement II are false
Ques. 4JEE Main 2024, 1 February (Evening Shift)

Lassaigne's test is used for detection of :

  1. Phosphorous and halogens only
  2. Nitrogen, Sulphur and Phosphorous only
  3. Nitrogen, Sulphur, phosphorous and halogens
  4. Nitrogen and Sulphur only
Ques. 5JEE Main 2024, 1 February (Evening Shift)

Following Kjeldahl's method, 1 g of organic compound released ammonia, that neutralised 10 mL of 2 M H2SO4. The percentage of nitrogen in the compound is %.

Ques. 6JEE Main 2024, 31 January (Morning Shift)

The compound that is white in color is

  1. ammonium sulphide
  2. ammonium arsenomolybdate
  3. lead iodide
  4. lead sulphate
Ques. 7JEE Main 2024, 31 January (Morning Shift)

Match List I with List II

  1. A-I, B-II, C-IV, D-III
  2. A-II, B-III, C-I, D-IV
  3. A-IV, B-I, C-II, D-III
  4. A-IV, B-III, C-II, D-I
Ques. 8JEE Main 2024, 31 January (Morning Shift)

'Adsorption' principle is used for which of the following purification method?

  1. Chromatography
  2. Sublimation
  3. Distillation
  4. Extraction
Ques. 9JEE Main 2024, 31 January (Morning Shift)

Molar mass of the salt from NaBr, NaNO3, KI and CaF2 which does not evolve coloured vapours on heating with concentrated H2SO4 is g mol-1. (Molar mass in g mol-1 : Na : 23, N : 14, K : 39, O : 16, Br : 80, I : 127, F : 19, Ca : 40)

Ques. 10JEE Main 2024, 31 January (Evening Shift)

The fragrance of flowers is due to the presence of some steam volatile organic compounds called essential oils. These are generally insoluble in water at room temperature but are miscible with water vapour in vapour phase. A suitable method for the extraction of these oils from the flowers is -

  1. distillation
  2. steam distillation
  3. distillation under reduced pressure
  4. crystallisation
Ques. 11JEE Main 2024, 30 January (Morning Shift)

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

  1. Both Statement I and Statement II are false
  2. Statement I is true but Statement II is false
  3. Both Statement I and Statement II are true
  4. Statement I is false but Statement II is true

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