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Principles Related to Practical Chemistry

JEE Main 2025 (Online) 2nd April Evening ShiftMatchingEasy📈 Topic in 34% papers+4−1
Ques. 1JEE Main 2025, 2 April (Evening 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)-(II), (D)-(I)
  3. (A)-(II), (B)-(IV), (C)-(I), (D)-(III)
  4. (A)-(II), (B)-(III), (C)-(IV), (D)-(I)

Answer

(1) (A)-(III), (B)-(I), (C)-(IV), (D)-(II)

Solution

(A) Simple distillation separates liquids whose boiling points differ widely: chloroform (334 K) and aniline (457 K) (III).

(B) Fractional distillation separates liquids with close boiling points: the petroleum fractions diesel and petrol (I).

(C) Distillation under reduced pressure is used for liquids that decompose at or below their normal boiling point: glycerol is recovered from spent-lye in the soap industry (IV).

(D) Steam distillation is used for steam-volatile liquids immiscible with water: aniline is separated from an aniline–water mixture (II).

(A)-(III), (B)-(I), (C)-(IV), (D)-(II)

Answer: (1)

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Ques. 2JEE Main 2025, 29 January (Morning Shift)

The steam volatile compounds among the following are : Choose the correct answer from the options given below :

  1. (B) and (D) Only
  2. (A), (B) and (C) Only
  3. (A) and (B) Only
  4. (A) and (C) Only
Ques. 3JEE Main 2025, 29 January (Evening Shift)

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 true but Statement II is false
  2. Statement I is false but Statement II is true
  3. Both Statement I and Statement II are false
  4. Both Statement I and Statement II are true
Ques. 4JEE Main 2025, 29 January (Evening Shift)

In the sulphur estimation, 0.20 g of a pure organic compound gave 0.40 g of barium sulphate. The percentage of sulphur in the compound is 10-1\%. (Molar mass : O = 16, S = 32, Ba = 137 in g mol-1)

Ques. 5JEE Main 2025, 28 January (Morning Shift)

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
Ques. 6JEE Main 2025, 28 January (Morning Shift)

The metal ion whose electronic configuration is not affected by the nature of the ligand and which gives a violet colour in non-luminous flame under hot condition in borax bead test is

  1. Cr3+
  2. Ti3+
  3. Ni2+
  4. Mn2+
Ques. 7JEE Main 2025, 28 January (Evening Shift)

The purification method based on the following physical transformation is : (X)Solid Heat (X)Vapour Cool (X)Solid

  1. Extraction
  2. Crystallization
  3. Distillation
  4. Sublimation
Ques. 8JEE Main 2025, 28 January (Evening Shift)

Identify the inorganic sulphides that are yellow in colour : Choose the correct answer from the options given below :

  1. (D) and (E) only
  2. (A) and (B) only
  3. (A), (D) and (E) only
  4. (A) and (C) only
Ques. 9JEE Main 2025, 24 January (Morning Shift)

Given below are two statements I and II. In the light of the above statements, choose the correct answer from the options given below

  1. Statement I is true but Statement II is false
  2. Statement I is false but Statement II is true
  3. Both Statement I and Statement II are true
  4. Both Statement I and Statement II are false
Ques. 10JEE Main 2025, 24 January (Morning Shift)

Among the following cations, the number of cations which will give characteristic precipitate in their identification tests with K4[Fe(CN)6] is . Cu2+, Fe3+, Ba2+, Ca2+, NH4+, Mg2+, Zn2+

Ques. 11JEE Main 2025, 24 January (Evening Shift)

Find the compound 'A' from the following reaction sequences. A aqua-regiaB [(2) AcOH](1) KNO2, NH4OH yellow ppt

  1. NiS
  2. MnS
  3. ZnS
  4. CoS

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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
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