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Principles Related to Practical Chemistry · Question 3

JEE Advanced 2025 Paper 2MCQEasy📈 Topic in 17% papers+4−1
1

During sodium nitroprusside test of sulphide ion in an aqueous solution, one of the ligands coordinated to the metal ion is converted to

  1. NOS-
  2. SCN-
  3. SNO-
  4. NCS-

Answer

(1) NOS-

Solution

Sulphide ion adds to the nitrosyl ligand of nitroprusside.

S2- + [Fe(CN)5(NO)]2- [Fe(CN)5(NOS)]4- (violet / purple colour)

Thus the NO+ ligand is converted into NOS-.

Answer: (A)

JEE Advanced 2025 Paper 2

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2

The correct match of the group reagents in List-I for precipitating the metal ion given in List-II from solutions, is

  1. P → 3; Q → 4; R → 2; S → 1
  2. P → 4; Q → 2; R → 3; S → 1
  3. P → 3; Q → 4; R → 1; S → 5
  4. P → 5; Q → 3; R → 2; S → 4
JEE Advanced 2025 Paper 1
3

Match the compounds in List-I with the appropriate observations in List-II and choose the correct option.

  1. P → 1; Q → 5; R → 4; S → 2
  2. P → 2; Q → 5; R → 1; S → 3
  3. P → 5; Q → 2; R → 1; S → 4
  4. P → 2; Q → 1; R → 5; S → 3
JEE Advanced 2025 Paper 1

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