Principles Related to Practical Chemistry

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)

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

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

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)

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

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

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

Which of the following statements are correct? Choose the most appropriate answer from the options given below :

1. A, C, D only
2. B, C, D only
3. A, B, D only
4. A, B, C only

During the detection of acidic radical present in a salt, a student gets a pale yellow precipitate soluble with difficulty in NH4OH solution when sodium carbonate extract was first acidified with dil. HNO3 and then AgNO3 solution was added. This indicates presence of :

1. I-
2. CO32-
3. Cl-
4. Br-

The correct statement among the following, for a "chromatography" purification method is :

1. Rf of a polar compound is smaller than that of a non-polar compound.
2. Non-polar compounds are retained at top and polar compounds come down in column chromatography.
3. Organic compounds run faster than solvent in the thin layer chromatographic plate.
4. Rf is an integral value.