Principles Related to Practical Chemistry

During " S " estimation, 160 mg of an organic compound gives 466 mg of barium sulphate. The percentage of Sulphur in the given compound is %. (Given molar mass in g mol-1 of Ba : 137, S : 32, O : 16)

Identify A, B and C in the given below reaction sequence [figure]

1. PbCl2, PbSO4, PbCrO4
2. PbS, PbSO4, Pb(CH3COO)2
3. PbS, PbSO4, PbCrO4
4. PbCl2, Pb(SO4)2, PbCrO4

In Carius method for estimation of halogens, 180 mg of an organic compound produced 143.5 mg of AgCl. The percentage composition of chlorine in the compound is %. (Given : molar mass in g mol-1 of Ag:108, Cl:35.5)

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

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

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.

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

[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 .

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