MEDIUM
12th ICSE
IMPORTANT
Earn 100

State the principles which serve as basis for the Magnetic separation in metallurgy.

Important Questions on Sample Question Paper 4

MEDIUM
12th ICSE
IMPORTANT
All In One ISC Chemistry Class 12>Chapter 19 - Sample Question Paper 4>SAMPLE QUESTION PAPER 4>Q 13
State the principles which serve as basis for the refining by liquation in metallurgy.
MEDIUM
12th ICSE
IMPORTANT
All In One ISC Chemistry Class 12>Chapter 19 - Sample Question Paper 4>SAMPLE QUESTION PAPER 4>Q 13

Write the reactions involved in the following process: Leaching of bauxite ore to prepare pure alumina.

HARD
12th ICSE
IMPORTANT
All In One ISC Chemistry Class 12>Chapter 19 - Sample Question Paper 4>SAMPLE QUESTION PAPER 4>Q 13
Write the reactions involved in the following process: Refining of zirconium by the van-Arkel method.
MEDIUM
12th ICSE
IMPORTANT
All In One ISC Chemistry Class 12>Chapter 19 - Sample Question Paper 4>SAMPLE QUESTION PAPER 4>Q 13
Write the reactions involved in the following process: Recovery of gold after gold ore has been leached with NaCN solution.
 
EASY
12th ICSE
IMPORTANT
All In One ISC Chemistry Class 12>Chapter 19 - Sample Question Paper 4>SAMPLE QUESTION PAPER 4>Q 14
Explain the following observations: (i) Electrophilic substitution in the case of aromatic amines takes place more readily than benzene.
EASY
12th ICSE
IMPORTANT
All In One ISC Chemistry Class 12>Chapter 19 - Sample Question Paper 4>SAMPLE QUESTION PAPER 4>Q 14
Explain the following observations: (ii) Aryl cyanide can not be formed by the reaction of aryl halide and sodium cyanide.
EASY
12th ICSE
IMPORTANT
All In One ISC Chemistry Class 12>Chapter 19 - Sample Question Paper 4>SAMPLE QUESTION PAPER 4>Q 14

Explain the following observations:

Tertiary amines do not undergo acylation.

EASY
12th ICSE
IMPORTANT
All In One ISC Chemistry Class 12>Chapter 19 - Sample Question Paper 4>SAMPLE QUESTION PAPER 4>Q 15
Calculate the charge in coulombs required for the oxidation of 2 moles of water to oxygen. [Given,1F = 96500 C mol-1  ]