Match List I with List II
|
List I |
List II |
|
A. Haemoglobin |
I. Negatively charged sol |
| B. Acid dye stuff | II. Methylene blue sol |
| C. Gold solution | III. Positively charged sol |
| D. Basic dye stuff | IV. Eosin |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is (1) A-III, B-IV, C-I, D-II
|
List I |
List II |
|
A. Haemoglobin |
III. Positively charged sol |
|
B. Acid dye stuff |
IV. Eosin |
|
C. Gold solution |
I. Negatively charged sol |
|
D. Basic dye stuff |
II. Methylene blue sol |
Haemoglobin is a protein that carries oxygen in the blood. It is a negatively charged sol because it contains acidic groups such as carboxyl \((-COOH)\) and phosphate groups \((-PO_4^{2-})\).
Acid dye stuff are dyes that dissolve in acidic solutions. They are positively charged sols because they contain acidic groups such as sulphonic \((-SO_3H)\) and carboxylic \((-COOH)\) groups.
Gold solution is a colloidal solution of gold particles. It is a negatively charged sol because the gold particles are coated with citrate ions \((C_6H_5O_7^{3-})\).
Basic dye stuff are dyes that dissolve in basic solutions. They are positively charged sols because they contain basic groups such as amino \((-NH_2)\) and imino \((-NH-)\) groups.
Examples of acid dye stuff: Eosin, Orange II, Methyl Orange
Examples of basic dye stuff: Methylene blue, Crystal Violet, Safranin