Which does not show the Tyndall effect?
1. Emulsion
2. Blood
3. Milk
4. Sugar solution
Alum helps in purifying water by:
1. Forming Si complex with clay particles.
2. Sulphate part which combines with the dirt and removes it.
3. Aluminium which coagulates the mud particles.
4. Making mud water soluble.
Which is an emulsion?
1. Boot polish
2. Lipstick
3. Shampoo
4. All of these
Which ion is adsorbed when a diluted aqueous solution of AgNO3 (excess) is added to KI solution, resulting in formation of positively charged sol particles of AgI?
1. K+
2. Ag+
3. I-
4. NO3-
The charge on As2S3 sol is caused by the adsorption of:
1. H+
2. OH-
3.
4. S2-
Cloud bursts are caused by?
1. | Attraction towards the electrical charges on the earth. |
2. | Large amount of water present in the cloud. |
3. | Dense clouds are present in the upper atmosphere. |
4. | Mutual discharge of oppositely charged clouds resulting in the coagulation. |
Which acts as poison for Pd-charcoal in lindlar's catalyst ?
1. BaSO4
2. Quiniline
3. Both 1. and 2.
4. None of these
Hydrolysis of maltose (C12H22O11) by maltase gives:
1. glucose
2. fructose
3. both 1 and 2
4. none of these
What is the most effective electrolyte for precipitating Fe(OH)3 sol?
1. NaCl
2. BaSO4
3. AlCl3
4. Na3PO4
Adsorption of log(x/m) and log P was found of the following type. This is true when:-
1. n =
2. 1/n = 1
3. P = 0
4. 1/n =
Colloidal solution of gold prepared by different methods of different colours because of:
1. different diameters of colloidal gold particles
2. variable valency of gold
3. different concentration of gold particles
4. impurities produced by different methods
Graph between log and log P is a straight line inclined at an angle - 45°. When pressure of 0.5 atm and log k = 0.699, the amount of solute adsorbed per g of adsorbent will be
(1) 1 g/g adsorbent
(2) 1.5 g/g adsorbent
(3) 2.5 g/g adsorbent
(4) 0.25 g/g adsorbent