Applications of Colloids

Q. Calculate the degree of ionization of 0.04 M HOCI solution having ionization constant 1.25 x 10^{-4}?(4) 0.05(3) 0.5(1) 0.025 (2) 0.25

Q. Glutamic acid $H_{2}N-CH\left(C{H}_{2}C{H}_{2}COOH\right)-COOHN$ has $p{K}_{a1}(\alpha -COOH)=2.2,pKa2\left(RgroupCOOH\right)=4.3$. The isoelectric point of glutamic acid is

1. 5.9
2. 7
3. 10.2
4. 3.2

Q. An equimolar mixture of NaX2O4 and H2C2O4 acid required V1L of 0.1M KMnO4 in acidic medium to complete oxidation.same mixture required V2L of 0.1 M NaOH for neutralisation . calculate the ratio of V1 and V2

Q. 81. How to identify which salt is strong or weak and which salt is acidic or basic?

Q.

Which one of the following statements is correct :

i) Brownian movement is more pronounced for smaller particles than for bigger ones

ii) Sols of metal sulphides are lyophilic

iii) Schulze-Hardey law states, the bigger the size of the ion, the greater is its coagulating power

iv) One would be expect charcoal to adsorb chlorine more strongly hydrogen sulphide

1. i , iii

2. i, iii & iv

3. ii, iv

4. i, iii

Q.

Which of the following electrolytes is least effective in causing flocculation of

ferric hydroxide sol

[MNR 1991; UPSEAT 1999]

1. 
2. 
3. 
4. 

Q.

On addition of 0.8 mL of solution of 10% NaCl to 30 mL of red gold sol in presence of 0.03 g of starch, the coagulation is just prevented. The gold number of starch is

1. 0.09

2. 0.4

3. 0.0375

4. 5

Q. 50. Did there is any way to know the charge on compound ion like OH etc.?

Q. ionisation potential(IP) order N, P, O,

Q.

Which of the following is most effective in coagulating a ferric hydroxide sol [MP PET 1993, 97; M

1. 
2. 
3. 
4. 

Q. Which of the following statement is incorrect regarding lyophilic colloids?

Q.

Purple of Cassius is

1. Colloidal solution of gold

2. Colloidal solution of Sulphur

3. Colloidal solution of platinum

4. Oxyacids of gold