Arrange the following in decreasing Lewis acid strength -PF3, PCI3, PBr3, Pl3
Answer: A
(a) Pl3 > PBr3 > PCl3 > PF3
The substances which behave as colloidal solutions at higher concentration are called
Answer: A
(a) associated colloids
Which of the following is not a method of removing impurities from a colloidal sol?
Answer: D
(d) Distillation
Movement of dispersion medium under the influence of electric field is known as
Answer: C
(c) electroosmosis
Why is alum added to water containing suspended impurities?
Answer: B
(b) To coagulate the suspended impurities