Question

Determine which choice(s) is/are correct?

I. Stirring slows down (decreases) rate of dissolution.
II. Grinding solids increases their surface area of contact.
III. Heating slows down (decreases) rate of dissolution.
IV. Grinding solids speeds up their rate of dissolution.
A) I, II, and III
B) II and IV
C) I and III
D) III and IV

Answer 1

B) 2 AND 4 as rate of rxn is directly proportional to surface of contact ....smaller the particle faster the rxn