1.Colloids and crystalloids differ in -------
a. charge on particle
b. particle nature
c. particle size
2. which one of the following does not form lyophilic sol?
3. The half life of a radioactive isotope is 50 minutes. Its decay constant is ___.
4. The compound H4SiO4 represents
b. silicic acid
c. orthosilisic acid
5. On treatment with cold hydroiodic acid, diethyl ether gives: ________ .