Which of the following colloids cannot be formed by direct mixing?

When hit by light, what happens to a colloidal mixture?

Which of the following is not an example of lyophilic colloids?

Which of the following is not an example of lyophobic colloids?

Which of the following does not occur at the interface of phase?

What is the amount of intermediate formed when initial amount is 300 and final amount is 700?

Promoter decreases the activity of catalyst.

Under which category is colloidal system?