Question

colloid is not a substance but a state of substancecolloid is not a substance but a state of substance

Answer 1

"Colloid is not a substance but a state of substance ". This is a true statement because a substance may be a colloid in one condition and may behave as a crystalloid in another. The substance basically behaves as colloid when it's particle/solute size is 1nm to 1000 nm .
For eg :
NaCl which is a crystalloid in aqueous medium and colloid in benzene medium.