Which statement is true concerning colloids?

Option D

Explanation:

The complete question is

Which statement is true concerning colloids?

A.It carries a net electric charge

B.It consists of one phase only

C.It can be made out of two gases

D.It is electrically neutral as a whole

Solution

The particles with in the colloids are either positively or negatively charged due to presence of molecular electrolyte. The charged particles do not cluster together due to repulsion force. However, these charged particles align along two different layers - one positive layer and the other negative layer.

The net charge reduces to zero because of two forces in equal amount due to presence of equal number of positive and negative charges

Hence, option D is correct

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.