There is a general tendency for liquids to conduct electricity better than solids due to a) the mobility of particles in a liquid rather than their fixed positions in a solid. b) solids having a higher density than liquids. c) liquids having a lower melting point than solids. d) the liquids taking the shape of the container whereas a solid does not.

 A) the mobility of particles in a liquid rather than their fixed positions in a solid.

There is a general tendency for liquids to conduct electricity more than solids due to the mobility of particles in a liquid rather than their fixed positions in  a solid.

Explanation:

Substances are classified into solids, liquids and gases based on the freedom movement of their individual particles. In solids the particles are thickly packed which allows them hardly any freedom of movement. But liquid particles have greater freedom of movement than solids particles.

This is the reason for the better conduction of electricity by liquids when compared with solids.  Movement of charges from one point to the other is called electricity and when the particles of a conducting medium has greater freedom of movement electricity flow will be easier.  

Correct option is (A).

the answer is b.) hydrogen bonds between bases.

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