Pure water is a poor conductor of electricity. when sodium chloride (nacl) is dissolved in water, however, the solution becomes a good conductor of electricity. which of the following statements explains this change in conductivity? a. the nacl molecule changes and becomes a covalent bond when dissolved in water. b. the nacl dissociates into na+ and cl- ions, which are able to carry the charge. c. the nacl breaks down the water molecules creating charged oxygen and hydrogen ions. d. the nacl reacts with water to form the electrically charged compounds hcl and na2o.

Option (B) is the correct answer.

Explanation:

NaCl is a polar compound as it contains an ionic bond between sodium atom and chlorine atom.

Also, it is known that like dissolves like. So, when we add NaCl in water then sodium chloride will dissociate into ions as it will form ions and ions.

These ions will help in the flow of electrons when electric current is passed through a solution of NaCl.

Thus, we can conclude that the statement, the NaCl dissociates into and ions, which are able to carry the charge.

the correct choice is a .

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the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force