Chlorine is a chemical that is widely used in the treatment of pools. it eliminates bacteria and algae by disinfecting & oxidizes other agents like dirt. when chlorine is added to a pool, a reaction occurs in which a weak acid called hypochlorous acid is produced. chlorinated pools are usually treated with a chemical called calcium hypochlorite, ca(clo)2. pure chlorine (cl2) is not used for all the reasons below except one. which one? a) it is highly toxic b) it has a putrid odor c) it is a noble gas and therefore not reactive d) it is a gas and therefore difficult to handle

Correct answer is C.

Explanation: Chlorine is the 17th element in the periodic table that has an electronic configuration of which has 1 electron less than the stable [Ar] gas and is very reactive in nature.

Chlorine element is present in the form of gas that has a pungent odor and is highly toxic in nature.

Option A, B and D are the ones which shows the actual property of the Chlorine, why we do not use pure chlorine but Option C is the only option that does not show the correct property of pure chlorine.

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.