Chlorine ion will attack the carbocation and double bond will not be created
Explanation:
The use of concentrated hydrochloric acid wiill be a poor choice as the acid catalyst for the formation of cyclohexane by dehydration of cyclohexanol because of the following reasons:
1) There will be presence of chlorine ions and they will attack the carbocation to form a single bond.
2) The formation of double bond will not occur in the process.
Therefore, it is a poor choice to use concentrated hydrochloric acid as the acid catalyst for the formation of cyclohexane by dehydration of cyclohexanol.
The law of universal gravitation states that gravitational force (weight) is equal to G(m1+m2)/r, and G is a constant number. m is mass and r is radius, so the answer is A.