An evaporuter system concentraing a weak liquor from 5% to 50% Solids handls 100kg of solid per hour. if the same is to concentrate a weak liquor from 4% to 35%, find the capacity of the system in term of solids that can be handlied Per hour assuming water evaporatin to be same in both the eases

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.