In which of the following sets allotropes of carbon are correctly matched with their uses? i. graphite - crucibles ii. activated charcoal - water filters iii. carbon black - fuel The correct answer is

Step-by-step solution

A graphite crucible is a container used for melting and casting non-ferrous, non-iron metals shape as gold, silver, aluminium. Activated charcoal is the ideal water filter because it remove toxins from water without stripping the water of salt and important minerals. Black carbon is used as a colorant and reinforcing filler in tires and other rubber products. So, only (i) and (ii) are true.