Question

Which of these is used to make cutting tools?

• A. platinum
• B. tin
• C. diamond
• D. graphite

Answer 1

The correct option is C

diamond

The explanation of the correct option:

(C) Diamond: Diamond is one of the hardest substances which occurs naturally.

• The atoms in diamonds are organized in a rigid three-dimensional structure and are tightly bonded to each other.
• The absence of large empty spaces in the diamond structure makes it an extremely hard substance which compels it to use as cutting tools such as glass cutter while graphite is a layered structure of carbon atoms and is very soft so, it cannot be used for making cutting tools.

The explanation for the incorrect option:

(A) Platinum: Platinum can not used to make cutting tool.

(B) Tin: Tin is a soft, silvery-white metal which can not used to make cutting tools.

(D) Graphite: Graphite is a soft which is a layered structure which can not used to make cutting tool.

Therefore, option (C) is correct. i.e., diamond is used to make cutting tools.