Question

11 (b). A material A can exist in three physical i.e. solid, liquid, and gas. No living thing on earth can exist in the absence of this material. It falls from the clouds in the form of B. Lack of B for long period in an area may cause C whereas an excess of B may cause D.

What is the solid state of ‘A’ known as?

Answer 1

• According to the given information, A can exist in three physical states i.e. solid, liquid, and gas, and no living thing on earth can exist in the absence of this material.
• Therefore, the given material is water because it also exists in three states i.e. solid, liquid, and gas, and also without water, no living thing on earth can survive.
• So, A is water.
• The solid state of A (water) is ice.
• Ice is formed when water freezes at 0°C.