Question

Calcium bicarbonate is known in solid state.
A.True
B.False

Answer 1

Any water in contact with the atmosphere absorbs carbon dioxide and accumulates metal ions, most commonly calcium and magnesium when these water molecules come into contact with rocks, sediments and other such materials. So that most natural water that comes from streams, lakes, and particularly wells, can be viewed as dilute solutions of these bicarbonates.

Complete step by step answer:
Let’s look into the physical properties of calcium bicarbonate first.
Calcium bicarbonate is an ionic compound which is made up of calcium, hydrogen, oxygen and carbon. It can be prepared by the reacting calcium carbonate with carbonic acid.
Now, coming to the question,
Calcium bicarbonate is not a solid that exists naturally, but it is formed in water as carbon dioxide dissolves calcium, carbonate and bicarbonate ions. Owing to the water's proximity to the air and its interaction with rocks and sediments that contain minerals and metals, this typically occurs within rivers, streams, lakes and well water.
If carbon dioxide-bearing water flows into limestone or other minerals bearing calcium carbonate, much of the calcium carbonate is dissolved, thereby becoming richer in bicarbonate. The residual carbon dioxide from the bicarbonate solution is released when the groundwater reaches the cave, allowing the much less soluble calcium carbonate to be deposited.
From the above explanations, it is clear that calcium carbonate is not a naturally occurring solid.

So the above statement is false.

Note:
Because of the mineral content and alkalizing effect, water with calcium bicarbonate is safe to drink, but it can create build-up in your bathroom and kitchen and be hard to clean. This also gets deposited as carbonate scales in pipes and reacts with soap to form a material called scum.