Question

Assertion (A) - Sodium Hydrogen Carbonate is used in fire extinguishers. Reason (R) - Sodium Hydrogen Carbonate is a mild base​

Answer 1

Answer:

Sodium hydrogen carbonate or sodium bicarbonate is used as a fire extinguisher. When heated to a high temperature, the chemical properties of this salt make it produce lots of carbon dioxide and remove oxygen. This reduces the amount of oxygen and puts the fire out. The reaction also produces a small quantity of water and sodium carbonate as by-products.

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Answer 2

Answer:

Assertion is correct and reason is

Explanation:

• Sodium Hydrogen carbonate is also known as sodium bicarbonate. It is produced by the reaction between a strong base such as NaOH and a weak acid such as H2CO3.

• When sodium hydrogen carbonate is heated at high temperature it produces a huge amount of carbon dioxide. Carbon dioxide thus produced, blocks the access of oxygen to the fire. Eventually, under the absence of oxygen fire is extinguished.

• It is also a mild base as it is prepared from the reaction between a strong base and weak acid. It acts as a weak base and its pH is 8.3.

Thus, assertion and reason both are correct.