Question

Washing soda on strong heating gives sodium oxide and carbon dioxide.
(A) True.
(B) False.

Answer 1

We know that this is a thermal decomposition reaction. The reaction product is oxide which is used in ceramics and glass. The product is the base anhydride of sodium hydroxide. And it is prepared by the reaction of sodium with sodium hydroxide, sodium peroxide, or sodium nitrite.

Complete answer:
Heating of $N{{a}_{2}}C{{O}_{3}}$ is a thermal decomposition reaction so we can say when $N{{a}_{2}}C{{O}_{3}}$ heats it undergoes thermal decomposition and get decomposed. This decomposition takes place at . The reaction of thermal decomposition of will be $500{}^\circ C.$
The reaction of thermal decomposition of $N{{a}_{2}}C{{O}_{3}}$ will be:
$N{{a}_{2}}C{{O}_{3(s)}}\to N{{a}_{2}}{{O}_{(s)}}+C{{O}_{2(g)}}$
From the above reaction, it shows that washing soda $N{{a}_{2}}C{{O}_{3}}$ on heating gives sodium oxide and carbon dioxide. Heating results in decomposition in sodium oxide and carbon dioxide. The product will be sodium oxide and carbon dioxide.
Therefore, Washing soda on strong heating gives sodium oxide and carbon dioxide is true.

Additional Information:
Sodium carbonate is a food additive. It is used as an acidity regulator, stabilizer and also as an anticaking agent and raising agent. It is also a component of a solution of alkaline salts called kansui which is used to give ramen noodles their flavour and taste. In cooking it is sometimes used in the place of sodium hydroxide (for lying). Sodium carbonate changes the pH of the food and improves browning. Sodium carbonate is corrosive with cookware, foil and utensils of aluminium.

Note:
Remember that $N{{a}_{2}}C{{O}_{3}}$ is an inorganic compound having the chemical name sodium carbonate and it is also known as washing soda. It is a strong alkali base. It is used in green cleaning products. And also found in powder form. It is also applied in a wide range of industries for example in cleaning and personal care products and also used as a fungicide, microbicide, herbicide and pH adjuster. It is also used in manufacture of glass and for water softening.