Question

The function of the quick lime mixture is to:
A.Absorb moisture present in soda lime
B.Increase the efficiency of soda lime
C.Increase the pH of soda lime
D.Take part in reaction with NaOH

Answer 1

Hint: To answer this question, recall the properties of quick lime. Quick lime shows the formula $CaO$. Calcium oxide production usually involves thermal decomposition of raw materials like limestone or seashells that contain calcium carbonate.

Complete step by step answer:
The process of production is known as calcination which involves the use of e burnt lime is known as. The process involves thermal decomposition of reactant species at very high temperature but not more than the melting point of the reactant species. The reactant species majorly uses $CaC{O_3}$ which undergoes thermal degradation \[{1070^o}C - {1270^o}C\]. Physical features of quick lime include odourless solid, white or greyish colour and exist as hard lumps. It causes a strong irritation to skin, eyes and mucous membranes. It plays an instrumental role in insecticides and fertilizers. The $CaO$ is a good absorbent and has high efficiency for absorption of water molecules.

Hence, we conclude that the correct option is option A.

Note:
The important properties of Calcium Oxide:
-Quick lime is an amorphous white solid with a high melting point of \[{2600^o}C\]. This shows that this is a very stable compound and can withstand high range temperatures.
-The important reaction is the formation of slaked lime. This process is called the slaking of lime\[{\mathbf{CaO}} + {{\mathbf{H}}_{\mathbf{2}}}{\mathbf{O}}{\text{ }} \to {\text{ }}{\mathbf{Ca}}{\text{ }}{\left( {{\mathbf{OH}}} \right)_{\mathbf{2}}}\]
-It is an oxide that is basic in nature and forms salts when it comes in contact with an acid.
-This compound crystallizes in a cubic crystal lattice.
-The standard molar entropy associated with calcium oxide corresponds to 40 joules per mole kelvin.
-This compound is known to emit an intense glow when it is heated to temperatures above \[{2400^o}C\]