Complete and balance the following equations:

(a) Al₂O₃ + 2NaOH ⟶

(b) C₂H₅COONa + NaOH $\overset{\text{Δ}}{\underset{\text{Cao}}{\longrightarrow}}$

(c) C₂H₄Br₂ + alcoholic KOH $\overset{\text{Δ}}{\longrightarrow}$

Choose the organic compound from the list given below to answer the following questions:

$\boxed{\text{Ethene, Ethanoic acid, Ethanol, Methanal}}$

(a) The compound which does not have a double bond in its structure.

(b) The compound which in its pure form turns into an ice like solid on cooling.

(c) The compound which is used for artificial ripening of fruits.

Differentiate between the following pairs based on the criteria given:

(a) Sulphuric acid and Nitric acid (using barium chloride solution)

(b) Unsaturated and Saturated hydrocarbons (type of bond present)

Calcium carbonate reacts with dilute hydrochloric acid as given below:

CaCO₃ + 2HCl ⟶ CaCl₂ + H₂O + CO₂

(a) What is the mass of 5 moles of calcium carbonate? (Relative molecular mass of calcium carbonate is 100)

(b) How many moles of HCl will react with 5 moles of calcium carbonate?

(c) What is the volume of carbon dioxide liberated at S.T.P. at the same time?