Match the following: List I (Ore) List II (Composition)

Step 1: - Siderite is a mineral that primarily contains iron carbonate (\( FeCO_3 \)). Thus, it corresponds to composition III.
Step 2: - Malachite is a copper carbonate mineral (\( CuCO_3 . Cu(OH)_2 \)). Hence, it matches with V.
Step 3: - Sphalerite is a zinc sulfide mineral (\( ZnS \)). Therefore, it corresponds to I.
Step 4: - Zincite is an ore of zinc and contains zinc oxide (\( ZnO \)). Therefore, it matches with II. Thus, the correct matching is: \[ A-III, B-V, C-I, D-II \]
In Carius method for estimation of halogens, 180 mg of an organic compound produced 143.5 mg of AgCl. The percentage composition of chlorine in the compound is ___________%. [Given: Molar mass in g mol\(^{-1}\) of Ag = 108, Cl = 35.5]
Consider the following reaction occurring in the blast furnace. \[ {Fe}_3{O}_4(s) + 4{CO}(g) \rightarrow 3{Fe}(l) + 4{CO}_2(g) \] ‘x’ kg of iron is produced when \(2.32 \times 10^3\) kg \(Fe_3O_4\) and \(2.8 \times 10^2 \) kg CO are brought together in the furnace.
The value of ‘x’ is __________ (nearest integer).