Match List-I and List-II : List-I List-II a Haematite i Al 2 O 3 · xH 2 O b Bauxite ii Fe 2 O 3 c Magnetite iii CuCO 3 · Cu ( OH ) 2 d Malachite iv Fe 3 O 4 Choose the correct answer from the options given below :

( a ) - ( ii ) , ( b ) - ( i ) , ( c ) - ( iv ) , ( d ) - ( iii )

( a )-( ii ), ( b )-( iii ),( c )-( i ),( d )-( iv )

( a )-( iv ) , ( b ) - ( i ) , ( c ) - ( ii ) , ( d ) - ( iii )

( a )-( i ), ( b )-( iii ), ( c )-( ii ), ( d )-( iv )

In the process of metallurgy, the ores used are first crushed and powdered, and then concentrated by various methods. Following the concentration, the metal is now extracted from the ore. To achieve this, the ore is first converted into a compound which is easy to reduce. This is achieved by various methods including calcination. Calcination is a process of converting an ore into its metal oxide, by heating the ore in limited supply or absence of air, at a temperature which is just below its melting point. In this process, the moisture is removed, the volatile impurities get expelled, and the carbonate ores are converted into oxide ores since they are easy to reduce.

Consider two chemical reactions (A) and (B) that take place during metallurgical process: (A) ZnCO 3 s ⟶ Δ ZnO s + CO 2 g (B) 2 ZnS s + 3 O 2 g ⟶ Δ 2 ZnO s + 2 SO 2 g The correct option of names given to them respectively is:

(A) is calcination and (B) is roasting

Both (A) and (B) are producing same product so both are roasting

Both (A) and (B) are producing same product so both are calcination

(A) is roasting and (B) is calcination

Match List- I with List- II . List- I List- II (a) Siderite (i) Cu (b) Calamine (ii) Ca (c) Malachite (iii) Fe (d) Cryolite (iv) Al (v) Zn Choose the correct answer from the options given below:

a → iii , b → v , c → i , d → iv

a → iii , b → i , c → v , d → ii

a → i , b → ii , c → v , d → iii

a → i , b → ii , c → iii , d → iv

Match List- I with List- II . List- I (Ore) List- II (Element Present) a Kernite p Tin b Cassiterite q Boron c Calamine r Fluorine d Cryolite s Zinc Choose the most appropriate answer from the options given below:

a → q , b → p , c → s , d → r

a → r , b → p , c → q , d → s

a → q , b → s , c → p , d → r

a → p , b → r , c → s , d → q

MEDIUM

Earn 100

What is the difference between roasting and calcination? Give one example for each.

Important Questions on General Principles and Processes of Isolation of Metals (Metallurgy)

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Conversion of Ores into Oxide

In the isolation of metals, calcination process usually results in:

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Conversion of Ores into Oxide

Calamine is an ore of:

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Conversion of Ores into Oxide

Which among the following is not a mineral of iron?

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Conversion of Ores into Oxide

Calamine, malachite, magnetite and cryolite, respectively are:

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Conversion of Ores into Oxide

The process that involves the removal of sulphur from the ores is :

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Conversion of Ores into Oxide

Name the most common ore of the metal aluminium from which the metal is extracted. Write the chemical formula of the ore.

MEDIUM

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Conversion of Ores into Oxide

The major products of the following reaction are

ZnS (s) + O_{2} (g) \overset{heat}{\to}

EASY

Chemistry>Inorganic Chemistry>General Principles and Processes of Isolation of Metals (Metallurgy)>Conversion of Ores into Oxide

Match List-I and List-II :

	List-I		List-II
a	Haematite	i	${Al}_{2} O_{3} \cdot {xH}_{2} O$
b	Bauxite	ii	${Fe}_{2} O_{3}$
c	Magnetite	iii	${CuCO}_{3} \cdot Cu (OH)_{2}$
d	Malachite	iv	${Fe}_{3} O_{4}$