Overview of General Metallurgical Processes

Q.

List the physical and chemical properties of nitrogen.

Q.

What is gangue in chemistry?

Q. Which of the following ores are currently matched with their formula?
(I) $\text{Magnetite}\to F{e}_3{O}_4$
(II) $\text{Haematite}\to FeC{O}_3$
(III) $\text{Siderite}\to F{e}_2{O}_3$
(IV) $\text{Limonite}\to F{e}_2{O}_3.3H_{2}O$

1. I, IV
2. II, III
3. I, III
4. II, IV

Q.

What is ferroelectricity?

Q.

What are the constituents of solder alloy? Which property of solder makes it suitable for welding electrical wires?

Q.

What is the role of flux in metallurgical processes?

Q. In metallurgy the term "gangue" is used for :

1. Contamination of metals, other than desired metal.
2. Magnetic impurities in an ore.
3. Minerals which are naturally occuring in pure form
4. Contamination of undesired earthy materials.

Q. Which of the following is an ore of aluminium?

1. Bauxite
2. Borax
3. Colemnite
4. Kernite

Q.

What is an amalgam? Give two examples.

Q. Molecular formula of chromite is:

1. $FeC{r}_2{O}_4$
2. $F{e}_{2}C{r}_3{O}_4$
3. $FeCr{O}_3$
4. $C{u}_2{H}_{2}O$

Q.

A metal forms two oxides. The higher oxide contains 80% metal 0.72g of lower oxide gives 0.8g higher oxide when oxidised. Then the ratio of oxygen that combines with the fixed weight of metal in the two oxides will be?

Q. What is the appropriate order of processes for the extraction of lead from Galena?
A) Froth flotation B) Calcination C) Roasting D) Self Reduction E) Electrolytic Reduction F) Smelting

1. $C\to B\to D\to E$
2. $A\to C\to D$
3. $A\to C\to E$
4. $A\to C\to F$

Q.

Although carbon and hydrogen are better reducing agents but they are not used to reduce metallic oxides at high temperatures. Why?

Q. What is protonephridia?

Q.

Which is the cheapest and most abundant agent employed in the extraction of metals?

Q.

Name an ore, which is concentrated by:

1. Froth floatation process
2. Magnetic separation

Q. The ore that can be concentrated by magnetic separation method is:

1. bauxite $(A{l}_2{O}_3.x{H}_{2}O)$
2. pyrolusite $\left(Mn{O}_2\right)$
3. cuprite $\left(C{u}_{2}O\right)$
4. zincite $\left(ZnO\right)$

Q. Explain the magnetic separation method.

Q. What is amalgam ?

Q.

Which oxide is represented by the following structure?

1. P₄O₆

2. P₃O₅

3. P₄O₁₀

4. P₂O₄

Q. Extraction of aluminium from oxide $\left(A{l}_2{O}_3\right)$ is best done by:

1. Reduction of $A{l}_2{O}_3$ with $CO$
2. Electrolytic reduction of $A{l}_2{O}_3$
3. Reduction of $A{l}_2{O}_3$ with sodium
4. Reduction of $A{l}_2{O}_3$ with carbon

Q. Is there any chemical reaction between Aqua Regia and Gold or does it simply dissolves in its solution?

Q.

List-I (Metal)	List- II (Ores)
(a) Aluminum	(i) siderite
(b) Iron	(ii) siderite
(c) Copper	(iii) Kaolinite
(d) Zinc	(iv) Malachite

1. (a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)
2. (a) - (i), (b) - (ii), (c) - (iii), (d) - (iv)
3. (a) - (iii), (b) - (i), (c) - (iv), (d) - (ii)
4. (a) - (ii), (b) -(iv), (c) - (i), (d) - (iii)

Q. Explain calcination and roasting with example.

Q. Write the different stages involved in metallurgy.

Q. Purification of aluminum by electrolytic refining is known as

1. Serpeck’s process
2. Baeyer’s Process
3. Hoope’s Process
4. Hall’s Process

Q. Which of the following mixture can be separated by magnetic separation?

1. Iron filings, sand and iodine
2. Common salt, sand and marbles
3. Chalk powder, grain and chaff
4. Stone, salt and water

Q. Define the term metallurgy.

Q. In Bayer's process leaching is carried out using:

Q. give difference between ore and mineral ? in simple words.