Metallurgy PYQs - Last 5 Years

The metal purified by Mond process is $X$. The number of unpaired electrons in $X$ is

Which of the following are carbonate ores?
I. Siderite
II. Kaolinite
III. Calamine
IV. Sphalerite

Which of the following methods is useful for producing semiconductor grade metals of high purity?

\(\text { Match the following }\)
$$ \begin{array}{llll} \hline & \text { List-I (Process) } & & \text { List-II (Metal) } \\ \hline \text { (A) } & \text { Hall-Heroult process } & \text { (I) } & \mathrm{Ti} \\ \hline \text { (B) } & \t...

Which of the following is not associated with water molecules ?

Consider the following.
Statement-I In the extraction of Al by Hall-Heroult process, pure $\mathrm{Al}_2 \mathrm{O}_3$ mixed with $\mathrm{Na}_3 \mathrm{AlF}_6$ lowers its melting point and increases conductivity.
Statement-II Zirconium met...

Which of the following reactions is an example of roasting?

In the extraction of iron from haematite, the impurity $(x)$ of the ore is removed in the form of ' $y$ ', what are $x$ and $y$ respectively?

Which of the following is used as froth stabilizer in froth floatation process?

\(\text { Which of the following sets are correctly matched? }\)
$$ \begin{array}{cll} \hline & \text { Metal } & \text { Refining Process } \\ \hline \text { I. } & \mathrm{Hg} & \text { Distillation } \\ \hline \text { II. } & \mathrm{C...

The alloy that contains copper and Zn is $x$ and the one that contains copper and Ni is $y$. What are $x$ and $y$ respectively?

Kaolinite, a form of clay is the ore of metal $x$ and malachite is the ore of metal $y, x$ and $y$ respectively are

In the extraction of iron, the reaction which occurs at $900-1500 \mathrm{~K}$ in the blast furnace is

In which of the following metals extraction, impurities are removed as slag?
i. Al
ii. Fe
iii. Cu
iv. Zn
The correct option is

The flux used in the preparation of wrought iron from cast iron in reverberatory furnace is

The reactions which occur in blast furnace at $500-800 \mathrm{~K}$ during extraction of iron from haematite are
i. $3 \mathrm{Fe}_2 \mathrm{O}_3+\mathrm{CO} \longrightarrow 2 \mathrm{Fe}_3 \mathrm{O}_4+\mathrm{CO}_2$
ii. $\mathrm{Fe}_2 \ma...

The type of iron obtained from blast furnace in the extraction of iron is

Which one of the following sets in not correctly matched?

Lithium forms an alloy with ' $X$ '. This alloy is used to make armour plates. What is ' $X$ ' ?

How many of the following can be purified by using zone refining method?
Ni, B, Ti, In, Ge, Mn, Ag, Si, Ga

\(\text { Match the following. }\)


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The two major constituents of Portland cement are

A compound A is used in paints instead of
salts of lead. Compound A is obtained when a
white compound B is strongly heated.
Compound B is insoluble in water but
dissolves in NaOH solution forming a
solution of compound C. The compound A on
...