The element that can be refined by distillation is
(a) nickel
(b) zinc
(c) tin
(d) gallium

Q: Why can't we use distillation for all metals?

Most metals have extremely high boiling points (often above $2000^\circ\mathrm{C}$). Heating them to such temperatures is practically difficult and highly energy-intensive. Distillation is only economical for volatile metals.

Q: What exactly are the impurities left behind?

The impurities are usually other metals or compounds present in the ore that have significantly higher boiling points than the volatile metal being refined. Because they don't vaporize at the operating temperature, they stay in the boiling flask.

Q: How is Tin (Sn) refined if not by distillation?

Tin is refined using a process called **Liquation**. This method exploits the difference in *melting points* rather than boiling points. Tin has a low melting point, so it melts and flows away, leaving higher-melting impurities behind.

Q: What about Nickel? How do we purify it?

Nickel is purified using **Mond's Process**, which is a type of vapour phase refining. Impure nickel is reacted with carbon monoxide to form a volatile complex, nickel tetracarbonyl, which is then decomposed at a higher temperature to yield pure nickel.

Q: Why is Gallium refined differently?

Gallium is often used in semiconductors, which require ultra-high purity. It is refined using **Zone Refining**, a method based on the principle that impurities are more soluble in the molten state of the metal than in the solid state.

Question

The element that can be refined by distillation is

Options:

(A) nickel

(B) zinc

(C) tin

(D) gallium

Sigma Percentile · Accepted Answer

### The Art of Purification
Imagine you have a chunk of metal, but it's riddled with impurities. How do you separate the good stuff from the bad? In metallurgy, we have an entire arsenal of refining techniques, and choosing the right one is like picking the perfect tool for a specific job. It all comes down to the unique physical properties of the metal in question.

### The Power of Boiling Points
Distillation is a classic technique that you might have seen in a chemistry lab. It relies on a very simple yet powerful concept: the difference in boiling points.

When we heat a mixture, the substance with the lower boiling point will vaporize first. If our target metal is highly **volatile**—meaning it boils easily—we can simply heat the impure mixture until the metal turns into a gas. The impurities, which typically have much higher boiling points, are left behind in the boiling flask like unwanted guests.

### The Volatile Suspects
So, which metals are volatile enough for this to work? If you look at Group 12 of the periodic table, you'll find Zinc ($Zn$), Cadmium ($Cd$), and Mercury ($Hg$). These elements have completely filled d-orbitals, which leads to relatively weak metallic bonding.

Because their atoms aren't holding onto each other very tightly, it doesn't take much thermal energy to break them apart. Thus, they have unusually low boiling points. When we heat impure Zinc, it readily vaporizes. The Zinc vapour travels through a condenser, cools down, and drips into a receiving flask as beautifully pure metal.

### What About the Others?
It's crucial to know why the other options are incorrect.

- **Nickel ($Ni$)** is refined using **Mond's Process**, where it reacts with carbon monoxide to form a volatile complex that is later decomposed.

- **Tin ($Sn$)** has a low melting point, so it is refined by **Liquation**. It simply melts and flows away from solid impurities.

- **Gallium ($Ga$)** is used in high-tech semiconductors and requires extreme purity, achieved through **Zone Refining**.

By understanding the physical personality of each metal, you can easily deduce the correct refining method!

Animated Solution for Chemistry - Metallurgy: The element that can be refined by distillation is

Select Answer:

Visualized Solution

$Distillation Setup$

$Principle of Distillation$

$Volatile Metals$

$Vaporization$

$Condensation$

$Other Refining Methods$

The Sigma Insight: Refining of Metals

The Art of Purification Imagine you have a chunk of metal, but it's riddled with impurities

The Power of Boiling Points Distillation is a classic technique that you might have seen in a chemistry lab

The Volatile Suspects So, which metals are volatile enough for this to work? If you look at Group 12 of the periodic table, you'll find Zinc ( $Z n$ ), Cadmium ( $C d$ ), and Mercury ( $H g$ )

What About the Others?

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