Chemistry · General Awareness

Chemistry of Metals and Alloys

1,851 Questions

Review the physical and chemical properties of various metals and their common alloys. This collection covers industrial applications, metallurgical processes, and practical uses of elements like silicon and boron. Practice these questions to strengthen your chemistry fundamentals for exams.

Properties of metalsCommon alloysIndustrial metallurgyChemical applications

Chemistry of Metals and Alloys Questions

Multiple choice chemistry changes around us effects of oxidation reactions in daily life corrosion of metals electroplating and its application

Which metals does not corrode easily?

  1. Gold

  2. Iron

  3. Aluminium

  4. Zinc
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In the activity series, metals are on the top of the series react and corrode easily as these metals are highly reactive like iron corrodes easily in the presence of water and air forming its oxide layer while metals present at the bottom are least reactive and do not corrode easily like gold, silver and platinum are some of them.


Option $(A)$ is correct.

Multiple choice chemistry changes around us effects of oxidation reactions in daily life corrosion of metals electroplating and its application

A shiny brown-coloured element 'X' on heating in air becomes black in colour. Name the element 'X'?

  1. Sodium

  2. Calcium

  3. Copper

  4. Aluminium
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

'X' is copper (Cu) and the black-coloured compound formed is copper oxide(CuO). The equation of the reaction involved on heating copper is given below:

$\underset{(Shiny\,brown\,in\,colour)}{2Cu} + O _2 \overset{Heat}{\rightarrow} \underset{(Black\,in\,colour)}{2CuO}$

Multiple choice chemistry changes - physical and chemical effects of oxidation reactions in daily life corrosion of metals electroplating and its application

Which metal is protected by a layer of its own oxide?

  1. $Al$
  2. $Ag$
  3. $Au$
  4. $Fe$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Aluminium in air is ordinarily protected by a molecule-thin layer of its own oxide. This aluminium oxide layer serves as a protective barrier to the underlying aluminium itself and preventing chemical reactions with the metal.

Multiple choice thermodynamic principles of metallurgy general principles and processes of isolation of elements metallurgy chemistry

Which of the following metals can be used for sharp casting?

  1. Iron

  2. Copper

  3. Aluminium

  4. Silver
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Casting is a manufacturing process by which a liquid material is usually poured into a mold, which contains a hollow cavity of the desired shape, and then allowed to solidify. The solidified part is also known as a casting, which is ejected or broken out of the mold to complete the process. Iron is the best metal amongst the given options for sharp casting.

Multiple choice thermodynamic principles of metallurgy general principles and processes of isolation of elements metallurgy chemistry

Which of the following can be obtained by hydrometallurgy :

  1. Copper

  2. Gold

  3. Silver

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Hydrometallurgy is a method for obtaining metals from their ores. It is a technique within the field of extractive metallurgy involving the use of aqueous chemistry for the recovery of metals from ores, concentrates, and recycled or residual materials.

Hydro metallurgy : (Ag, Au, Cu) –  This is wet metallurgy process. 
$Cu \rightarrow Pyro + Hydro $
$Ag$ and $Au \rightarrow$ By cynide process

Steps are : (i) Complex formation (ii) Metal displacement
Multiple choice chemistry materials: metals and non-metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

Metals are lustrous.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Metals are lustrous because of the free electrons present in them. The free electrons can move freely in the metal causing any light incident on them to get reflected back. This reflection is specular reflection rather than diffused and thus the metal surface appears shiny or lustrous.
Hence, option $A$ is correct.

Multiple choice

Which of the following is an example of a transition metal?

  1. Iron

  2. Copper

  3. Gold

  4. Sodium
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Iron is a transition metal, characterized by its partially filled d orbitals.

Multiple choice

What is the most common metal used in jewelry making?

  1. Gold

  2. Silver

  3. Platinum

  4. Copper
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Gold is the most common metal used in jewelry making because it is malleable, ductile, and has a beautiful luster.