Chemistry · General Awareness

Chemistry of Metals and Alloys

1,762 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

Which of the following metals is the most reactive?

  1. Calcium

  2. Iron

  3. Aluminium

  4. Copper

  5. Lead
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Calcium is the most reactive according to the reactivity series (activity series) of metals. Decreasing chemical reactivity is: K > Na > Ca > Mg > Al > Zn > Fe > Sn > Pb > H > Cu > Hg > Ag > Au

Multiple choice

Which of the following articles undergo(es) corrosion?

  1. Iron

  2. Gold

  3. Silver

  4. Both (1) and (2)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Iron is shiny grey but it reacts with water vapours and oxygen present in air. After the reaction, its surface gets covered with the coating of a brown flaky substance called rust. Rust is mainly hydrated ferric oxide (Fe2O3.xH2O). Both gold and silver are unreactive in nature.

Multiple choice

Which of the following statements is incorrect?

  1. Mn is the third most abundant transition element in the earth’s crust.

  2. Constantan is a copper-nickel alloy.

  3. [NiCl4]2- is paramagnetic in nature.

  4. Mn2+ is oxidising in nature.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The change from Mn2+ to Mn3+ results in the half-filled d orbital (d5), which has extra stability. Hence, Mn2+ is reducing in nature.

Multiple choice

Which of the following statements is not true?

  1. Wrought iron is the purest form of iron.

  2. Percentage of silver in German silver is about 10 percent.

  3. Solder is an alloy of tin and lead.

  4. Transition metal present in Vit. B12 is cobalt.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

German silver is a copper alloy with nickel and often zinc. German silver is named for its silvery appearance, but it contains no elemental silver.

Multiple choice

Which of the following has the least enthalpy of atomisation?

  1. Vanadium

  2. Cobalt

  3. Copper

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

In all transition metals (except Zn, electronic configuration: 3d10 4s2), there are some unpaired electrons that account for their stronger metallic bonding.
Due to the absence of these unpaired electrons, the interatomic electronic bonding is the weakest in Zn and as a result, it has the least enthalpy of atomisation (126 KJ/mol).

Multiple choice

Which metal is not found in crude oil?

  1. Mg

  2. Ni

  3. V

  4. Cr
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Crude oil contains trace amounts of metals including magnesium (Mg), nickel (Ni), and vanadium (V) which occur naturally in petroleum. Chromium (Cr) is not typically found in crude oil deposits. These metals can poison catalysts during refining and need to be removed.

Multiple choice

Door locks are made of metals because metals

  1. have lustre

  2. are opaque

  3. are insoluble in water

  4. are hard and strong

  5. are naturally available
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Yes, due to the hardness and the strength of the metals, door locks are made up of metals.