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 chemistry chemistry of non-metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

A bar of zinc generates a characteristic sound when bent, similar to_________.

  1. Tin cry

  2. Water splashing

  3. Glass breaking

  4. None of above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A bar of zinc generates a characteristic sound when bent, similar to tin cry. A tin cry is the characteristic sound heard when a bar of tin is bent. Variously described as a "screaming" or "crackling" sound, the effect is caused by the crystal twinning in the metal.

Multiple choice chemistry chemistry of non-metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

The most reactive metal among the following is:

  1. Fe

  2. Pt

  3. Ni

  4. Co
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The reactivity series is sometimes quoted in the strict reverse order of standard electrode potentials, when it is also known as the "electrochemical series":

$Li > Cs > Rb > K > Ba > Sr > Na > Ca > Mg > Be > Al > H( water) > Mn > Zn > Cr > Fe > Cd > Co$
$ > Ni > Sn > Pb > H(in acids) > Cu > Fe(+3) > Hg > Ag > Pd > Ir > Pt > Au $

So, according to this series, Iron is most reactive than $Pt, Ni, Co$
Multiple choice chemistry chemistry of non-metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

Metals have:

  1. high melting and boiling point

  2. low melting and boiling point

  3. high melting and low boiling point

  4. low melting and high boiling point
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

1) High melting and boiling point

2) Metallic bonding is the strong attraction between closely packed positive metal ions and a 'sea' of delocalised electrons.

3) The attraction between the metal ions and the delocalised electrons must be overcome to melt or to boil a metal.

4) These attractive forces are strong, so metals have high melting and boiling points.

Multiple choice chemistry chemistry of non-metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

A metal which is lighter than water is:

  1. lithium

  2. gold

  3. silver

  4. iron
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Lithium has a density of (0.534 g/cm3) which is lower than water (1 g/cm$^3$). Two other metallic elements are less dense than water. Potassium has a density of 0.862 g/cm$^3$ while sodium has a density of 0.971 g/cm$^3$. All of the other metals on the periodic table are denser than water. While lithium, potassium, and sodium are all light enough to float on water, they are also highly reactive.
Multiple choice chemistry chemistry of non-metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

An element is sonorous and highly ductile. Under which category would you classify this element? What other characteristics do you expect the element to possess?

  1. Metal

  2. Non-Metal

  3. Metalloid

  4. Semi-conductor
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Metal

Malleable high melting and boiling point, lustrous hard, high density and a good conductor of heat and electricity.

Multiple choice chemistry chemistry of non-metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

__and ___are alloys of copper.

  1. Brass and bronze

  2. Brass and alloy steel

  3. Copper pyrites and malachite

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

  • A homogeneous mixture of two or more elements is known as Alloys.
  • There are various alloys of copper:
Brass-Copper with zinc, Bronze-Copper with tin, and Coinage alloy-copper with nickel.
  • Hence, option  A is correct.

Multiple choice chemistry matter around us measurement of properties effect of temperature and pressure on states of matter general introduction: importance and scope of chemistry

The international standards of weight and measures are made of:

  1. gold silver alloys

  2. platinum - iridium alloys

  3. copper - gold alloys

  4. platinum - iron alloys
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The addition of 10% iridium to the platinum greatly increases its hardness and so reduces wear.Hence the international standards of weight and measures are made up of platinum and iridium alloys.
Multiple choice chemistry nitrogen and sulfur ammonia-properties and uses ammonia compounds of nitrogen - ammonia

Which of the following metal on burining in mosist air does not give smell of ammonia?

  1. $Mg$
  2. $Ca$
  3. $K$
  4. $Li$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Magnesium, calcium, and lithium react with atmospheric nitrogen when burned to form nitrides (Mg3N2, Ca3N2, Li3N), which release ammonia upon hydrolysis with moisture. Potassium is highly reactive but does not form a stable nitride under these conditions, so it does not produce ammonia.

Multiple choice commercial applications treasure under the ground conservation of mineral resources distribution and conservation of mineral resources indian mineral and power resources

Which metal is often termed as back-bone of modern civilization?

  1. Copper

  2. Iron

  3. Bauxite

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

Iron ore is the basic mineral and the backbone of industrial development. India is endowed with fairly abundant resources of iron ore. India is rich in good quality iron ores. Magnetite is the finest iron ore with a very high content of iron up to 70 per cent. 

Multiple choice commercial applications treasure under the ground conservation of mineral resources distribution and conservation of mineral resources indian mineral and power resources

Which metal or alloy is considered to be the backbone of manufacturing industries?

  1. Iron

  2. Aluminium

  3. Manganese

  4. Steel
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Steel is needed to manufacture a variety of engineering goods, construction material, defence, medical, telephonic, scientific equipment and a variety of consumer goods.
Steel, composed simply of iron and carbon, accounts for 90% of steel production. Low alloy steel is alloyed with other elements, usually molybdenum, manganese, chromium, or nickel, in amounts of up to 10% by weight to improve the hardenability of thick sections.
Multiple choice commercial applications treasure under the ground conservation of mineral resources distribution and conservation of mineral resources indian mineral and power resources

Which of the following is an example of a non-ferrous metal?

  1. Nickel

  2. Cobalt

  3. Copper

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

Non-ferrous minerals are those which do not have iron content in them like copper, bauxite, etc. They play a vital role in metallurgical, engineering and electrical industries.

Multiple choice commercial applications treasure under the ground conservation of mineral resources distribution and conservation of mineral resources indian mineral and power resources

The metals used in electric industry are _______.

  1. Copper

  2. Aluminum

  3. Mica

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

  • Being malleable, ductile and a good conductor, copper is mainly used in electrical cables, electronics  and chemical industries.
  • Aluminium is an important metal because it combines the strength of metals such as iron, with extreme lightness and also with good conductivity and great malleability.
  • Due to its excellent dielectric strength, low power loss factor, insulating properties and resistance to high voltage, mica is one of the most indispensable minerals used in electric and electronic industries.

Multiple choice commercial applications treasure under the ground conservation of mineral resources distribution and conservation of mineral resources indian mineral and power resources

Name the metallic minerals.

  1. Copper, Lime Stone, Iron, Silver

  2. Iron, Gold, Silver, Copper

  3. Diamond, Lime Stone, Iron, Silver

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

  • A mineral is a solid, naturally occurring combination of inorganic substances. Metallic minerals are minerals which contain one or more metallic elements.
  • Metallic minerals occur in rare, naturally formed concentrations known as mineral deposits. These deposits can consist of a variety of metallic minerals containing valuable metals such as nickel (pentlandite), copper (chalcopyrite), zinc (sphalerite), lead (galena) and gold (occurs as a native element or as a minor constituent within other minerals) that are used in all aspects of our daily lives.
  • Metallic minerals must be broken apart and chemically processed to extract the useful metal from the mineral.