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 physics heat energy transfers heat and heat transfer heat energy transfer transfer of heat

Iron, lead and brass spheres of equal masses are heated to a common temperature and are kept on a sheet of wax. The sphere that passes through the plate first is (lead 0.03 $\operatorname { cal } / \mathrm { g } / ^ { \circ } \mathrm { C }$, iron 0.11 $\operatorname { cal } / \mathrm { g } / ^ { \circ } \mathrm { C }$, brass 0.08 $\operatorname { cal } / \mathrm { g } / ^ { \circ } \mathrm { C }$) 

  1. lead

  2. brass

  3. iron

  4. all at the same time
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The rate of heat transfer through the spheres depends on their specific heat capacity. Since they have equal masses and are heated to the same temperature, the one with the lowest specific heat capacity will transfer heat the fastest to the wax, but the question implies they all melt through at the same time if the heat capacity is not the limiting factor or if the setup is idealized.

Multiple choice physics transfer of heat heat and heat transfer heat energy transfer heat energy transfers fundamentals of heat transfer conduction

Name a metal among the following having highest heat conductivity .

  1. Silver

  2. Copper

  3. Aluminium

  4. Brass
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Following are the thermal conductivities of the following metals and alloys: ( in $wK/m$ )
$Silver-430 \\ Copper-400 \\ Aluminium-235 \\ Brass-109$
Order of thermal (heat) conductivity:
$Silver \gt Copper \gt Aluminium \gt Brass$
So, Silver has highest thermal conductivity
Multiple choice physics transfer of heat heat and heat transfer heat energy transfer heat energy transfers fundamentals of heat transfer conduction

In general, metals have very low :

  1. Boiling Point

  2. Freezing Point

  3. Melting Point

  4. Specific Heat Capacity
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In conduction, heat is transferred by the vibrations of molecules. The density of conductors is large, it means molecules are close to each other, because of that they can easily transfer the heat quickly through the whole conductor, therefore unit mass of conductors require small heat to raise their temperature through $1^{o}$ i.e. conductors have very low specific heat. 

Multiple choice physics transfer of heat heat and heat transfer heat energy transfer heat energy transfers fundamentals of heat transfer conduction

Which metal is a good conductor of heat?

  1. Gold

  2. Mercury

  3. Lead

  4. Alloys
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
As metals contain free electrons, it transfers the energy given in the form of heat rapidly but in non-metals, it takes time to heat. Gold is metal so it is a good conductor of heat and mercury, lead, alloys are non-metals so they are poor conductors of heat.


Multiple choice evs - ii historic period ancient civilizations in river valleys cultural heritage of india: sculpture and architecture sculpture and architecture ancient civilisations of the world egyptian, mesopotamian, and chinese civilization other ancient civilizations of the world

Which of the following metals was not known to the Indus valley people?

  1. gold

  2. silver

  3. copper

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

The Indus Valley Civilization was a Bronze Age society. Iron was not introduced to the Indian subcontinent until the later Vedic period.

Multiple choice chemistry chemistry of non-metals oxides of elements simple oxides oxygen

The metals which can produce amphoteric oxides are:

  1. sodium and aluminium

  2. zinc and potassium

  3. calcium and sodium

  4. aluminium and zinc
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

'$Al$' and '$Zn$' reacts with both acids and bases. So, these are amphoteric in nature. So, oxides of these elements are amphoteric oxides. 

Multiple choice chemistry metals and non metals introduction to non-metals occurence of metals occurrence of metals and non metals

The most abundant metal in the earth's crust is :

  1. Oxygen

  2. Aluminium

  3. Calcium

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

Percent abundance of given elements in the earth's crust are :


Oxygen - 46.6%
Aluminium - 8.1%
calcium-3.63%
gold-0.0011%

But oxygen is a non-metal and aluminium, calcium and gold are metals. 

Therefore, Aluminium is the most abundant metal in the earth's crust.

Therefore, option B is correct.

Multiple choice chemistry metals and non metals introduction to non-metals occurence of metals occurrence of metals and non metals

The second most abundant metal present in the crust of the earth is :

  1. $Ca$
  2. $Al$
  3. $Cu$
  4. $Fe$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Iron is the second most abundant metal in the earths crust. It is found in the molten form inside the crust of the earth. In the presence of air and moisture it forms its oxide but the alloy of steel is widely used as pipes,it is unreactive in nature.

Multiple choice chemistry nuclear physics nuclear reactor the nuclear power station isotopes and nuclear chemistry

Which of the following is a neutron absorber?

  1. $Pb$
  2. $Ag$
  3. $Cd$
  4. $Cu$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
The purpose of neutron absorber is to have a controlled reaction.
The most important neutron absorber is 10B as 10B4C in control rods, or boric acid as a coolant water additive in PWRs. Other important neutron absorbers that are used in nuclear reactors are xenon, cadmium, hafnium, gadolinium, cobalt etc.