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 d and f block elements solid solutions formation of complex compounds and constituent of catalysts general characteristics of first transition series

Which of the following metals are present in Devarda alloy?

  1. $Cu$
  2. $Al$
  3. $Zn$
  4. $Ag$
Reveal answer Fill a bubble to check yourself
A,B,C Correct answer
Explanation

Devarda's alloy is  an alloy of aluminium (44% – 46%), copper (49% – 51%) and zinc (4% – 6%).

Devarda's alloy is used as reducing agent in analytical chemistry for the determination of nitrates after their reduction to ammonia under alkaline conditions.

Hence option A,B and C are correct.

Multiple choice chemistry study of the first element - hydrogen occurrence of hydrogen introduction to hydrogen hydrogen

Metals like .......... , ........... and .......... give $H _2$ with steam.

  1. iron

  2. magnesium

  3. aluminium

  4. sodium

  5. calcium

  6. none of the above
Reveal answer Fill a bubble to check yourself
A,B,C Correct answer
Explanation

Metals which react with steam to give $H _2$ gas are Iron, Magnesium and Aluminium.


Magnesium ribbon reacts with steam to give Magnesium oxide and Hydrogen gas.

$Mg$ $+$ $H _2O$ $=$ $MgO$ $+$ $H _2$

Aluminium reacts with steam to give Aluminium Oxide and Hydrogen gas. But the reaction takes place very slowly, as a layer of Aluminium Oxide forms on the metal.

$2Al$ $+$ $3H _2O$ $=$ $Al _2O _3$ $+$ $3H _2$
Iron does not react with cold water. It reacts with steam to form Ferric Oxide and hydrogen gas.

$3Fe$ $+$ $4H _2O$ $=$ $Fe _3O _4$ $+$ $4H _2$
Thus, options A, B  and C are correct.

Multiple choice chemistry nature of things objects around us different types of materials materials around us and importance of grouping

Electric wires, coils, and machines are made of metals. Which of the following metal cannot be used for them?

  1. copper

  2. silver

  3. iron

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

Electric wires, coils and machines are made of hard metals. Sodium is a very soft metal which can be cut through knife hence it cannot use to prepare electric wires, coils and machines.

Multiple choice ionic bond atomic structure and chemical bonding chemistry

Pertaining to metallurgy, when "M" is a metal, its compound $MY _2$ is :

  1. Covalent

  2. Ionic

  3. Inorganic

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

Reaction:

$M-2e^- \rightarrow M^{2+}$

$2Y+2e^- \rightarrow 2Y^-$

$M^{2+} + 2Y^- \rightarrow MY _2$

So, this is an ionic compound.

Multiple choice physics magnetic effect of electric current magnetic field due to a circular current carrying conductor magnetic field produced in a circular loop field due to a current carrying coil magnetic field lines due to current magnetic field due to current carrying conductor magnetic field on the axis of a toroid

Which among the following is not an electronic component used in constructing a toroid?

  1. copper wires

  2. laminated iron

  3. ferrite core

  4. aluminium powder
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Toroids are inductors and transformers which use magnetic cores.
These cores are of ferromagnetic material such as
Laminated iron, iron powder or ferrite.
Multiple choice physics electric current through conductors study about cells electric cell types of cells

What is the $-$ve terminal of dry cell made up of?

  1. Carbon rod

  2. Zinc plate

  3. Magnesium plate

  4. Cadmium rod
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The dry cell consists of a zinc can, electrolyte paste, and a carbon rod in the center. A chemical reaction takes place between the zinc can and the paste. Electrons flow from the negative (zinc) terminal to the positive (carbon) terminal. Electrons are then pumped back to the negative terminal.
Multiple choice physics simple electric circuits bulbs bulb bulb connected to an electric cell

Which of the following things can be used as a filament of electric bulb?

  1. Tungstan

  2. Tin

  3. Lead

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

Tungsten metal is selected for making filaments of lamp bulbs because tungsten can sustain high temperatures and it has high melting point, combined with the fact that it also has high resistivity. They do not oxidize easily at high temperatures.