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 the periodic table mendeleef's periodic table mendeleev's periodic law and its limitations mendeleev's periodic table development of the modern periodic table into the history

Eka-aluminum and Eka-silicon are known as:

  1. gallium and germanium

  2. aluminium and silicon

  3. iron and sulphur

  4. sodium and silicon
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Answer A

According to Mendeleev he named eka aluminium presently known as Gallium
and eka silicon presently known as Germanium.

Multiple choice evs look, learn and experience matter: states, classification and properties study of matter general introduction: importance and scope of chemistry

Which among the following is associated with iron sulphide ?

  1. Element

  2. Mixture

  3. Compound

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

Iron(II) sulfide or ferrous sulfide is a chemical compound with the formula $FeS$. Iron sulfides are often non-stoichiometric. powdered iron sulfide is pyrophoric (ignites spontaneously in air).

Multiple choice evs look, learn and experience matter: states, classification and properties study of matter general introduction: importance and scope of chemistry

Antimony and Arsenic belong to the category of:

  1. metals

  2. metalloids

  3. non-metals

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

Antimony and Arsenic belong to the category of metalloids. A $metalloid$ is any chemical element which has properties in between those of metals and nonmetals, or that has a mixture of them.

Multiple choice evs look, learn and experience matter: states, classification and properties study of matter general introduction: importance and scope of chemistry

Which one of the following element forms interstitial compounds?

  1. $Fe$
  2. $Co$
  3. $Ni$
  4. $Sc$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Interstitial compounds are formed when small atoms like H, C, or N are trapped inside the crystal lattice of transition metals. While many transition metals form these, Nickel is a classic example of a metal that forms such compounds.

Multiple choice chemistry chemical changes applications of electrolysis electroplating extraction of metals by electrolysis

 Which electrolyte is selected for the electroplating of metal article with silver?

  1. Argentocyanide

  2. Silver nitrate

  3. Silver chloride

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

Sodium argentocyanide (Na[Ag(CN)2]) is used as the electrolyte for silver plating because it provides a very low concentration of Ag+ ions, which ensures a smooth and uniform deposit.

Multiple choice chemistry chemical changes applications of electrolysis electroplating extraction of metals by electrolysis

Which is correct about silver plating?

  1. Anode - pure $Ag$

  2. Cathode - object to be electroplated
  3. Electrolyte - $Na[Ag(CN) _{2}]$

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
In silver plating, the object to be plated (e.g., a spoon) is made from the cathode of an electrolytic cell. 

The anode is a bar of silver metal, and the electrolyte (the liquid in between the electrodes) is a solution of silver cyanide, $AgCN$, in water.

When a direct current is passed through the cell, positive silver ions ($Ag^+$) from the silver cyanide migrate to the negative anode (the spoon), where they are neutralized by electrons and stick to the spoon as silver metal.

Hence, option D is correct.
Multiple choice physics electric current and its effects electric fuse electrical fuse and mcb fuse

Which is / are the material used for making the fuse wire. 

  1. Copper

  2. Glass

  3. Silver

  4. Silicon
Reveal answer Fill a bubble to check yourself
A,C Correct answer
Explanation

A fuse consists of a metal strip or wire fuse element, of small cross-section compared to the circuit conductors, mounted between a pair of electrical terminals, and (usually) enclosed by a non-combustible housing. The fuse is arranged in series to carry all the current passing through the protected circuit. The resistance of the element generates heat due to the current flow. The size and construction of the element is (empirically) determined so that the heat produced for a normal current does not cause the element to attain a high temperature. If too high a current flows, the element rises to a higher temperature and either directly melts, or else melts a soldered joint within the fuse, opening the circuit.
The fuse element is made of zinc, copper, silver, aluminum, or alloys of tin and lead to provide stable and predictable characteristics. The fuse ideally would carry its rated current indefinitely, and melt quickly on a small excess. The element must not be damaged by minor harmless surges of current, and must not oxidize or change its behavior after possibly years of service.

Hence correct option is option A and C 

Multiple choice physics electric current and its effects electric fuse electrical fuse and mcb fuse

Fuse wire is a

  1. tin-lead alloy

  2. copper-lead alloy

  3. tin-copper alloy

  4. silver-lead alloy
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Fuse wire is made of a tin-lead alloy and not copper because of the following reasons:

1. They have high resistance due to high resistance the wire heats up quickly, when large current flows.

Heating power of wire $P=i^2R$

2. They have low melting point which melts and breaks off the circuit if the current is larger than the safety limit.



In Fuse wire a copper wire can not be used because it has a high melting point. Copper wire will not melt easily when a high electric current passes through it and may harm the electrical appliances attached to it.

Multiple choice physics electric current and its effects electric fuse electrical fuse and mcb fuse

Fuse wire is made up of

  1. Alloy

  2. Mixture

  3. Metals

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

Fuse is generally made up of  an alloy of tin and lead. It is used in series with an appliance to prevent it from damage when excessive flows through the appliance. Material to be used in fuse wire must have Low melting point, low boiling point and high electric resistance.

Multiple choice physics electric current and its effects electric fuse electrical fuse and mcb fuse

Which wire could be used as a fuse wire?

  1. Nichrome wire

  2. Zinc

  3. Copper

  4. Silver
Reveal answer Fill a bubble to check yourself
B,C,D Correct answer
Explanation

The fuse element is made of zinc, copper, silver, aluminum, or alloys to provide stable and predictable characteristics. The fuse ideally would carry its rated current indefinitely, and melt quickly on a small excess.