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 solar equipment production of electricity from solar energy solar power alternate sources of energy solar power plant solar energy and its applications renewable and non-renewable resources renewable and non-renewable sources of energy generation of electricity

Which of the following metals is used as connecting wires that connect solar cells in a solar panel?

  1. Copper

  2. Iron

  3. Aluminium

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

Silver is the metal which is used for connecting wires that connect solar cells in a solar panel, due to its large conductivity.

Multiple choice chemistry general principles of metallurgy extraction of copper and zinc extraction of copper and zinc from their oxides basics of metallurgy

Choose the odd one out :

  1. Steel

  2. Copper

  3. Bronze

  4. Brass
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Copper is pure metal.

But steel, bronze and brass are metal alloy.

Steel is an alloy of iron and carbon, and sometimes other elements.

Brass is an alloy of copper and zinc. 

Bronze is a metal alloy consisting primarily of copper, usually with tin as the main additive, but sometimes with other elements such as phosphorus, manganese, aluminium, or silicon.

Hence, option B is correct.

Multiple choice chemistry general principles of metallurgy extraction of copper and zinc extraction of copper and zinc from their oxides basics of metallurgy

Anode mud obtained after electrolytic refining of copper contains:

  1. $Ag$
  2. $Au$
  3. $Pt$

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Electrorefining:
Anode: Impure copper or crude copper
Cathode: Pure copper
Electrolyte: 15% $CuSO _4$ Solution + 5% $H _2SO _4$

When electric current is passed through the electrolyte, the anode gradually dissolves and pure copper is deposited on the cathode which gradually grows in size. Impurities like. Fe, Zn, Ni etc, dissolve in the solution as sulphates while gold, silver, platinum settle down below the anode as anode mud.
Multiple choice chemistry production of metals refining of metals basics of metallurgy basic metallurgical processes

Which of the following metal refined-electrolytically?

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

The impure copper from a smelter is cast into a block to form the positive anode and the cathode is made up of purified copper. These are dipped into an electrolyte of copper sulphate solution. purification of aluminium can be carried out by the Hoopes process. This is an electrolytic process.

Multiple choice chemistry production of metals refining of metals basics of metallurgy basic metallurgical processes

Which of the following metals is not refined by electrolytic refining?

  1. $Na$
  2. $Au$
  3. $Cu$
  4. $Al$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The sodium and chloride produced in the electrolysis are kept from coming in contact with each other as the sodium is highly reactive and it must be prevented from coming in contact with oxygen as the metal quickly oxidizes under high temperature conditions.

Multiple choice chemistry production of metals refining of metals basics of metallurgy basic metallurgical processes

The metal refined-electolytically is:

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

Copper and zinc will be refined in electrolytic refining process for the following reasons.

$\rightarrow$ It meets the cost of refining 
$\rightarrow$ In more cases, electrolyte is selected which is the sulphate of the metal that is going to be refined. 

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 equilibrium and acids-bases dissociation constants ionisation of weak acids and weak bases ionization constants of weak acids and weak bases

A solution contains both $Mg^{2+}$(aq) and $Sr^{2+}$(aq) at the same concentration.
The solution is divided into two equal portions. Aqueous sodium hydroxide is added dropwise to one portion. Dilute sulfuric acid is added dropwise to the other portion.
Which row is correct?

precipitate seen first when NaOH(aq) is added precipitate seen first when $H _2SO _4$(aq) is added
A magnesium hydroxide magnesium sulfate
B magnesium hydroxide strontium sulfate
C strontium hydroxide magnesium sulfate
D strontium hydroxide strontium sulfate


  1. A

  2. B

  3. C

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

$\text{On reacting with NaOH(aq) the Mg+2 gives precipitation reaction.}$


$\text{Sr2+ forms strontium sulfate by reaction with sulphuric acid.}$

$\text{So option B is correct.}$

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.