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 evs reflection of light by plane surfaces characteristics of an image formed by a plane mirror formation of image in a plane mirror characteristics of the image formed by a plane mirror

The silvering on the back surface of a mirror can be done by:

  1. Silver

  2. Mercury

  3. both

  4. none
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A plane mirror is made from a few mm thick glass plate. One surface of glass plate is polished to a high degree of smoothness. This forms the front part of the mirror. And the other (back) surface is silvered (i.e painted with silver, mercury or some other material).

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 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

Which of the following is the correct match?
(a) Eka silicon - $\text{Ge}$
(b) Eka aluminum - $\text{Ga}$
(c) Eka manganese - $\text{Tc}$
(d) Eka boron - $\text{Sc}$

  1. b, c

  2. a, b, d

  3. a, d

  4. All of above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Eka is a-prefix used to designate the first element of the same family in the periodic table beyond the one to whose name it is prefixed, as Eka manganese

(a) Eka silicon - Ge (germanium)

(b) Eka aluminium - Ga (gallium )

(c) Eka manganese - Tc (technetium) 

(d) Eka boron – Sc (scandium)

Hence, the correct option is $\text{D}$
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

The elements which have taken the place of Eka aluminium is :

  1. Germanium

  2. Gallium

  3. Silicon

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

Eka-silicon means germanium. It occurred because of silicon whereas eka-aluminium occurred because of aluminium and later named it as gallium. 


While filling the elements considering atomic number would be main and fundamental property there were gaps in the mentioned groups hence he filled them with these names.

Hence the correct option is B.