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 measurement and effects of heat heat exchange calorimeter measuring thermal quantities by the method of mixtures

Calorimeters are generally made of

  1. copper

  2. brass

  3. aluminium

  4. zinc
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Calorimeters is made of copper because:
1) Copper has low specific heat capacity and thus it reaches equilibrium temperature quickly by absorbing small amount of heat.

2) Cu is highly malleable and hence very thin box of small mass can be made, thus decreasing heat capacity of box.

3) Cu is good conductor of heat.
Multiple choice chemistry metals reaction of metals reactions of metals chemical properties of metals

The amphoteric metallic oxide is:

  1. calcium oxide

  2. barium oxide

  3. zinc oxide

  4. copper (II) oxide
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

 An amphoteric oxide is an oxide that can act as either an acid or base in a reaction.
$Al _2O _3$ is an amphoteric oxide. When reacted with HCl, it acts as a base to form the salt $AlCl _3$. When reacted with NaOH, it acts as an acid to form $NaAlO _2$.
also, zinc oxide is an amphoteric oxide.

Multiple choice chemistry metals reaction of metals reactions of metals chemical properties of metals

Oxides of which of the following metals is reduced by aluminium powder?

  1. Magnesium

  2. Potassium

  3. Chromium

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

All metal oxides loses oxygen and are therefore reduced. Metals always occur in their oxidized state in ores. In order to convert an ore to its elemental state, it is reduced.

Multiple choice chemistry metals reaction of metals reactions of metals chemical properties of metals

The metal that reacts with cold water is :

  1. mercury

  2. sodium

  3. zinc

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

Sodium is highly reactive with cold water forming hydroxides and hydrogen gas. Hence, sodium is always stored under kerosene. Mercury, zinc and tungsten are found in the reactivity series at the bottom and are not highly reactive compared to sodium.

Multiple choice chemistry metals reaction of metals reactions of metals chemical properties of metals

Among the metals, the one that cannot be obtained by the reduction of its metal oxide.

  1. $Cr$
  2. $Fe$
  3. $Mn$
  4. $Mg$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Actually the oxides of metals like Zn,Pb and other metals which are not very reactive can be reduced by Carbon. However oxides of very reactive metals (eg Aluminium,Chromium) can't be reduced by Carbon . Since they are very reactive they react with carbon to form their carbides hence are not effective in reduction.

Multiple choice chemistry metals reaction of metals reactions of metals chemical properties of metals

Metals such as lead, copper, silver and gold do not react with water at all.

  1. Statement is False

  2. Statement is True

  3. Lead reacts but copper, silver, and gold do not

  4. Copper reacts but lead, silver and gold do not.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Lead, copper, silver, and gold are low in the reactivity series. They do not react with cold or hot water, nor with steam, unlike highly reactive metals like sodium or potassium.

Multiple choice chemistry metals reaction of metals reactions of metals chemical properties of metals

 Name a metal which reacts with steam?

  1. Sodium

  2. Potassium

  3. Lithium

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

Metals from magnesium to iron in the activity series of metals, react with steam (but not $H _2O$) to form the metal oxide and hydrogen gas.

$\text{Magnesium + steam} \to \text{Magnesium oxide + Hydrogen}$
$Mg + H _2O \to MgO + H _2\uparrow$