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 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.

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

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

Name the following: A metal which does not react with cold water but reacts with steam.

  1. Magnesium

  2. Iron

  3. Zinc

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

Magnesium has almost no reaction with cold water. It reacts very slowly with hot water.  It reacts with steam when being heated and gives hydrogen gas and metal oxide.
Magnesium + Water $\rightarrow$  Magnesium hydroxide + Hydrogen gas
Zinc and iron do not react with cold or hot water.  They react with  steam slowly to give the respective oxides:
Zinc + Steam $\rightarrow$  Zinc oxide  + Hydrogen gas
Iron + Steam $\rightarrow$ Iron(II) iron(III) oxide  + Hydrogen gas

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

Metals combine with oxygen to produce:

  1. neutral acid

  2. basic oxide

  3. acidic acid

  4. amphoteric oxide
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
An oxide that combines with water to give an acid is termed as an acidic oxide. The oxide that gives a base in water is known as a basic oxide.
Generally Group 1 and Group 2 metals  form bases called base anhydrides or basic oxides e.g.,
$4K+O _2 \rightarrow 2K _2O$
Basic oxides are the oxides of metals. If soluble in water, they react with water to produce hydroxides (alkalies) e.g.,
$K _2O(s)+H _2O(l) \rightarrow 2KOH(aq)$)

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

Name one metal that will not react with cold water but will react with steam.

  1. Zinc

  2. Iron

  3. Calcium

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

Zinc is a metal which doesnot react with cold water but reacts with steam. The chemical equation for the reaction can be written as:
$ Zn + H _{2}O \rightarrow ZnO + H _{2}$
         (steam)

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

Which one of the following metals do not react with cold as well as hot water?

  1. Na

  2. Ca

  3. Mg

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

The metal sodium, calcium and magnesium are highly reactive to water and make their hydroxides. 
Iron is a less reactive metal and does not show any reaction while treated with cold as well as hot water but will react with steam and form metal oxides and hydrogen gas.
$3Fe(s) +4H _2O(g) \rightarrow Fe _3O _4(s)+4H _2(g)$
  Iron         Steam          Iron(III) oxide   Hydrogen

Multiple choice history the beginning of settled life life after stone ages ancient civilizations in river valleys historic period

Metals known to Indus Valley Civilization were:

  1. Gold, copper, silver, bronze but not iron

  2. Silver, iron, bronze but not gold

  3. Iron, copper, gold but not silver

  4. Zinc, silver, iron but not gold.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Gold, copper, silver, bronze metals were known to Indus Valley Civilization but not iron. The Indus valley people or Harappan people not discovered iron. The Indus Valley Civilization was a Bronze Age Civilization extending from what today is northeast Afghanistan to Pakistan and northwest India, it was one of three early Civilization of the Old World. Inhabitants of the ancients Indus river valley developed new techniques in handicraft (carnelian products, seal carving) and metallurgy (copper, bronze, lead, and tin).

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

A fuse wire is generally made of

  1. tin

  2. tin-lead alloy

  3. copper

  4. either (a) or (b) above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fuse wire are used to save the home appliances from damagaing by large currents. so they are made up of such materials which have high resistance and low melting point so that they can melt down when unexpected amount of current is passed through.for this work either tin metal or tin-lead alloy will be appropriate.