Tag: physical properties of metals and non-metals

Questions Related to physical properties of metals and non-metals

Which of the following has lowest density?

chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

  1. Oxygen

  2. Hydrogen

  3. Neon

  4. Carbon

Show answer
Correct Option: B
Explanation:

Hydrogen

Among all non-metals. Hydrogen has less density even its density is lesser than air.

Metals have:

chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

  1. high density

  2. low density

  3. moderate density

  4. none of above

Show answer
Correct Option: A
Explanation:

Metals have a high density hence they feel heavy for their size whereas non-metals have a low density.

Density is:

chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

  1. mass per time

  2. mass per weight

  3. mass per volume

  4. mass per atomic weight

Show answer
Correct Option: C
Explanation:

The density, or more precisely, the volumetric mass density, of a substance is its mass per unit volume. The symbol most often used for density is $\rho$.

Which of the following statement is correct?

chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

  1. All metals are ductile.

  2. All non-metals are ductile.

  3. Generally, metals are ductile.

  4. Some non-metals are ductile.

Show answer
Correct Option: C
Explanation:

Metals are generally malleable — that is, they can be hammered or pressed permanently out of shape without breaking or cracking — as well as fusible (able to be fused or melted) and ductile (able to be drawn out into a thin wire). 


Typically they are malleable and ductile, deforming under stress without cleaving. There are metals which are not ductile. 
For example sodium and mercury.

The high density of most of the metals is due to the_________.

chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

  1. loosely packed crystal lattice of the metallic structure

  2. weak metallic bonding

  3. tightly packed crystal lattice of the metallic structure

  4. strong ionic bonding

Show answer
Correct Option: C
Explanation:

The high density of most metals is due to the tightly packed crystal lattice of the metallic structure.

The alkali and alkaline earth metals in groups $I :A$ and $II :A$ are referred to as the light metals because, they have:

chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

  1. low density.

  2. low hardness.

  3. low melting points.

  4. all of the above.

Show answer
Correct Option: D
Explanation:

 The alkali and alkaline earth metals in groups $I :A$ and $II :A$ are referred to as the light metals because they have low density, low hardness, and low melting points.

Which of the following element is sonorous?

chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

  1. Hydrogen

  2. Sulphur

  3. Iron

  4. All of above

Show answer
Correct Option: C
Explanation:

Sonorous, i.e., making a sound when it is a property of the metal. Iron being a metal is sonorous whereas hydrogen and sulphur are non-metals.


So, the correct option is $C$

The most durable metal plating on iron to protect against corrosion is :

chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

  1. Tin plating

  2. Zinc plating

  3. Copper plating

  4. Nickel plating

Show answer
Correct Option: B
Explanation:

Galvanisation is the process of applying a protective zinc coating to iron or steel, to prevent rusting. The most common method is hot dip galvanizing, in which steel sections are submerged in a bath of molten zinc. Hence, zinc plating is the most durable metal plating on iron to protect against corrosion.

Based on the information in each choice below, which of the noble gases would have the greatest density for a $1.00\ L$ sample at room temperature and pressure?

chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

  1. Krypton molar mass $83.8 g/mol$, atomic radius $111$ picometers

  2. Argon molar mass $39.9 g/mol$, atomic radius $94$ picometers

  3. Neon molar mass $20.2 g/mol$, atomic radius $70$ picometers

  4. Helium molar mass $4.0 g/mol$, atomic radius $50$ picometers

Show answer
Correct Option: A
Explanation:

Ans : A Krypton molar mass $83.3\ g/ mol$, atomic radius III picometers.

Note: [ As we go top to bottom, Atomic mass increases. This is because the $e^{\ominus}$ in bigger noble gases are located away from the nucleus and held less tightly by the atom. Therefore the density of krypton is more then $He, Ne$ and $Ar$].

Which of the following is the densest metal on earth?

chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

  1. Rhenium

  2. Osmium

  3. Rhodium

  4. Iridium

Show answer
Correct Option: B
Explanation:

The densest chemical element is osmium(which is a metal). Osmium has a density of around 22 grams per cubic centimeter, about twice the density of lead.