Tag: physical properties of metals and non-metals

Questions Related to physical properties of metals and non-metals

Which characteristics are required for a element to behave as electrical conductor?

chemistry metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

  1. It should have valence electron

  2. It should have free electron

  3. It easily provide electron to other element

  4. Both $B$ and $C$

Show answer
Correct Option: D
Explanation:

Electrical conductors elements have free electrons, which they can easily provide to conduct electricity. This characteristics are generally available in metals.

Which allotrope of carbon do not conduct electricity?

chemistry metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

  1. Graphite

  2. Diamond

  3. Fullerene

  4. Both b and c

Show answer
Correct Option: D
Explanation:

Carbon is a non-metal which have allotropic form that is graphite, diamond and fullerene. Out of this three only graphite is conductor of electricity. Diamond and fullerene do not conduct electricity.

Non-metals are brittle while metals are ductile. Why?

chemistry metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

  1. Because of lesser extent of bonding in non-metals

  2. Because of greater extent of bonding in non-metals

  3. Because of smaller size of non-metallic atoms

  4. Because of lower conductivity of non-metals

Show answer
Correct Option: A
Explanation:

The basic difference between metals and non-metals is the extent of bonding.Metals have very high extent of bonding than that in non-metals which makes the metal malleable. and non-metals brittle.

Which of the following elements cannot be beaten into thin wires?

chemistry metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

  1. $O$

  2. $P$

  3. $S$

  4. All of these

Show answer
Correct Option: D
Explanation:

Non-metals are generally non-ductile and cannot be beaten into thin wires. All given elements $O,P,S$ are non metals and do not have property of ductility. 

One metal which is not ductile at room temperature is:

chemistry metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

  1. $Cu$

  2. $Sn$

  3. $Pb$

  4. $Hg$

Show answer
Correct Option: D
Explanation:

$Hg$ is liquid at room temperature and cannot be beaten into thin wire; thus is not ductile at room temperature. All other metals $Cu, Sn ,  Pb$ are ductile at room temperature. 

Which among the following non-metal is liquid at room temperature?

chemistry composition of matter physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

  1. Chlorine

  2. Bromine

  3. Mercury

  4. Phosphorous

Show answer
Correct Option: B
Explanation:

Mercury and bromine both are present in liquid state at room temperature but mercury is metal and bromine is non-metal.

So, liquid non-metal at room temperature is bromine.

Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured. The non-metal which is known to form the largest number of compounds is:
chemistry composition of matter physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

  1. carbon

  2. sulphur

  3. nitrogen

  4. chlorine

Show answer
Correct Option: A
Explanation:
Carbon is a non-metal and is  known to form the largest number of compounds due to two reasons:

  1. Catenation - The ability of carbon to form bonds with the atoms of itself resulting in the large chains and rings of carbon. It causes large no. of chain and ring compounds.
  2. Tetravalency - Due to tetravalency, carbon can form bonds with other tetravalent elements and monovalent elements like hydrogen, chlorine, bromine etc.

Hence, option A is correct.

Which of the following element is not in the liquid state at room temperature?

chemistry metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

  1. $Hg$

  2. $Li$

  3. $Ga$

  4. $Br$

Show answer
Correct Option: B
Explanation:
Bromine and mercury are metal which is liquid at room temperature. Gallium a brittle solid at low temperatures, and a liquid at temperatures greater than $29.76^o C$ (slightly above room temperature).Thus gallium is liquid at room temperature.
Bromine is a liquid because electrons are well apart from the nuclei so they are easily distorted .Intermediate intermolecular forces exists and thus it is in liquid state.
 Lithium  is a solid at room temperature.

Sulphur extracted from natural sources is called roll sulfur.

chemistry metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

Sulphur extracted from natural sources is called brimstone. 

B is correct

The metallic character of elements ............. in a group from top to bottom.

chemistry materials: metals and non-metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

  1. Increases

  2. Decreases

  3. remains constant

  4. shows indefinite behaviour

Show answer
Correct Option: A