Tag: physical properties of non-metals

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

Which of the following are properties of non-metals?

  1. Lustre

  2. Can form alloys

  3. Amorphous

  4. Non-conductive towards electricity
Reveal answer Fill a bubble to check yourself
C,D Correct answer
Explanation

The properties of non-metals are:

  1. They are amorphous in nature.
  2. They are not malleable and ductile.
  3. They are poor conductors of heat and electricity.
  4. They do not form alloys.

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

Compare metals and non-metals with particular emphasis on solubility:

  1. Both dissolve in solvent

  2. None of them dissolve in solvent

  3. Metal dissolve while non-metal do not dissolve in solvent

  4. Non-metal dissolve while metal do not dissolve in solvent
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
MetalsThey do not dissolve in solvents except by chemical action. Non-metalsThey dissolve in solvents and can be re-obtained by evaporation. Example: sulphur in carbon disulphide.
Multiple choice chemistry composition of matter physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

The non-metallic mineral among the following is :

  1. graphite

  2. chromite

  3. bauxite

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

Chromite is an ore of chromium, bauxite is an ore of aluminium and tungston are metallic in nature while graphite is an allotrope of carbon and a carbonaceous compound. It is a very soft allotrope of carbon while other allotrope of carbon diamond is the hardest known element on this earth. This is because of the chemical structure of graphite which shows slippery nature of layers of carbon and presence of loose electrons.

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

Which non-metal has a shining surface?

  1. Graphite

  2. Phosphorous

  3. Sulphur

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Graphite is the most stable form of carbon and so it is used as the standard state for defining the heat and formation of carbon compounds. It has a layered planar structure and the bonding between the layers is vander waals bonds. It is a non metal with shining surface.

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

Which non-metal has semi-conductor property?

  1. Boron

  2. Carbon

  3. Silicon

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

Silicon is a tetravalent metalloid. Pure silicon is used to produce silicon wafers in the semiconductor industry. Pure silicon is an intrinsic semiconductor as it conducts electron holes and increases electrical conductivity. Silicon is doped with other microelements to increas its conductivity. It is used in transistors, solar cells, semiconductor devices.