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

Non-metals are poor conductors of heat, which are tend to:

  1. be brittle

  2. conduct an electrical current

  3. have a shiny luster

  4. be malleable

  5. lose electrons
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Non metals tend to gain or share electrons when they react with other substances. 
They are poor conductors of heat and electricity. 
They are non-lustrous and have various colors. 
They are brittle and non-malleable hard or soft. 
Multiple choice chemistry metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

______________ is the non-metal which conduct electricity.

  1. Carbon

  2. Nitrogen

  3. Oxygen

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

Carbon is the non-metal which conduct electricity in the form of graphite which is it's allotrope. Allotropes are the compound of the element in which they have same chemical properties but different physical properties. 

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

Non-metals do not show ductility due to absence of:

  1. metallic bonds which allow one electron to slip over another

  2. covalent bonds which gives strength

  3. ionic bonds which gives makes it hard

  4. co-ordinate bonds which which gives extra stability
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Non-metals do not show ductility due to absence of metallic bonds which allow one electron to slip over another. High degrees of ductility in metals occur due to metallic bonds. In metallic bonds valence shell electrons are delocalized and shared between many atoms. The delocalized electrons allow metal atoms to slide over one another without being subjected to strong repulsive forces that would cause non-metals to shatter.

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

Generally, non-metals are not lustrous. Which of the following non-metal is lustrous?

  1. Sulphur

  2. Oxygen

  3. Nitrogen

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

Lustre means shine. Shining metals are also called lustrous metal. For example, gold. Non-metals such as sulphur, oxygen, nitrogen are non-lustrous but iodine is a greyish black solid and crystals have a metallic lustre.

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

Non metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.

The allotropic form of a non-metal, which is a good conductor of electricity is: 

  1. Graphite

  2. Diamond

  3. Rhombic sulphur

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

Graphite, which is an allotrope of carbon, is a good conductor of electricity.

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

Boojho has learnt that non-metals on beating with a hammer are generally broken into pieces. Which of the following is a non-metal?

  1. Iron nail

  2. Aluminium wire

  3. Copper plate

  4. Piece of coal
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

All are metals in the given options iron, aluminium and copper but only carbon is a nonmetal present which is breakable with a hammer.

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

Non-metals have properties similar to that of metals.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Non-metals have properties similar to that of metals , This  Statement is false because:

Properties of metals : 

Metals are solid at room temp. 
They are generally hard and strong. 
They have metallic lustre. 
They have high melting and boiling points. 
They are good conductors of heat and eletricity. 
Metals are sonorous. 
Most metals have high tensile strength. 
They are malleable. 
They are ductile. 
They have high densities. 


Properties for non-metals: 

Non-metals are glasses or solids at room temp. except bromine. 
They are not as hard as metals and have low tensile strengths. 
They do not have lusture. 
They are bad conductors of heat and electricity. 
Non-metals are brittle, they are neither malleable nor ductile. 
They usually have low densities. 
They have low melting and boiling points. 
They are non-sonorous.