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Materials Metals and Non Metals

An example of a non-metal is

a) Copper.
b) Zinc.
c) Iron.
d) Chlorine.

✔Answer

✔Solution

Correct Answer Is : Chlorine.

Solution Is : Chlorine is a non-lustrous, non-malleable and non-ductile material. It gains electrons to attain the stable electronic configuration.

An example of a metal is

a) Sodium.
b) Oxygen.
c) Flourine.
d) Phosphorus.

✔Answer

✔Solution

Correct Answer Is : Sodium.

Solution Is : Sodium is a metal because it looses the electron. Oxygen and flourine are halogens, while phosphorus is a non-metal.

The best conductor of electricity is

a) Silver.
b) Iron.
c) Aluminum.
d) Copper.

✔Answer

✔Solution

Correct Answer Is : Silver.

Solution Is : Metals are always good conductors of electricity. Silver is a metal. It conducts electricity and has less resistance.

The one that is a good conductor of heat and electricity is

a) A metal.
b) A non-metal.
c) A metalloid.
d) Gas.

✔Answer

✔Solution

Correct Answer Is : A metal.

Solution Is : Most metals are considered as good conductors of electricity. They have a high melting point and low resistance.

The metal that can be easily cut with a knife is

a) Iron.
b) Aluminum.
c) Sodium.
d) Zinc.

✔Answer

✔Solution

Correct Answer Is : Sodium.

Solution Is : Sodium is an alkali, which is silvery white, soft and is a highly reactive metal. It has only one stable isotope.

The following that shows the correct meaning for malleablility of metals is

a) They are sonorous.
b) They can be drawn into sheets.
c) They can be drawn into wires.
d) They are good conductors of heat.

✔Answer

✔Solution

Correct Answer Is : They can be drawn into sheets.

Solution Is : Metals are malleable which means they have a property to be drawn into sheets.The property of metal by which it can be drawn into wires is called ductility. Since metals produce ringing sounds, they are said to be sonorous.

The following that shows the correct meaningfor ductility of metals is

a) They can be drawn into wires.
b) They can be drawn into sheets.
c) They are shiny.
d) They are good conductors of electricity.

✔Answer

✔Solution

Correct Answer Is : They can be drawn into wires.

Solution Is : Metals are ductile which means they can be drawn into wires.The property of metals by which they can be beaten into thin sheets is called malleability. Since metals produce ringing sounds, they are said to be sonorous.

Non-metal used in purification of water is

a) Nitrogen.
b) Oxygen.
c) Sulphur.
d) Chlorine.

✔Answer

✔Solution

Correct Answer Is : Chlorine.

Solution Is : Chlorine is recognized as a valuable chemical for removing the contamination in water.

The metal that is widely used in making jewellery is

a) Iron.
b) Zinc.
c) Gold.
d) Copper.

✔Answer

✔Solution

Correct Answer Is : Gold.

Solution Is : Gold is a dense soft shiny metal. It is used to make precious jewellery. It is ductile, malleable and lustrous.

When zinc reacts with copper sulphate, zinc sulphate is formed. It is an example of

a) Decomposition reaction. .
b) Combination reaction.
c) Displacement reaction.
d) Substitution reaction

✔Answer

✔Solution

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Materials Metals and Non Metals

An example of a non-metal is

Correct Answer Is : Chlorine.

Solution Is : Chlorine is a non-lustrous, non-malleable and non-ductile material. It gains electrons to attain the stable electronic configuration.

An example of a metal is

Correct Answer Is : Sodium.

Solution Is : Sodium is a metal because it looses the electron. Oxygen and flourine are halogens, while phosphorus is a non-metal.

The best conductor of electricity is

Correct Answer Is : Silver.

Solution Is : Metals are always good conductors of electricity. Silver is a metal. It conducts electricity and has less resistance.

The one that is a good conductor of heat and electricity is

Correct Answer Is : A metal.

Solution Is : Most metals are considered as good conductors of electricity. They have a high melting point and low resistance.

The metal that can be easily cut with a knife is

Correct Answer Is : Sodium.

Solution Is : Sodium is an alkali, which is silvery white, soft and is a highly reactive metal. It has only one stable isotope.

The following that shows the correct meaning for malleablility of metals is

Correct Answer Is : They can be drawn into sheets.

Solution Is : Metals are malleable which means they have a property to be drawn into sheets.The property of metal by which it can be drawn into wires is called ductility. Since metals produce ringing sounds, they are said to be sonorous.

The following that shows the correct meaningfor ductility of metals is

Correct Answer Is : They can be drawn into wires.

Solution Is : Metals are ductile which means they can be drawn into wires.The property of metals by which they can be beaten into thin sheets is called malleability. Since metals produce ringing sounds, they are said to be sonorous.

Non-metal used in purification of water is

Correct Answer Is : Chlorine.

Solution Is : Chlorine is recognized as a valuable chemical for removing the contamination in water.

The metal that is widely used in making jewellery is

Correct Answer Is : Gold.

Solution Is : Gold is a dense soft shiny metal. It is used to make precious jewellery. It is ductile, malleable and lustrous.

When zinc reacts with copper sulphate, zinc sulphate is formed. It is an example of

Correct Answer Is : Displacement reaction.

Solution Is : More reactive metal (zinc) displaces less reactive metal (copper) from their compounds.

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