Physical Properties of Metals

Q.

A metal with low melting and boiling points is ________

1. B

2. I

3. F

4. K

Q. Metals have a property which helps them to get beaten into thin sheets. This is because of the ability of the atoms to roll over each other into new positions without breaking the metallic bond. The name of the property is_______.

1. Malleability
2. Ductility
3. Hardness
4. Toughness

Q. Which of the following metal is used to coat iron articles during galvanisation?

1. Lead
2. Mercury
3. Zinc
4. Copper

Q. (b) Give reason: Graphite is used to make a lead of the pencils.​

Q. Silver foil is used for wrapping food. Which property of silver is used for this?

1. Strength
2. Density
3. Malleability
4. Ductility

Q. Which among the following is the hardest substance?

1. Wood
2. Cheese
3. Iron
4. Plastic

Q. Give one example of each of the following.
(a) A non-metal which is lustrous
(b) A non-metal which is liquid at room temperature
(c) A metal which is soft
(d) A metal which is non-malleable

Q. (1)

In the boxes of Column I the letters of some words got jumbled.​

​Arrange them in proper form in the boxes given in Column II.

(2)

In the boxes of Column I the letters of some words got jumbled.​
Arrange them in proper form in the boxes given in Column II.

(3)

In the boxes of Column I the letters of some words got jumbled.​

Arrange them in proper form in the boxes given in Column II.

(4)

In the boxes of Column I the letters of some words got jumbled.​

Arrange them in proper form in the boxes given in Column II.

Q. (1)

In the boxes of Column I the letters of some words got jumbled.​

​Arrange them in proper form in the boxes given in Column II.

(2)

In the boxes of Column I the letters of some words got jumbled.​
Arrange them in proper form in the boxes given in Column II.

(3)

In the boxes of Column I the letters of some words got jumbled.​

Arrange them in proper form in the boxes given in Column II.

(4)

In the boxes of Column I the letters of some words got jumbled.​

Arrange them in proper form in the boxes given in Column II.

Q.

Question 10

Give reasons:

(i) Electric boards fitted on the wall made of plastic or wood.

(ii) The handle of the cooker is made of plastic.

Q. Which of the following substances can be classified as hard, strong, and unbreakable?

1. Earthen pot
2. Paper bag
3. Iron rod
4. Glass table

Q. Give three differences between metals and non-metals. ​

Q. Which of the following materials can probably reflect sunlight?

1. Paper
2. Cardboard
3. Plastic
4. Steel

Q. Which of the following is sonorous?

1. Metalloids

2. Non-Metals

3. Metals
4. None of these

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

1. $Li$
2. $Ga$
3. $Br$
4. $Hg$

Q. How do we classify materials based on their hardness? Explain.

Q. Question 8
Match the substances given in Column A with their uses given in Column B.
$\begin{array}{cccc}& A& & B\\ \left(i\right)& Gold& \left(a\right)& Thermometers\\ \left(ii\right)& Iron& \left(b\right)& Electricwire\\ \left(iii\right)& Aluminium& \left(c\right)& Wrappingfood\\ \left(iv\right)& Carbon& \left(d\right)& Jewellery\\ \left(v\right)& Copper& \left(e\right)& Machinery\\ \left(vi\right)& Mercury& \left(f\right)& Fuel\end{array}$

Q. Which of the following substances can be classified as hard, strong, and unbreakable?

1. Glass table
2. Iron rod
3. Paper bag
4. Earthen pot

Q.

You can make a copper wire but not a coal wire. It is because:

1. Copper is ductile but coal is not.

2. when coal is tried to turn into wire, it start burning.

3. Copper is malleable but coal is not.

4. Copper is sonorous but coal is not.

Q. How do we classify materials based on their hardness? Explain.

Q. Metals like gold can be drawn into wires due to its property of _______

Q. Given below is the table containing the properties of metals.

Which amongst the following properties can be X and Y?

1. X - Lustre; Y - Ductility.
2. X - Ductility; Y - Lustre.
3. X - Hardness; Y - Toughness.
4. X - Toughness; Y - Hardness.

Q.

What are adhesives?

Q. Which of the following is a metal?

1. Silver
2. Gold
3. Iron
4. All of the above

Q. The property by which metals can be beaten into sheets is known as ___

1. sonority
2. lusture
3. ductility
4. malleability

Q. A lustrous material has the ability to most of light.

1. absorb
2. reflect
3. pass

Q. Name the property by which the following objects appear shiny.

1. 
2. 
3. 
4. 

Q.

A substance is said to be sonorous if it _________.

1. produces a ringing sound when beaten

2. conducts heat

3. conducts water through metal pipes

4. conducts electricity

Q.

Which element is used in manufacturing cans, foils and kitchen utensils, pipes, and window frames?

1. Aluminium

2. Actinium

3. Gold

4. Silver

Q. Which among the following non metals is in liquid form?

1. Bromine
2. Phosphorus
3. Carbon
4. Hydrogen