Physical Properties of Metals

Q.

The metal used for making filaments of an electric bulb is _______.

Q.

Metals can be drawn into long wires by the property called _______.

1. Ductility

2. Malleability

3. Sonority

4. Conductivity

Q. Pure substances can be classified into elements and compounds.

1. True
2. False

Q.

Gold can be beaten into thin sheets because of its property of _______.

1. Ductility

2. Malleability

3. Sonority

4. Resistivity

Q.

1. True
2. False

Q.

Which of the following is the poorest conductor of heat?

1. Lead

2. Gold

3. Platinum

4. Silver

Q.

Give two uses of Platinum.

Q. Arrange the metals in the decreasing order of their reactivity with water.

1. Sodium
2. Magnesium
3. Calcium
4. Iron
5. Silver

Q. Question 2
The ability of metals to be drawn into thin wire is known as
(a) ductility
(b) malleability
(c) sonorousity
(d) conductivity

Q.

What type of filament is used in electric bulb?

Q.

Which periodic property enables the use of tungsten as a filament in a light bulb?

Q.

4.Which of the following element is a metalloid?

1. Sodium

2. Sulfur

3. Silicon

4. Silver

Q. The property of metals by virtue of which, they produce sound when struck is called :

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

Q. Explain the following with proper reasoning.
Radioactive materials are shielded by lead blocks.

Q.

Tungsten is used in incandescent bulbs because of its _________.

1. High melting point

2. Good lustre

3. High boiling point

4. High malleability.

Q. One of the most common solvent used for crystallisation is

1. Water
2. Alcohol
3. Normal saline
4. Sulphuric acid

Q. We use copper wire instead of silver for electrical applications because:

1. copper is more ductile than silver
2. copper is cheaper than silver
3. of more availability of copper than silver
4. all of these

Q. Non-metals are poor conductors of electricity.

1. True
2. False

Q. What do you understand by the term metal?

Q.

Substance	Property
1 . Potassium bromide 2 . Gold	a . Combustible b . Soluble in water
3 . Sulphur 4 . Neon	c . No chemicalreaction d . High ductility