Tag: physical properties of metals and non-metals

Questions Related to physical properties of metals and non-metals

Out of sulphur and gold, which will be have higher melting point?

chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

  1. Sulphur

  2. Gold

  3. Both have equal melting point

  4. None of the above

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Correct Option: B

Melting of iron is _____ than sulphur.

chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

  1. higher

  2. lower

  3. equal

  4. none of the baove

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Correct Option: A
Explanation:

Melting point of metals will be higher than non-metal. So, iron will have higher melting point.

Mark the incorrect statement(s).
a) Most of the metals are soft.
b) All metals are equally hard.
c) Sodium is a soft non-metal.

chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

  1. a, b

  2. b, c

  3. a, c

  4. All of the above

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Correct Option: D
Explanation:

Most of the metals are hard. But all the metals are not equally hard. The hardness varies from metal to metal. Most of the metals like iron, copper etc. are very hard. Sodium, potassium are exceptions.

Metals are ............, i.e., they make sound when hit with an object.

chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

  1. sonorous

  2. lusturous

  3. reactive

  4. brittle

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Correct Option: A
Explanation:

Sound making property is known as sonority, i.e., when hit with an object they make sound.

The property of a metal of having a shiny surface is called:

chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

  1. luster.

  2. sonority.

  3. conductivity.

  4. All of the above.

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Correct Option: A
Explanation:

Gold, silver copper have shiny surfaces, as they are metals. So are lustrous.

The concentration of matter in a material is:

chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

  1. volume

  2. mass

  3. density

  4. none of these

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Correct Option: C
Explanation:

For a pure chemical, the mass concentration is equal to its density (mass divided by volume); thus the mass concentration of a component in a mixture can be called density of a component in a mixture.

Lustre is a property of:

chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

  1. metals.

  2. non-metals.

  3. metalloids.

  4. none of the above.

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Correct Option: A
Explanation:

Lustre is a property of metals i.e. they have a shiny surface.

Convert $19200\;kg/m^3$ into $g:cm^{-3}$.

chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

  1. $192\;g:cm^{-3}$

  2. $1.92\;g:cm^{-3}$

  3. $19.2\;g:cm^{-3}$

  4. $1920\;g:cm^{-3}$

Show answer
Correct Option: C
Explanation:
$1\;kg=1000\;g$
Conversion factor $ =\dfrac{1000\:gm}{1kg}$
$1\;m=100\;cm$
Conversion factor $ =\dfrac{1\:m}{100\:cm}$
$\therefore\;19200\;kg\:m^{-3}=19200\;kg\:m^{-3} \times\dfrac{1000\;g}{1\;kg}\times \begin{pmatrix}\dfrac{1\;m}{100\;cm}\end{pmatrix}^3$
$=19.200\;g/cm^3 = 19.2\:g\:cm^{-3}$

Mark the correct statement.
a) Metals lose their lustre on keeping in air.
b) Gold is lustrous.
c) Metals are lustrous and can be polished.

chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

  1. a, b

  2. b, c

  3. a, c

  4. All of the above

Show answer
Correct Option: D
Explanation:

Metals lose their lustre when kept exposed to air for long time and gets a dull appearance. It loses most of its shine and lustre.

Identity the non-lustrous element.

chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

  1. Bromine

  2. Iodine

  3. Silver

  4. Iron

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Correct Option: A
Explanation:

Iodine has lustrous appearance. Bromine is a non-metal so is non-lustrous. Silver and iron are metals and they are lustrous.