Tag: physical properties of metals and non-metals

Questions Related to physical properties of metals and non-metals

Why are non-metals not ductile?

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

  1. They are hard

  2. They are soft

  3. They are brittle

  4. All of above

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Correct Option: C
Explanation:

Non-metals are not ductile because they are brittle elements. They break easily. Such non-metals cannot be deformed by a hammer or rolling. 

Which of the following is non-ductile?

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

  1. Selenium

  2. Copper

  3. Aluminium

  4. Magnesium

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Correct Option: A
Explanation:

Selenium is a chemical element with symbol Se and atomic number 34. It is a nonmetal with properties that are intermediate between those of its periodic table column-adjacent chalcogen elements sulfur and tellurium. As it a non-metal, it cannot be deformed into a wire as it is brittle.

Iodine cannot be deformed into a wire because:

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

  1. it is a non-metal

  2. it is brittle

  3. both A and B

  4. none of above

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Correct Option: B
Explanation:

Iodine is a non-metal which is brittle in nature, it breaks and shatters easily when hammered. Hence, it cannot be used to make thin wires and is non-ductile.

Which of the following is not a property of non-metals?

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

  1. Non-metals can be stretched into thin wires

  2. Non-metals are not ductile

  3. Non-metals are not malleable

  4. Non-metals break easily

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Correct Option: A
Explanation:

Non-metals are non-malleable and non-ductile. They are brittle. They break easily. So, they are regarded as brittle. They can't be stretched into mines or hammered into sheets.

Brittleness is a characteristic property of:

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

  1. gaseous non-metals

  2. liquid non-metals

  3. solid non-metals

  4. none of the above

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Correct Option: C
Explanation:

Brittleness is a characteristic property of non-metals. And here, we consider solid non-metals only. It is not applicable to liquid or gaseous non-metals.

Non-metals do not have lustre which means:

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

  1. they do not have a shining surface

  2. they can't produce sound

  3. they can't conduct heat

  4. none of the above

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Correct Option: A
Explanation:

Non metals do not have  lustre which means that non-metals do not have a shining surface. That means they have a dull appearance.

Non metals are never used in cooking utensils because:

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

  1. they are good conductor of heat

  2. they are bad conductor of heat

  3. they can't cook food properly

  4. they are not attractive

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Correct Option: B
Explanation:

Non-metals are poor conductor of heat. So, they can't be used for cooking utensils.  

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

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

  1. be brittle

  2. conduct an electrical current

  3. have a shiny luster

  4. be malleable

  5. lose electrons

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Correct Option: A
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. 

Which is the lightest gas?

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

  1. ${N} _{2}$

  2. $He$

  3. ${O} _{2}$

  4. ${H} _{2}$

Show answer
Correct Option: D
Explanation:

Hydrogen and helium are the two lightest gasses,  they weigh so less that helium balloons and hydrogen dirigibles are able to float in the atmosphere.

______________ is the non-metal which conduct electricity.

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

  1. Carbon

  2. Nitrogen

  3. Oxygen

  4. Sulphur

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Correct Option: A
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.