Tag: metals

Questions Related to metals

Non-metals are:

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

  1. soft

  2. hard

  3. brittle

  4. all of above

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Correct Option: C
Explanation:

Non-metals are very brittle and cannot be rolled into wires or pounded into sheets. They break easily when hit by a hammer.

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

Show answer
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

Show answer
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.

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

Show answer
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

Show answer
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. 

______________ 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. 

The elements which partially conduct electricity are called as __________.

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

  1. Conductors

  2. Insulators

  3. Semiconductors

  4. None of these

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Correct Option: C
Explanation:

Semiconductors are the elements which conduct electricity but in less quantity. Hence, they are called as semiconductors.

Non-metals do not show ductility due to absence of:

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

  1. metallic bonds which allow one electron to slip over another

  2. covalent bonds which gives strength

  3. ionic bonds which gives makes it hard

  4. co-ordinate bonds which which gives extra stability

Show answer
Correct Option: A
Explanation:
Non-metals do not show ductility due to absence of metallic bonds which allow one electron to slip over another. High degrees of ductility in metals occur due to metallic bonds. In metallic bonds valence shell electrons are delocalized and shared between many atoms. The delocalized electrons allow metal atoms to slide over one another without being subjected to strong repulsive forces that would cause non-metals to shatter.