Tag: metals

Quizzes (9) Questions (306)

Questions Related to metals

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

Generally, non-metals are not lustrous. Which of the following non-metal is lustrous?

  1. Sulphur

  2. Oxygen

  3. Nitrogen

  4. Iodine
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Lustre means shine. Shining metals are also called lustrous metal. For example, gold. Non-metals such as sulphur, oxygen, nitrogen are non-lustrous but iodine is a greyish black solid and crystals have a metallic lustre.

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

Non metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.

The allotropic form of a non-metal, which is a good conductor of electricity is: 

  1. Graphite

  2. Diamond

  3. Rhombic sulphur

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Graphite, which is an allotrope of carbon, is a good conductor of electricity.

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

Boojho has learnt that non-metals on beating with a hammer are generally broken into pieces. Which of the following is a non-metal?

  1. Iron nail

  2. Aluminium wire

  3. Copper plate

  4. Piece of coal
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

All are metals in the given options iron, aluminium and copper but only carbon is a nonmetal present which is breakable with a hammer.

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

Which of the following are uses of sulphur?

  1. Sulphur is used in preparation of conducting wires

  2. A mixture of zinc and sulphur on heating with sulphur produces a greyish residue of zinc sulphide

  3. Sulphur is an element belonging to VI A group

  4. Sulphur is a nonmetallic element.
Reveal answer Fill a bubble to check yourself
B,C,D Correct answer
Explanation

Zinc on heating with sulphur produces a greyish residue of zinc sulphide.
Sulphur is an element belonging to VI A group.
Sulphur is a nonmetallic element.

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

Diamond and graphite are good conductors of electricity.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Graphite is able to conduct electricity, due to delocalization of the pi bond electrons above and below the planes of the carbon atoms. These electrons are free to move, so are able to conduct electricity.
In diamond, all four outer electrons of each carbon atom are 'localized' between the atoms in covalent bonding. The movement of electrons is restricted and diamond does not conduct an electric current.
Thus, graphite is a good conductor and diamond is not. 
Option "B" is correct.

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

Which of the following is a good conductor of electricity?

  1. Diamond

  2. Graphite

  3. Both A and B

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Diamond and graphite are allotropes of carbon. Graphite has carbon molecules held together by weak van der Waal's forces of attraction and they have loosely bound electrons which are responsible for conducting electricity, while diamond is the hardest and strongest material in which all the molecules are bound by strong bonding between carbon tetrahedrons held by strong forces of attraction and so, they do not have free or loosely bound electrons to conduct electricity.

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

Which of the following does not conduct electricity in its molten state?

  1. Iron

  2. Magnesium oxide

  3. Lithium fluoride

  4. Sulphur
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sulphur is a non-metal so it does not conduct electricity. Iron is a metal so it conducts electricity Magnesium oxide and Lithium fluoride are ionic compounds that contains ions which conducts electricity in molten state.

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

Which characteristics are required for a element to behave as electrical conductor?

  1. It should have valence electron

  2. It should have free electron

  3. It easily provide electron to other element
  4. Both $B$ and $C$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Electrical conductors elements have free electrons, which they can easily provide to conduct electricity. This characteristics are generally available in metals.