Tag: chemical properties and uses of metals and non-metals

Questions Related to chemical properties and uses of metals and non-metals

The tip of the lead pencil is made of:

chemistry metals chemical properties and uses of metals and non-metals introduction to metals physical properties of non-metals

  1. lead

  2. graphite

  3. zinc

  4. charcoal

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Correct Option: B
Explanation:

The tip of the lead pencil is made up of graphite.


Graphite can leave the grey mark on the paper. It was originally thought to be a part of lead. In spite of the name, the lead pencil does not contain lead.


Graphite is an allotrope of carbon, which is a good conductor of electricity and is resistant to many chemicals.

Graphite pencils are made of a mixture of clay and graphite.


Hence, te correct option is $\text{B}$

A non-metal which helps in the growth of plants is:

chemistry metals chemical properties and uses of metals and non-metals introduction to metals physical properties of non-metals

  1. sulphur

  2. hydrogen

  3. helium

  4. nitrogen

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Correct Option: D
Explanation:

Two major non-metals that enhance the growth of plants as constituents of fertilizers are nitrogen and phosphorus. Nitrogen helps in the leaf development and the green color of leaves is due to it. Phosphorus helps in the development of seeds and fruits and also as disease resistant.

Magnesium is used in fireworks.

chemistry metals chemical properties and uses of metals and non-metals introduction to metals physical properties of non-metals

  1. True

  2. False

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Correct Option: A
Explanation:
The reason of magical Colors of Fireworks
  • Red. strontium salts, lithium salts.
  • Orange. calcium salts.
  • Gold. incandescence of iron (with carbon), charcoal, or lampblack.
  • Yellow. sodium compounds.
  • White. white-hot metal, such as magnesium or aluminum.
  • Green. barium compounds + chlorine producer.
  • Blue. copper compounds + chlorine producer.

Pencil lead does not contain lead.

chemistry metals chemical properties and uses of metals and non-metals introduction to metals physical properties of non-metals

  1. True

  2. False

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Correct Option: A
Explanation:

There is no lead(element) in pencils. Rather, the core is made up of a non-toxic mineral called graphite. The common name 'pencil lead' is due to a historic association with the stylus made of lead in ancient Roman times.

Mercury is used as a thermometric liquid.

chemistry metals chemical properties and uses of metals and non-metals introduction to metals physical properties of non-metals

  1. True

  2. False

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Correct Option: A
Explanation:

It is true. Mercury is metal but at room temperature it exit in liquid state so it is use as a thermometric liquid. 

Which of the following non-metal is commonly used as pesticides and photography?

chemistry metals chemical properties and uses of metals and non-metals introduction to metals physical properties of non-metals

  1. Bromine

  2. Helium

  3. Selenium

  4. Iodine

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Correct Option: A
Explanation:

Bromine compounds are effective pesticides, used to prevent pests from attacking stored grain and other produce. Bromine compounds are also used  in photography. Several compounds are used to make the light-sensitive component of a photographic emulsion; without bromine compounds photographs would not capture sufficient light.

______ Is used as a purple coloured antiseptic solution.

chemistry metals chemical properties and uses of metals and non-metals introduction to metals physical properties of non-metals

  1. Bromine

  2. Chlorine

  3. Iodine

  4. Sulphur

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Correct Option: C
Explanation:

Elemental iodine is used as a disinfectant in various forms. It works as an antiseptic and kills not only bacteria but healing cells within the wound. Tincture of iodine is prepared by dissolving iodine in KI solution & then adding alcohol or spirit. It is widely used for treating woods as antiseptic

Determine which of the following match is correct:


List I List II
1 Phosphorus a fuel
2 Nitrogen b lights
3 Carbon c crackers
4 Oxygen d plant fertilizers
5 Neon e respiration

chemistry metals chemical properties and uses of metals and non-metals introduction to metals physical properties of non-metals

  1. 1-e, 2-a, 3-d, 4-c, 5-b

  2. 1-c, 2-d, 3-a, 4-e, 5-b

  3. 1-b, 2-d, 3-e, 4-a, 5-c

  4. 1-c, 2-d, 3-b, 4-e, 5-a

Show answer
Correct Option: B
Explanation:

Phosphorus is most commonly used in crackers. 


Nitrogen is a very common plant fertilizer. It is used by plants for growth. 

Carbon is a good source of fuel. 

Oxygen is the most important element in human life. Oxygen is used for respiration. 

Neon generates a bright reddish-orange color. Neon lights refer to various colors and lights.

A non-metal which is used for making electrode is:

chemistry metals chemical properties and uses of metals and non-metals introduction to metals physical properties of non-metals

  1. diamond

  2. cadmium

  3. graphite

  4. tin

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Correct Option: C
Explanation:

Since graphite is a good conductor of electricity, it is used for making electrodes.

Which of the following is/are use(s) of aluminium?

chemistry metals chemical properties and uses of metals and non-metals introduction to metals physical properties of non-metals

  1. It is used in paints

  2. It is used for packaging

  3. It is used to make electrical wires

  4. All of the above

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Correct Option: D
Explanation:

The uses of aluminium are:

  1. It is used in paints
  2. It is used for packing food
  3. It is used to make electrical wires