Tag: chemistry

Questions Related to chemistry

______ 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

Show answer
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

Show answer
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

Show answer
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

Metal which is silvery light, malleable and ductile and the boiling point is around $2050^\circ C$ is:

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

  1. zinc

  2. iron

  3. aluminium

  4. tin

Show answer
Correct Option: C
Explanation:

Metal which is silvery light, malleable and ductile and the boiling point is around $2050 ^\circ C$ is aluminium.

Which was the first metal used?

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

  1. Iron

  2. Copper

  3. Zinc

  4. Gold

Show answer
Correct Option: B
Explanation:

Metals were discovered and starts using approximately 5000 years ago. First metal to be used was the copper. Then after silver and gold. These metals were found in free state in nature.

Metals used to make bullet proof alloy steels is:

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

  1. titanium

  2. zirconium

  3. magnetite

  4. silicon

Show answer
Correct Option: A
Explanation:

Metals used to make bullet proof alloy steel is to titanium.

Which of the following non-metal can be used as plant fertilizer and for plant fixation?

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

  1. Nitrogen

  2. Carbon

  3. Sulphur

  4. Iodine

Show answer
Correct Option: A
Explanation:

Nitrogen is used by plants for fixation in the form of nitrates. It can also be used by to prepare ammonia which can in turn be used as nitrogen fertilizers. Liquid nitrogen can also be used to prevent food at a very low temperature.

Which of the following metal is used for galvanising iron to protect it from rusting?

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

  1. $Al$

  2. $Cu$

  3. $Co$

  4. $Zn$

Show answer
Correct Option: D
Explanation:

Zinc is used for galvanising iron to protect it from rusting. Using a less reactive metal than iron would allow iron to get in contact with air & moisture somehow which will lead to peeling up of the covering metal. Zinc is used because Zn corrodes faster than Iron protecting the Fe surface from corrosion.

Carbon in the form of .................. can be used in preparation of pencil.

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

  1. graphite

  2. dry ice

  3. both a and b

  4. none of the above

Show answer
Correct Option: A
Explanation:

Graphite contains carbon atoms in hexagonal rings, which are joined to form layers. Graphite is a good conductor of heat and electricity. Since graphite contains free electrons, it is a good conductor of heat and electricity. Carbon in the form of graphite is useful in the preparation of pencils.