Tag: chemistry

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

______ Is used as a purple coloured antiseptic solution.

  1. Bromine

  2. Chlorine

  3. Iodine

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

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

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

  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
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

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

  1. Nitrogen

  2. Carbon

  3. Sulphur

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

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

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

  1. $Al$
  2. $Cu$
  3. $Co$
  4. $Zn$
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

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

  1. graphite

  2. dry ice

  3. both a and b

  4. none of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
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.