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

Quizzes (0) Questions (56)

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

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

The tip of the lead pencil is made of:

  1. lead

  2. graphite

  3. zinc

  4. charcoal
Reveal answer Fill a bubble to check yourself
B Correct answer
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 $\text{B}$

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

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

  1. sulphur

  2. hydrogen

  3. helium

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

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

Magnesium is used in fireworks.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
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.
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 is commonly used as pesticides and photography?

  1. Bromine

  2. Helium

  3. Selenium

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

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.