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ELEMENTS AND METALS MCQs

Total Questions : 63 | Page 2 of 7 pages
Question 11.


Which metal pollute the air of a big city?



  1.    Copper
  2.    Chromium
  3.    Lead
  4.    Cadmium
 Discuss Question
Answer: Option C. -> Lead


Question 12.

. 

Balloons are filled with



  1.    nitrogen
  2.    helium
  3.    oxygen
  4.    argon
 Discuss Question
Answer: Option B. -> helium


Question 13.


Which of the following does not contain a coinage metal?



  1.    Silver and Gold
  2.    Zinc and Gold
  3.    Copper and Silver
  4.    Copper and Gold
 Discuss Question
Answer: Option B. -> Zinc and Gold


Question 14.

Air is a/an



  1.    compound
  2.    element
  3.    electrolyte
  4.    mixture
 Discuss Question
Answer: Option D. -> mixture


Question 15.


Production of
chlorofluorocarbons (CFC) gas which is proposed to be banned in India,
is used in which of the following domestic products?



  1.    Television
  2.    Refrigerator
  3.    Tube light
  4.    Cooking gas
 Discuss Question
Answer: Option B. -> Refrigerator


Question 16.


LPG consists of mainly



  1.    methane, ethane and hexane
  2.    ethane, hexane and nonane
  3.    methane, hexane and nonane
  4.    methane, butane and propane
 Discuss Question
Answer: Option D. -> methane, butane and propane


Question 17.


In fireworks, the green flame is produced because of



  1.    sodium
  2.    barium
  3.    mercury
  4.    potassium
 Discuss Question
Answer: Option B. -> barium


Question 18.


Marsh gas is



  1.    nitrogen
  2.    ethane
  3.    methane
  4.    hydrogen
 Discuss Question
Answer: Option C. -> methane


Question 19.

Diamond is an allotropic form of



  1.    germanium
  2.    carbon
  3.    silicon
  4.    sulphur
 Discuss Question
Answer: Option B. -> carbon


Question 20.


Permanent hardness of water can be removed by adding



  1.    chlorine
  2.    washing soda
  3.    potassium permanganate
  4.    bleaching powder
 Discuss Question
Answer: Option B. -> washing soda


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