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MCQs

Total Questions : 1678 | Page 161 of 168 pages
Question 1601. The number of lone pairs in XeOF4 is_________?
  1.    O
  2.    1
  3.    2
  4.    3
 Discuss Question
Answer: Option B. -> 1
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1602. The average salinity of sea water is________?
  1.    3%
  2.    3.5%
  3.    2.5%
  4.    2%
 Discuss Question
Answer: Option B. -> 3.5%
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1603. Marsh gas is_______?
  1.    Nitrogen
  2.    Ethane
  3.    Methane
  4.    Hydrogen
 Discuss Question
Answer: Option C. -> Methane
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1604. The chemical (Ethyl Mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of:_______?
  1.    Bromine
  2.    Fluorine
  3.    Chlorine
  4.    Sulphur
 Discuss Question
Answer: Option D. -> Sulphur
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1605. A process used for the Concentration of Ore is________?
  1.    Roasting
  2.    Forth flotation
  3.    Electrolysis
  4.    Distillation
 Discuss Question
Answer: Option B. -> Forth flotation
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1606. Which Oxide of Manganese is amphoteric?
  1.    MnO2
  2.    Mn2O3
  3.    Mn2O7
  4.    MnO
 Discuss Question
Answer: Option A. -> MnO2
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1607. Which set of quantum numbers is not allowed?
  1.    n=2,l=1,m1=0,ms=+1/2
  2.    n=2,l=1,m1=-1,ms=+1/2
  3.    n=2,l=0,m1=0,ms=-1/2
  4.    n=2,l=2,m1=1,ms=-1/2
 Discuss Question
Answer: Option D. -> n=2,l=2,m1=1,ms=-1/2
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1608. The purpose of Smelting an ore is to________?
  1.    Reduce it
  2.    Oxidize it
  3.    Obtain an alloy
  4.    Separate volatile impurities
 Discuss Question
Answer: Option A. -> Reduce it
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1609. Find the PH of a 0.001 M solution of Nitric acid HNO3?
  1.    2
  2.    3
  3.    4
  4.    5
 Discuss Question
Answer: Option B. -> 3
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1610. Potassium Permanganate is used for purifying drinking water, because_________?
  1.    It is a sterilising agent.
  2.    It dissolves the impurities of water.
  3.    It is a reducing agent.
  4.    It is an oxidising agent.
 Discuss Question
Answer: Option D. -> It is an oxidising agent.
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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