NTPC CBT-2 Chemistry Quiz - 10

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Question 1:

Which of the following elements called representative elements ?

Question 2:

What is the name of the process in which a solid substance converts to gaseous state without going through liquid state ?



Question 3:

Element in the same group is similar in-

Question 4:

Which of the following is used in softening of water ?

  1. Calcium hydroxide
  2. Sodium carbonate 
  3. Calcium oxide
  4. Magnesium hydroxide

Question 5:

Which of the following is used in the treatment of lead poisoning ?

Question 6:

The effect of the Heisenberg Uncertainty Principle is significant only for-

Question 7:

According to early Indian philosophers, what are the basic elements described in Pancha Tattva?

Question 8:

Which of the following statement is incorrect  ?

  1. Carbon compounds are good conductor of electricity 
  2. They have high melting point 

Question 9:

The residue that left in the destructive distillation of coal and used as a reducing agent in the extraction of metals is

Question 10:

Gases neither have definite shape nor definite volume . To liquefy the gases , conditions required are