NTPC CBT-2 Chemistry Quiz - 72

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Question 1:

If there are two gases , nitrogen dioxide gas and carbon dioxide gas , both have same volume at same temperature and pressure  , then ratio of number of moles of gases is 

Question 2:

The vapour pressure of water at 200K  in a closed container is 0.2 atm . If the volume of container is doubled, its vapour pressure at 200 K will be

Question 3:

Which of the following metal is the best conductor of electricity?

Question 4:

Which one of the following types of glass can cut off ultraviolet rays ?

Question 5:

6 mg of mercury was found in a 5 L sample of water. What is the concentration (molarity) of mercury in ppm? (Atomic mass of mercury = 200 g / mol)

Question 6:

Number of molecules of water of crystallization in copper sulphate, sodium carbonate and Gypsum are

Question 7:

Which of the following is correct Dobereiner traid ?

Question 8:

How many coulombs are required to reduce 1 mole Cr2O72- to Cr3+?

Question 9:

Chemical formula of Baking soda

Question 10:

Which of the following statement is incorrect ?

  1. Atomic radius is measured in picometre.
  2. Atoms do not exist independently
  3. Atoms are the building block of all matters