NTPC CBT-2 Chemistry Quiz - 6

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Question 1:

In which of the following silicon is not used ?

Question 2:

Which of the following elements have the same physical and chemical properties ?

1) B

2) Na

3) Mg

4) Li

Question 3:

 If number of electrons in an atom is 5 and number of protons is also 5, then what is the atomic number of the atom?

Question 4:

Which of the following is a natural dye?

Question 5:

Colour of solution becomes blue – green when copper oxide reacts with hydrochloric acid due to formation of 

Question 6:

In pressure cooker , food cooks faster because 

Question 7:

Which one of the following metals is kept immersed in Kerosene oil to protect it and to prevent accidental fire ?

Question 8:

Consider the following statements about calcium ?

  1. Calcium form acidic oxide with air
  2. It floats over water
  3. It replaces iron from iron sulphate

The incorrect statements are-

Question 9:

Haber’s process is used in the formation of ammonia . which of the following is used as a promoter in haber’s process ?

Question 10:

Which of the following is used in making ointment for curing skin diseases ?