RRB GROUP D Chemistry Quiz - 34

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Question 1:

Which of the following detergents is used for cleaning clothes ?

Question 2:

Javelle water is an aqueous solution of which of the following?

Question 3:

Which of the following is/are the purest form of iron ?

Question 4:

Which oxides are used as drier in paints?

  1. Cobalt 
  2. Potassium 
  3. Manganese 
  4. Calcium

Question 5:

For hard soaps , which of the following solution is used in the saponification of fats or oils?