NDA CHEMISTRY QUIZ-2

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Question 1:

Consider the following statements?

A- Coal is used as fuel.

B- Coal is used for the manufacture of synthetic petrol and synthetic natural gas.

C- Coal is used in the extraction of metals.

D- Coal is used as a source of many organic compounds such benzene , toluene etc.

The correct statements are-

Question 2:

A man purchased A to use it as fuel. What qualities A should posses?

  1. Low calorific value and cheap
  2. High calorific value and cheap
  3. Moderate calorific value and leave no residue after burning
  4. Leave no residue after burning 

Question 3:

Match the following-

Question 4:

Which of the following non-metal is used in the manufacture of gun powder?

Question 5:

A metal is used for making automobile batteries is-

Question 6:

Which of the following is/are used for removing permanent hardness of water?

  1. Potassium chloride
  2. Sodium carbonate
  3. Calcium hydroxide
  4. Ammonium chloride

Question 7:

The first element in each period has 1 valence electron and the last element in each period has ________ electrons. ( except Helium).

Question 8:

Who invented the periodic table?

Question 9:

_______is least reactive element belonging to group 17.

Question 10:

Which of the following metals can form amphoteric oxides?