Class VII

Acids turns blue litmus to _ 
  1. Green 
  2. Yellow 
  3. Red 
  4. Black 
Which of the following colours is given by phenolphthalein in a basic salt solution . 
  1. Yellow 
  2. Pink 
  3. Orange red 
  4. Colourless 
Chemical name of Oil of Vitriol is _ 
  1. Nitric acid 
  2. Acetis acid 
  3. Sulphuric acid 
  4. Sodium Hydroxide 
Special type of substance used to test whether a substance is acidic/basic are known as 
  1. Indicators 
  2. Acids 
  3. Bases 
  4. Salt 
Which of the followinf is used in match industry . 
  1. Sodium chloride 
  2. Sodium bicarbonate 
  3. Sodium carbonate 
  4. Potassium chlorate 
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