Class VII

Which of the following is used in match industry
  1. Sodium bicarbonate
  2. Sodium chloride
  3. Sodium carbonate
  4. Potassium chlorate
Lactic acid is found in
  1. Curd
  2. Soap
  3. Apple
  4. Lime
Acids turns blue litmus to ______
  1. Green
  2. Yellow
  3. Red
  4. Black
Acetic acid is found in
  1. Curd
  2. Spinach
  3. Vinegar
  4. Citrus fruits
Substances which are bitter in taste, feel soapy on touching are known as
  1. Acids
  2. Bases
  3. Indicators
  4. Neutral solution
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