Class VII

Acids turns blue litmus to ______
  1. green
  2. yellow
  3. red
  4. black
The most commonly used natural indicator’ Litmus’ is extracted from
  1. Lichens
  2. Turmeric
  3. Beet Root
  4. China rose
Acetic acid is found in
  1. Curd
  2. Spinach
  3. Vinegar
  4. Citrus fruits
Which of the following is a strong acid?
  1. acetic acid
  2. nitric acid
  3. lactic acid
  4. citric acid
Lactic acid is found in
  1. Curd
  2. Soap
  3. Apple
  4. Lime
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