Class VII

Tooth decay occurs in our mouth due to presence of
  1. bacteria
  2. virus
  3. fungus
  4. algae
Maximum amount of a solute which can dissolve in 100g of a solvent at room temperature is called
  1. solubility
  2. solution
  3. capacity
  4. eligibility
A tincture of iodine is made by dissolving iodine in alcohol which is an
  1. antiseptic
  2. anti-inflammatory
  3. anti-viral
  4. anti-fungal
Elements in air which are responsible for acid rain includes
  1. oxides of nitrogen
  2. Sulphur dioxide
  3. both a and b
  4. carbon dioxide
Paint get dissolved in
  1. alcohol
  2. turpentine
  3. water
  4. acetone
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