Class XI

Acidic oxides neutralize
  1. Bases
  2. Alkalis
  3. Salt solutions
  4. Both A and B
A white smoke consisting of fine white solid particles is formed by
  1. propane
  2. Butane
  3. Magnesium oxide
  4. Magnesium oxide magnesium oxide magnesium oxide
Reactivity series of metals is also called as the
  1. preferential series
  2. electrochemical series
  3. electrolytic series
  4. selective discharge series
 Tartaric acid is found in
  1. Grapes
  2. Apploe
  3. Lemon
  4. Oranges
Valency of carbonate ion CO3? is
  1. -1
  2. -2
  3. -3
  4. -4
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