Class XI

 In Universal indicators, a pH of 7 is shown with
  1. Yellow color
  2. Green color
  3. Blue color
  4. Pink color
Symbol of Copper is
  1. Co
  2. Cu
  3. Cl
  4. Ca
If proton (p+) number of an element changes,
  1. it will become an isotope
  2. it will become another element
  3. It will become an electrolyte
  4. it will sublimate immediately
Old paintings can be restored through an oxidizing agent
  1. H2S
  2. H2O2
  3. H2PO4
  4. H3O
A pH of 7 is of
  1. Sugar solution
  2. Salt solution
  3. Weak acids and bases
  4. Both A and B
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