Class XI

 Combining Copper(II) (Cu+2) with Oxygen (O2) results in
  1. CuO
  2. Cu2O
  3. CuO2
  4. Cu(OH)2
 Ni is symbol of
  1. Neon
  2. Nitrogen
  3. Nickel
  4. Tin
Valence electrons refer to the
  1. total number of electrons
  2. total number of protons and neutrons in nucleus
  3. total number of electrons in outermost shell
  4. two electrons in duplet
In graph of decrease in mass against time, fastest reaction shows
  1. steepest curve
  2. less steep
  3. flat curve
  4. a plateau
 Aqueous Sulfuric Acid (H2SO4(aq)) contains
  1. Hydrogen ions
  2. Hydro oxide ions
  3. Sulfate ions
  4. All of these
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