Class XI

Hydorgen Chloride (HCl) is a
  1. ionic compound
  2. covalent compound
  3. metallic compound
  4. Both A and B
Empirical formula can be obtained if knowns are the
  1. %age or mass of each element
  2. relative atomic mass Ar
  3. structural formula
  4. Both A and B
Al+3 indicates that
  1. It needs -3 valency to become stable
  2. It has high positive charge
  3. Aluminum is found in Group-II
  4. Both A and B
Presence of pesticides and herbicides can be tested through
  1. careful distillation
  2. decanting
  3. boiling points
  4. chromatographs
Factors affecting speed of chemical reactions does not include
  1. Pressure on reactants
  2. Particle size of reactants
  3. Concentration of reactants
  4. Volume of reactants
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