Class IX

An ionic compound is electrically
  1. positively charged
  2. neutral
  3. negatively charged
  4. none of above
Mass of an atom relative to C-12 is
  1. atomic mass
  2. atomic number
  3. nucleon number
  4. relative atomic mass
Gram atomic mass of Zn is
  1. 23g
  2. 12g
  3. 63.54g
  4. 56.67g
Formula mass of NaCl is
  1. 57.5 amu
  2. 58.5 amu
  3. 59.5 amu
  4. 60.0 amu
A free radical has
  1. odd no. of electrons
  2. even no. of electrons
  3. A and B both
  4. none of above
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