Class XI

Relative atomic mass of 3O3 is
  1. 48
  2. 140
  3. 380
  4. 180
Nucleon number of an element is equal to the
  1. Mass number of an element
  2. Number of protons and neutrons number of protons and neutrons
  3. Atomic number
  4. Both A and B
Formula of potassium sulphate is
  1. KSO3
  2. KSO4
  3. KHSO3
  4. K2SO4
Al2O3 + NaOH + H2O →
  1. NaClH3O4 (s)
  2. NaAl(OH)4 (aq)
  3. NaAl(OH)4 (s)
  4. NaClH3O4 (aq)
Mass of an element in a compound can be calculated through
  1. Ar of atoms/Mr of compound
  2. Mr of atoms/Ar of compound
  3. (Ar of atoms/Mr of compound) × mass of sample
  4. (Ar of atoms/Mr of compound) × mass of sample
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