Class IX

The number of moles for 52g of He is: (Atomic Mass of He: 4u)
  1. 1
  2. 13
  3. 52
  4. 6.022 × 10²³
The number of electrons in the outermost shell in the atom of an inert element is
  1. 0
  2. 1
  3. 2
  4. 8
Which of the following is not correctly matched?
  1. Gold - Au
  2. Silver - Ag
  3. Calcium - Ca
  4. Copper - Co
Law of Definite Proportions was proposed by:
  1. A Lavosier
  2. John Dalton
  3. Joseph Proust
  4. Wilhelm Ostwald
Formula for Aluminium Oxide is:
  1. AlO
  2. AlO₂
  3. Al₃O₂
  4. Al₂O₃
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