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Who proposed first atomic theory ?

  • E.Rutherford
  • De Broglie
  • John Dalton
  • D.I.Mendeleef

Answer: Option C

Similar Questions :

1. Due to rusting the weight of iron

  • Decreases
  • Increases
  • Remains the same
  • Uncertain

Answer: Option B

2. pH of blood is ?

  • 10.4
  • 9
  • 7.4
  • 4

Answer: Option C

3. Conduction band electrons have more mobility than holes because they are

  • experience collision more frequently
  • experience collision less frequently
  • have negative charge
  • need less energy to move them

Answer: Option B

4. Mass number of a nucleus is :

  • the sum of the number of protons and neutrons present in the nucleus
  • always more than the atomic weight
  • always less than its atomic number
  • None of above

Answer: Option A

5. What is a mixture of potassium nitrate powdered charcoal and sulphur called?

  • paint
  • aluminium
  • brass
  • gun powder

Answer: Option D

Explanation:

gun powder is the mixture of potassium nitrate powdered charcoal and sulphur.

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