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Who proposed first atomic theory ?

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

Answer: Option C

Similar Questions :

1. Identify the wrong statement in the following

  • Atomic radius of the elements increases as one moves down the first group of the periodic table
  • Atomic radius of the elements decreases as one moves across from left to right in the 2nd period of the
  • Amongst isoelectronic species, smaller the positive charge on the cation, smaller is the ionic radius
  • Amongst isoelectronic species, greater the negative charge on the anion, larger is the ionic radius

Answer: Option C

2. Which one of the following is the softest?

  • sodium
  • iron
  • aluminium
  • lithium

Answer: Option A

3. Enzymes are

  • Fatty acids
  • Carbohydrates
  • Nucleic acids
  • Proteins

Answer: Option D

4. Which of the following is produced during the formation of photochemical smog ?

  • Nitrogen Oxides
  • Hydrocarbons
  • Methane
  • Ozone

Answer: Option D

5. Which one of the following metals does not react with water to produce Hydrogen?

  • Cadmium
  • Lithium
  • Potassium
  • Sodium

Answer: Option A

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