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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

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  • Mica
  • Aluminium
  • Copper
  • Tin

Answer: Option B

2. The term PVC used in the plastic industry stands for

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  • polyvinyl carbobate
  • phosphor vanadiu chloride
  • phosphavinyl chloride

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3. The oxide of Nitrogen used in medicine as anaesthetic is ?

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  • Nitrous oxide
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Answer: Option A

4. A catalyst is a substance which

  • increases the activation energy
  • increases the rate of reaction and increases the equilibrium concentration of products
  • changes the equilibrium of a reaction so that the concentration of the product increases
  • hastens the attainment of equilibrium

Answer: Option D

5. pH of water is

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