Chemistry - Chemistry of s and p-Block elements

Question - 1

which one of the following statements is true:

  • A s-and p-block elements are known as representation
  • B d-block elements are known as inner-transitions elements 
  • C f-block elements are known as inner-transitions elements
  • D all of the above

Question - 2

The general electronic configuration of s-block elements is

  • A ns0 np1-8
  • B ns2 np1-6
  • C ns1np1-6
  • D ns2np1-5

Question - 3

Which one of the following statements is not true about alkali metals?

  • A Lithium hydroxide on heating gives Li2O
  • B Lithium carbonate on heating gives Li2O
  • C Lithium nitrate on heating gives Li2O
  • D Sodium hydroxide on heating gives Na2O

Question - 4

Which one of the following statements is not true about alkali metals?

  • A It has a chain structure in solid state
  • B It can be prepared by heating BeO+C+CL2 at about 870-1070 K
  • C BeCl2 is a covalent component
  • D All of the above

Question - 5

Which one of following elements give crimson re colour to the flame?

  • A Na
  • B Li
  • C K
  • D Rb

Question - 6

Which one of the following alkali metal ions is the least hydrated in water

  • A Li+
  • B Na+
  • C K+
  • D Cs+

Question - 7

Which one of the following pairs of icons have the similar size?

  • A Be2+ and Al3+
  • B Be2+  and Mg2+
  • C B3+ and Al3+
  • D C4+ and Si4+

Question - 8

+1 oxidation state is more dorminant for lower elements of third group element.This is because of

  • A small size
  • B high electrongavity value
  • C high electron affinity value
  • D insect pair effect

Question - 9

The Lewis acid character of boron follow the order:

  • A Bl3>BBr3>BCl3>BF3
  • B BF3>BCl3>BBr3>Bl3
  • C BBr3>Bl3>BCl3>BF3
  • D Bl3>BF3>BBr3>BCl3

Question - 10

Anhydrous aluminium chloride is used as catalyst in 

  • A formation of Ch3OH from NaOH and CO
  • B in friedel Craft reaction
  • C in contact process for the manufacture of H2SO4
  • D None of the above
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