sir how to prepare .....this chapter...what all are the must topics to prrepare...i find difficult to remember the reactions..give me a solution please

Asked by Sounak das | 29th Oct, 2014, 05:32: PM

Expert Answer:

Go through the properties of p block elements and do comparative study. Properties are mostly asked.

Important topics in p-block elemets are:

Structures of Oxoacids: phosphorus (2007), sulphur (2007),

Structures of Fluoride: sulphur (2008), xenon (2008, 2009), bromine (2009)

Interhalogen compounds (2007)

Basicity of group 15 elements (2008, 2009)

Most important topics/questions

  1. tructures of PCl5, H2SO3, H2SO4, H2S2O8, H2S2O7, HOCl, HClO2, HClO3, HClO4
  2. Complete the reactions:
  3. Conceptual questions:
  4. Draw the resonating structures of:

a) NO
b) NO2
c) N2O

  • NF3 is an exothermic compound whereas NCl3 is not.
  • NH3 is a stronger base than PH3. Why?
  • Arrange the following in order of the indicated property:
    • F2, Cl2, Br2, I2 in increasing order of bond dissociation enthalpy
    • HF, HCl, HBr, HI in increasing order of acidic strength
    • NH3, PH3, AsH3, SbH3, BiH3 in increasing order of basic strength
  • What are interhalogen compounds?
  • Sulphur has very high boiling and melting point when compared to oxygen.
  • In group 16 tendencies to show -2 oxidation state decreases on going down the group.
  • In group 16 +4 oxidation state become more stable than +6 oxidation state on going down the group.
  • Oxygen can show a maximum covalency of 4 and it can not form hexa valent compound.
Also, refer to the revision notes provided by

Answered by Hanisha Vyas | 31st Oct, 2014, 11:03: AM

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