Please wait...
1800-212-7858 (Toll Free)
9:00am - 8:00pm IST all days
For Business Enquiry


Thanks, You will receive a call shortly.
Customer Support

You are very important to us

For any content/service related issues please contact on this toll free number


Mon to Sat - 11 AM to 8 PM

sir what are the important questions that may ask on board exams froms the chapter pblock and d block elements

Asked by SANAL KUMAR 24th February 2016, 6:19 PM
Answered by Expert


Here are some important topics/questions:

Trends in chemical reactivity of group 15 elements.
Dinitrogen - preparation
Allotropes of phosphorus- structure, preparation, manufacture.
Allotropes of sulphur-structure, preparation, manufacture.
Anomalous behaviour of fluorine.
Manufacture of chlorine.
How are xenon fluorides obtained?
Calculate the oxidation states of phosphorous in the given compound.
Oxoacids of halogens-reactions and properties.
Describe the manufacture H2SO4 by contact process?
Why are halogens strong oxidising agents?
How ammonia is manufactured industrially?


Interhalogen compounds 

Basicity of group 15 element

Most important topics/questions

  1. Structures of PCl5, H2SO3, H2SO4, H2S2O8, H2S2O7, HOCl, HClO2, HClO3, HClO4
  2. Complete the reactions:
  3. Conceptual questions:
  • 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?

The important topics/sections/questions from d and f-block elements are:

  • Why is Ce (IV) good analytical reagent?
  • General trends in the properties of transition and inner transition elements.
  • Ionisation energies and ionisation enthalpies.
  • Standard electrode potential (Eo) and Chemical reactivity of both d and f block elements
  • Complex formation
  • Alloy formation
  • Salts containing oxoanions of transition metals.
  • Why is the absorption bands narrow in f elements?
  • What happens at the third ionization enthalpy of f block elements?
  • List the irregularities in the actinide series compared to the lanthanide?
  • Compare the different characteristic of lanthanides and actinides?
  • Actinide contraction is greater from element to element than lanthanide contraction. Why?
  • List some practical applications of f block elements?
  • The chemistry of the actinide elements is not as smooth as that of the lanthanides. Justify?
  • Oxidation states of lanthanoids and actinoids

Hope this helps!!


Answered by Expert 24th February 2016, 6:40 PM
Rate this answer
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10

You have rated this answer /10

Your answer has been posted successfully!

Chat with us on WhatsApp