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Engineering
895 Views   |  

One mole of magnesium nitride on the reaction with an excess of water gives

  • Option 1)

    one mole of ammonia

  • Option 2)

    one mole of nitric acid

  • Option 3)

    two moles of ammonia

  • Option 4)

    two moles of nitric acid.

 
As we learnt in Action of alkaline earth metals with nitrogen - form nitrides when of the type  these hydrolysed with water evolving NH3 - wherein                                                  3 Moles              2 Moles                                             Option 1) one mole of ammonia This option is incorrect. Option 2) one mole of nitric acid This option is...
Engineering
462 Views   |  

Beryllium and aluminium exhibit many properties which are similar. But, the two elements differ in

  • Option 1)

    exhibiting maximum covalency in compounds

  • Option 2)

    forming polymeric hydrides

  • Option 3)

    forming covalent halides

  • Option 4)

    exhibiting amphoteric nature in their oxides.

 
As we learnt in Diagonal relationship - Similarity in properties between first element of a group and second element of the next group - wherein This is due to similarity in sizes of their ions, and charge / radius ratio   and      Anomalous behavious beryllium - 1) Due to small atomic and ionic size 2) High ionisation energy 3) No vacant d-orbitals 4) High hydration energy -   Due to diagonal...
Engineering
116 Views   |  

Among the properties (A) reducing  (B)  oxidising  (C) complexing, the set of properties shown by CN^{-} ion towards metal species is

  • Option 1)

    A,B\;

  • Option 2)

    \; B,C\;

  • Option 3)

    \; C,A\;

  • Option 4)

    \; A,B,C

 
As we learnt in Reducing property of metal-ammonia solution - A powerful reducing agent - wherein Due to the presence of free ammoniated electrons    is shown reducing as well as complexing property.    Option 1) This option is incorrect. Option 2) This option is incorrect. Option 3) This option is correct. Option 4) This option is incorrect.
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