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  • Try this! Both lithium and magnesium display several similar properties due to the diagonal relationship; however, the one which is incorrect, is :

Both lithium and magnesium display several similar properties due to the diagonal relationship; however, the one which is incorrect, is :

 

  • Option 1)

    both form nitrides

  • Option 2)

    nitrates of both Li and Mg yield NO2 and O2 on heating

  • Option 3)

     both form basic carbonates

  • Option 4)

    both form soluble bicarbonates

 

Answers (1)

As we learned

 

Nature of carbonates of alkali metals -

Thermal stability and solubility of carbonates increases on moving down the group

- wherein

Li{_{2}}CO{_{3}}<K{_{2}}CO{_{3}}<Rb{_{2}}CO{_{3}}<Cs{_{2}}CO{_{3}}

 

 

Nature of carbonates of alkaline earth metals -

Insoluble in neutral medium but soluble in acid medium thermal stability

BaCO_{3}>SrCO_{3}>CaCo_{3}>MgCO_{3}

-

 

 Lithium can form Li2CO3 which is not basic in nature. Where as, Magnesium forms hydroxy carbonates which are basic in nature.

5MgCl_{2}(aq.)+5Na_{2}CO_{3}(aq.)+5H_{2}O(l)\rightarrow Mg\left ( OH \right )_{2}\cdot 3MgCO_{3}\cdot 3H_{2}O(s)\cdot +Mg\left ( HCO_{3} \right )_{2}+10NaCl(aq.)

 

 


Option 1)

both form nitrides

Option 2)

nitrates of both Li and Mg yield NO2 and O2 on heating

Option 3)

 both form basic carbonates

Option 4)

both form soluble bicarbonates

Posted by

subam

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