Jee preparation 2019

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

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

A - one mole of ammonia

B - two moles of nitric acid

C - one mole of nitric acid

D - two moles of ammonia

Answer

Mg3N2 + 6H2O → 3Mg(OH)2 + 2NH3

The correct option is D.


25th March 2019

jee preparation

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During the process of electrolytic refining of copper, some metals present as impurity settle as 'anode mud'. These are

During the process of electrolytic refining of copper, some metals present as impurity settle as 'anode mud'. These are

A - Ag and Au

B - Sn and Ag

C- Fe and Ni

D - Pb and Zn

Answer

In the electrolytic refining of copper the more electropositive impurities like Fe, Zn, Ni, Co, etc. dissolve in the solution and less electropositive impurities such as Ag, Au and Pt collect below the anode in the form of anodic mud.

The correct option is A.


25th March 2019

jee preparation

By