1.

Sodium nitrate on reduction with Zn in presence of NaOH solution produces NH_(3). Mass of sodium nitrate nitrate absorbing 1 mole of electron will be

Answer»

`7.750`
`10.625`
`8.000`
`9.875`

Solution :AMMONIA is formed by reduction of nitrates and nitrites with Zn and NaOH. Zn and caustic soda produce nascent hydrogen which reacts with nitrates to FORM ammonia.
`NaNO_(3)+8H^(+)+8e OVERSET(Zn//NaOH)(RARR) NaOH+NH_(3)+2 H_(2)O`
From the equation
Mass of `NaNO_(3)` absorbing 8 moles of electron `=85 g`
`:.` Mass of `NaNO_(3)` absorbing 1 mole of electron `=85/8=10.625 g`.


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