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Standard XII

Chemistry

Sulphuric Acid

A colourless ...

Question

A colourless salt gives a white ppt (soluble in ammonium acetate) and a brown coloured pungent gas on reaction with $c o n c . H_{2} S O_{4}$ salt is:

B a (N O_{3})_{2}

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P b (N O_{3})_{2}

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N a N O_{3}

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N H_{4} N O_{3}

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Solution

The correct option is B $P b (N O_{3})_{2}$
$4 N O_{3}^{-} + 2 H_{2} S O_{4} \to 4 N O_{2}^{-} R e d d i s h B r o w n V a p o u r s + 2 S O_{4}^{2 -} + 2 H_{2} O + O_{2} ↑$
Nitrates produces reddish-brown vapours of nitrogen dioxide on treatment with concentrated $H_{2} S O_{4}$ .
and lead gives white ppt. so compound is $P b (N O_{3})_{2}$ .

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A colourless salt gives a white ppt (soluble in ammonium acetate) and a brown coloured pungent gas on reaction with conc.H2SO4 salt is:

The correct option is B Pb(NO3)24NO−3+2H2SO4→4NO−2ReddishBrownVapours+2SO2−4+2H2O+O2↑Nitrates produces reddish-brown vapours of nitrogen dioxide on treatment with concentrated H2SO4.and lead gives white ppt. so compound is Pb(NO3)2.

A colourless salt gives a white ppt (soluble in ammonium acetate) and a brown coloured pungent gas on reaction with $c o n c . H_{2} S O_{4}$ salt is: