NEET UG CHEMISTRY MCQ: HYDROGEN

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Understanding +4 | -1

{\mathrm{H}_2}{\mathrm{O}_2}

restores the colour of old lead paintings,blackened by the action of

{\mathrm{H}_2}\mathrm{S}

gas,by:

View answer and explanation

Correct option: B

Oxidising

\mathrm{PbS}

\mathrm{PbS}{\mathrm{O}_4}

Option B (Oxidising

\mathrm{PbS}

\mathrm{PbS}{\mathrm{O}_4}

) is correct because

{\mathrm{H}_2}{\mathrm{O}_2}

oxidizes black lead sulfide (PbS) to white lead sulfate (

\mathrm{PbS}{\mathrm{O}_4}

), restoring the painting's color.

More Questions from HYDROGEN

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\mathrm{CaC}_2+\mathrm{H}_2 \mathrm{O} \longrightarrow \mathrm{Ca}(\mathrm{OH})_2+' \mathrm{X}\,'

\mathrm{Mg}_2 \mathrm{C}_3+\mathrm{H}_2 \mathrm{O} \longrightarrow \mathrm{Mg}(\mathrm{OH})_2+'\mathrm{Y}\,'

\mathrm{X}

\mathrm{Y}

{H_2}{O_2} \to 2{H^ + } + {O_2} + 2{e^ - };{E^0} = - 0.68V

{\mathrm{H}_\mathrm{2}}{\mathrm{O}_\mathrm{2}}

{\mathrm{H}_2}{\mathrm{O}_2}

{SiH}_4

AlH_3

{NH}_3