NEET UG CHEMISTRY MCQ: HYDROGEN

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Analyzing +4 | -1

Assertion (A) : On passing

\mathrm{H}_2

gas into aqueous

\mathrm{Fe}^{3+}

solution, resulting solution gives test of

\mathrm{Fe}^{3+}

.

Reason (R):

\mathrm{H}_2(g)

reduces

\mathrm{Fe}^{3+}

\mathrm{Fe}^{2+}

but

\mathrm{Fe}^{2+}

is oxidised to

\mathrm{Fe}^{3+}

by atmospheric oxygen.

View answer and explanation

Correct option: C

\mathbf{A}

is true but

\mathbf{R}

is false.

Option C (

\mathbf{A}

is true but

\mathbf{R}

is false) is correct because while adding H2 to Fe3+ doesn't maintain the Fe3+ test due to reduction, the reason given about oxidation by atmospheric oxygen is not the primary factor.

More Questions from HYDROGEN

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Hydrogen accepts an electron to form inert gas configuration. In this it resembles

\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}\,'

The products '

\mathrm{X}

' and '

\mathrm{Y}

' respectively are

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

This equation represents which of the following behaviour of

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

Which reaction shows oxidizing nature of

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

? Which of the following could act as propellent for rockets. (A):

{SiH}_4

AlH_3

and

{NH}_3

are ionic hydrides

(R):Ionic hydrides do not react with water