JEE Main 2023 (Online) 31st January Morning Shift | Hydrogen Question 17 | Chemistry

JEE Main 2023 (Online) 31st January Morning Shift

MCQ (Single Correct Answer)

-1

$$\mathrm{H}_{2} \mathrm{O}_{2}$$ acts as a reducing agent in

$$\mathrm{Mn}^{2+}+2 \mathrm{H}_{2} \mathrm{O}_{2} \rightarrow \mathrm{MnO}_{2}+2 \mathrm{H}_{2} \mathrm{O}$$

$$2 \mathrm{Fe}^{2+}+2 \mathrm{H}^{+}+\mathrm{H}_{2} \mathrm{O}_{2} \rightarrow 2 \mathrm{Fe}^{3+}+2 \mathrm{H}_{2} \mathrm{O}$$

$$\mathrm{Na}_{2} \mathrm{S}+4 \mathrm{H}_{2} \mathrm{O}_{2} \rightarrow \mathrm{Na}_{2} \mathrm{SO}_{4}+4 \mathrm{H}_{2} \mathrm{O}$$

$$2 \mathrm{NaOCl}+\mathrm{H}_{2} \mathrm{O}_{2} \rightarrow 2 \mathrm{NaCl}+\mathrm{H}_{2} \mathrm{O}+\mathrm{O}_{2}$$

JEE Main 2023 (Online) 29th January Morning Shift

MCQ (Single Correct Answer)

-1

Which of the given compounds can enhance the efficiency of hydrogen storage tank?

SiH$$_4$$

Li/P$$_4$$

NaNi$$_5$$

Di-isobutylaluminium hydride

JEE Main 2023 (Online) 24th January Evening Shift

MCQ (Single Correct Answer)

-1

In which of the following reactions the hydrogen peroxide acts as a reducing agent?

$$\mathrm{M{n^{2 + }} + {H_2}{O_2} \to M{n^{4 + }} + 2O{H^ - }}$$

$$\mathrm{HOCl + {H_2}{O_2} \to {H_3}{O^ + } + C{l^ - } + {O_2}}$$

$$\mathrm{PbS + 4{H_2}{O_2} \to PbS{O_4} + 4{H_2}O}$$

$$\mathrm{2F{e^{2 + }} + {H_2}{O_2} \to 2F{e^{3 + }} + 2O{H^ - }}$$

JEE Main 2022 (Online) 28th July Evening Shift

MCQ (Single Correct Answer)

-1

The products obtained during treatment of hard water using Clark's method are :

$$\mathrm{CaCO}_{3}$$ and $$\mathrm{MgCO}_{3}$$

$$\mathrm{Ca}(\mathrm{OH})_{2}$$ and $$\mathrm{Mg}(\mathrm{OH})_{2}$$

$$\mathrm{CaCO}_{3}$$ and $$\mathrm{Mg}(\mathrm{OH})_{2}$$

$$\mathrm{Ca}(\mathrm{OH})_{2}$$ and $$\mathrm{MgCO}_{3}$$

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