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1
JEE Main 2023 (Online) 31st January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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$$\mathrm{H}_{2} \mathrm{O}_{2}$$ acts as a reducing agent in :

A
$$\mathrm{Mn}^{2+}+2 \mathrm{H}_{2} \mathrm{O}_{2} \rightarrow \mathrm{MnO}_{2}+2 \mathrm{H}_{2} \mathrm{O}$$
B
$$2 \mathrm{Fe}^{2+}+2 \mathrm{H}^{+}+\mathrm{H}_{2} \mathrm{O}_{2} \rightarrow 2 \mathrm{Fe}^{3+}+2 \mathrm{H}_{2} \mathrm{O}$$
C
$$\mathrm{Na}_{2} \mathrm{S}+4 \mathrm{H}_{2} \mathrm{O}_{2} \rightarrow \mathrm{Na}_{2} \mathrm{SO}_{4}+4 \mathrm{H}_{2} \mathrm{O}$$
D
$$2 \mathrm{NaOCl}+\mathrm{H}_{2} \mathrm{O}_{2} \rightarrow 2 \mathrm{NaCl}+\mathrm{H}_{2} \mathrm{O}+\mathrm{O}_{2}$$
2
JEE Main 2023 (Online) 29th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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Which of the given compounds can enhance the efficiency of hydrogen storage tank?

A
SiH$$_4$$
B
Li/P$$_4$$
C
NaNi$$_5$$
D
Di-isobutylaluminium hydride
3
JEE Main 2023 (Online) 25th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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Match List I with List II

List I List II
A. Cobalt catalyst I. $$\mathrm{(H_2+Cl_2)}$$ production
B. Syngas II. Water gas production
C. Nickel catalyst III. Coal gasification
D. Brine solution IV. Methanol production

Choose the correct answer from the options given below :

A
A-IV, B-III, C-I, D-II
B
A-IV, B-III, C-II, D-I
C
A-II, B-III, C-IV, D-I
D
A-IV, B-I, C-II, D-III
4
JEE Main 2023 (Online) 24th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

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

A
$$\mathrm{M{n^{2 + }} + {H_2}{O_2} \to M{n^{4 + }} + 2O{H^ - }}$$
B
$$\mathrm{HOCl + {H_2}{O_2} \to {H_3}{O^ + } + C{l^ - } + {O_2}}$$
C
$$\mathrm{PbS + 4{H_2}{O_2} \to PbS{O_4} + 4{H_2}O}$$
D
$$\mathrm{2F{e^{2 + }} + {H_2}{O_2} \to 2F{e^{3 + }} + 2O{H^ - }}$$
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