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1
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
$$\mathrm{2F{e^{2 + }} + {H_2}{O_2} \to 2F{e^{3 + }} + 2O{H^ - }}$$
2
JEE Main 2022 (Online) 28th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

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

A
$$\mathrm{CaCO}_{3}$$ and $$\mathrm{MgCO}_{3}$$
B
$$\mathrm{Ca}(\mathrm{OH})_{2}$$ and $$\mathrm{Mg}(\mathrm{OH})_{2}$$
C
$$\mathrm{CaCO}_{3}$$ and $$\mathrm{Mg}(\mathrm{OH})_{2}$$
D
$$\mathrm{Ca}(\mathrm{OH})_{2}$$ and $$\mathrm{MgCO}_{3}$$
3
JEE Main 2022 (Online) 28th July Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

The metal salts formed during softening of hardwater using Clark's method are :

A
$$\mathrm{Ca}(\mathrm{OH})_{2}$$ and $$\mathrm{Mg}(\mathrm{OH})_{2}$$
B
$$\mathrm{CaCO}_{3}$$ and $$\mathrm{Mg}(\mathrm{OH})_{2}$$
C
$$\mathrm{Ca}(\mathrm{OH})_{2}$$ and $$\mathrm{MgCO}_{3}$$
D
$$\mathrm{CaCO}_{3}$$ and $$\mathrm{MgCO}_{3}$$
4
JEE Main 2022 (Online) 27th July Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language

Given below are two statements.

Statement I : Hydrogen peroxide can act as an oxidizing agent in both acidic and basic conditions.

Statement II : Density of hydrogen peroxide at $$298 \mathrm{~K}$$ is lower than that of $$\mathrm{D}_{2} \mathrm{O}$$.

In the light of the above statements, choose the correct answer from the options given below.

A
Both Statement I and Statement II are true.
B
Both Statement I and Statement II are false.
C
Statement I is true but Statement II is false.
D
Statement I is false but Statement II is true.
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