An aqueous solution of 6.3 g oxalic acid dihydrate is made up to 250 mL. The volume of 0.1 N NaOH required to completely neutralize 10 mL of this solution is

1. 4 mL

2. 20 mL

3. 40 mL

4. 60 mL

KMnO₄ (mol. wt=158) oxidizes oxalic acid in acidic medium to CO₂ and water as follows.

$5{\mathrm{C}}_2{\mathrm{O}}_4^{2-}+2{\mathrm{MnO}}_4^{-}+16{\mathrm{H}}^{+}\to 10{\mathrm{CO}}_2+2{\mathrm{Mn}}^{2+}+8{\mathrm{H}}_2\mathrm{O}$

What is the equivalent weight of KMnO₄?

1. 158

2. 31.6

3. 39.5

4. 79

The equivalent weight of MnSO₄ is half its molecular weight when it is converted to

1. MnO

2. ${\mathrm{MnO}}_4^{2-}$

3. ${\mathrm{MnO}}_2$

4. ${\mathrm{MnO}}_4^{-}$

Among the following, identify the species with an atom in +6 oxidation state-

1. MnO₄^-

2. Cr(CN)₆^3-

3. NiF₆^2-

4. CrO₂Cl₂

Which of the following does not represent a redox reaction?

1. Cr₂O₇^2- + 2OH^- $\to$CrO₄^2- + H₂O

2. SO₄^2- + 2I^- + 2H⁺ $\to$I₂ + H₂S + H₂O

3. Ca + 2H₂O → Ca(OH)₂ + H₂

4. PCl₅ $\to$PCl₃ + Cl₂

The oxidation number of phosphorous in ATP (adenosine triphosphate) is -

The species that does not contain peroxide ions is :

(1) PbO${}_2$

(2) H${}_2$O${}_2$

(3) SrO${}_2$

(4) BaO${}_2$

What is the alteration in the oxidation state of carbon in the given reaction?

\(\mathrm{{CH_4}_{(g)} + 4{Cl_2}_{(g)} \rightarrow {CCl_4}_{(l)} + 4 HCl_{(g)}}\)

In the given reaction, what is the name of the species that bleaches the substances due to its oxidising action?

Cl₂(g) + 2OH^-(aq) → ClO^-(aq) + Cl^-(aq) + H₂O(l)

1. ClO^- 

2. Cl₂

3. Cl^-

4. Both ClO^- and Cl^-