Which of the following can show disproportionation reaction?
1. \(MnO^-_4\)
2. \(ClO^-_4\)
3. \(MnO^{2-}_4\)
4. \(F_2\)

Standard  reduction electrode potentials of three metals A, B and C are +0.5V , -3.0 V and -1.2 V respectively. The reducing power of these metals are:

What is the oxidation number of Cl in \(\text{CaOCl}_2\) (bleaching powder)?

1. Zero, because it contains Cl₂ 

2. -1, because it contains Cl^- 

3. +1, because it contains ClO^- 

4. +1 and -1 because it contains ClO^- and Cl^-

Which of the following processes is happening at the anode (from the options given below)?

1. \(\mathrm{F}_2+2 \mathrm{e}^{-} \rightarrow 2 \mathrm{~F}^{-}\)
2. \( \mathrm{H}^{+}+\frac{1}{2} \mathrm{O}_2+2 \mathrm{e}^{-} \rightarrow \mathrm{H}_2 \mathrm{O}\) 
3. \(2Cr^{3+}+7H_2O \rightarrow Cr_2O^{2-}_7 +14H^+ + 6e^-\)
4. None of the above

Which of the following is a redox reaction? 

1. NaCl  + KNO₃ \(\rightarrow\) NaNO₃  + KCl

2. CaC₂O₄  + 2HCl  \(\rightarrow\)  CaCl₂ + H₂C₂O₄  

3. Ca(OH)₂  + 2NH₄Cl  \(\rightarrow\)  CaCl₂ + 2NH₃ + 2H₂O 

4. 2K[Ag(CN)₂]  + Zn  \(\rightarrow\)  2Ag + K₂[Zn(CN)₄]

Amount of oxalic acid present in a solution can be determined by its titration with KMnO₄ solution in the presence of H₂SO₄. The titration gives unsatisfactory result when carried out in the presence of HCl, because HCl does which of the following?

1. It furnishes H⁺ ions in addition to those from oxalic acid

2. It reduces permanganate to Mn²⁺

3. It oxidises oxalic acid to carbon dioxide and water

4. It gets oxidised by oxalic acid to chlorine

Galvanization is applying a coating of which of the following metal?

Given 
\(\mathrm{E}_{\mathrm{Cr}^{3+} / \mathrm{Cr}}^0=-0.74 \mathrm{~V} ; \mathrm{E}_{\mathrm{MnO}_4^{-} / \mathrm{Mn}^{2+}}^0=1.51 \mathrm{V}\\{E}_{\mathrm{Cr}_2 \mathrm{O}_7^{2-} / \mathrm{Cr}^{3+}}^0=1.33 \mathrm{~V} ; \mathrm{E}_{\mathrm{Cl}_2 / \mathrm{Cl}^{-}}^0=1.36 \mathrm{~V}\)

Based on the data given above, strongest oxidizing agent will be:

Consider the following reaction :
\(a\mathrm{Cu}+b\mathrm{HNO}_{3} \rightarrow c\mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2}+d\mathrm{NO}+e\mathrm{H}_{2} \mathrm{O}\)
The values of a, b, and e in the reaction are, respectively:
1. 3, 8 and 4
2. 5, 2 and 8
3. 5, 2 and 16
4. 2, 5 and 8