Which of the following electrodes will act as anodes, when connected to Standard Hydrogen Electrode?
\(\begin{array}{rlr}\text { (a) } & \mathrm{{Al}^{3+} / {Al}} & \mathrm{{E}_{RP}^{o}=-1.66} \\\text { (b) } & \mathrm{{Fe}^{2+} / {Fe}} & \mathrm{{E}_{RP}^{o}=-0.44} \\\text { (c) } & \mathrm{{Cu}^{2+} / {Cu}} & \mathrm{{E}_{RP}^{o}=+0.34} \\\text { (d) } & \mathrm{{F}_{2}({~g}) / 2 {~F}^{-}({aq})} & \mathrm{{E}_{RP}^{o}=+2.87}\end{array}\)

   
The correct choice among the above is:

1. (a, b)

2. (b, c)

3. (c, d)

4. (a, d)

Which of the following statement(s) is/are correct regarding the given reaction?

$\mathrm{Zn}+2\mathrm{HCl}\to {\mathrm{ZnCl}}_2+{\mathrm{H}}_2$

(a) Zinc is acting as an oxidant

(b) Chlorine is acting as a reductant

(c) Hydrogen ion is acting as an oxidant

(d) Zinc is acting as a reductant

Options:

1. (a) &  (b)

2. (b) & (c)

3. (c) & (d)

4. (a) & (d)

 Atom(s) with outer most electronic configuration among the following that can show variable oxidation is

(a) 3s¹

(b) 3d³4s²

(c) 3d²4s²

(d) 3s²3p³

1. (a, b, c)

2. (b, c, d)

3. (a, b, d)

4. (a, c, d)

Identify the correct statements regarding the given reaction:

${\mathrm{P}}_4+3{\mathrm{OH}}^{-}+3{\mathrm{H}}_2\mathrm{O}\to {\mathrm{PH}}_3+3{\mathrm{H}}_2{\mathrm{PO}}_2^{-}$

1. (a, b)

2. (b, c)

3. (c, d)

4. (a, d)

Which of the following statements are not true about the following decomposition reaction?

$2{\mathrm{KClO}}_3\to 2\mathrm{KCl}+3{\mathrm{O}}_2$

The correct choice from the above is:

1. a, b and d

2. b, c and d

3. b, d and a

4. None of the above

Given below are two statements: 

Match the items in Column I with relevant items in Column II.

Codes:

Match Column I with Column II for the oxidation states of the central atoms.

Codes:

Which of the following arrangements represents the increasing oxidation number of the central atom?

1. ${\mathrm{CrO}}_2^{-},$ ${\mathrm{ClO}}_3^{-},$ ${\mathrm{CrO}}_4^{2-},$ ${\mathrm{MnO}}_4^{-}$

2. ${\mathrm{ClO}}_3^{-},$ ${\mathrm{CrO}}_4^{2-},$ ${\mathrm{MnO}}_4^{-},$ ${\mathrm{CrO}}_2^{-}$

3. ${\mathrm{CrO}}_2^{-},$ ${\mathrm{ClO}}_3^{-},$ ${\mathrm{MnO}}_4^{-},$ ${\mathrm{CrO}}_4^{2-}$

4. ${\mathrm{CrO}}_4^{2-},$ ${\mathrm{MnO}}_4^{-},$ ${\mathrm{CrO}}_2^{-},$ ${\mathrm{ClO}}_3^{-}$