The equation depicts the oxidizing nature of H₂O₂ among the following is-

1. $\begin{array}{l}{\mathrm{KIO}}_4+{\mathrm{H}}_2{\mathrm{O}}_2\to {\mathrm{KIO}}_3+{\mathrm{H}}_2\mathrm{O}+{\mathrm{O}}_2\end{array}$

2. $\begin{array}{l}2{\mathrm{I}}^{-}+{\mathrm{H}}_2{\mathrm{O}}_2+2{\mathrm{H}}^{+}\to {\mathrm{I}}_2+2{\mathrm{H}}_2\mathrm{O}\end{array}$

3. ${\mathrm{I}}_2+{\mathrm{H}}_2{\mathrm{O}}_2+2{\mathrm{OH}}^{-}\to 2{\mathrm{I}}^{-}+2{\mathrm{H}}_2\mathrm{O}+{\mathrm{O}}_2$

4. ${\mathrm{Cl}}_2+{\mathrm{H}}_2{\mathrm{O}}_2\to 2\mathrm{HCl}+{\mathrm{O}}_2$

The major product of the following reaction is:

${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{CH}={\mathrm{CH}}_2\frac{{\mathrm{H}}_2/\mathrm{CO}}{\mathrm{Rh}\text{\hspace{0.17em}catalyst\hspace{0.17em}}}$

1. 
2. 
3. 
4. 

Statements about heavy water are given below.

The correct statements are-

1. A, B, and C only

2. A and B only

3. A and D only

4. A and C only

(A) $\mathrm{HOCl}+{\mathrm{H}}_2{\mathrm{O}}_2\to {\mathrm{H}}_3{\mathrm{O}}^{+}+{\mathrm{Cl}}^{-}+{\mathrm{O}}_2$

(B) ${\mathrm{I}}_2+{\mathrm{H}}_2{\mathrm{O}}_2+2^{-}\mathrm{OH}\to 2{\mathrm{I}}^{-}+2{\mathrm{H}}_2\mathrm{O}+{\mathrm{O}}_2^{-}$

Choose the correct option:

The volume strength of 8.9 M H₂O₂ solution calculated at 273 K and 1 atm is-

(R = 0.0821 L atm K^–1 mol^–1) rounded off to the nearest integer)

1. 100

2. 80

3. 120

4.  60

The one that is not suitable for the removal of permanent hardness of water is:

1.  Treatment with sodium carbonate
2.  Calgon's method
3.  Clark's method
4.  Ion-exchange method

Dihydrogen of high purity (> 99.95%) is obtained through

The correct statements among (a) to (d) are:

1. (a), (b), (c) and (d)

2. (a), (c), and (d) only

3. (c) and (d) only

4. (a), (b) and (c) only

The synonym for water gas, when used in the production of methanol, is :
1. Fuel gas
2. Laughing gas
3. Syn gas
4. Natural gas

Hydrogen peroxide oxidises [Fe(CN)₆]^4– to [Fe(CN)₆]^3– in acidic medium but reduces [Fe(CN)₆]^3– to [Fe(CN)₆]^4– in alkaline medium. The other products formed are, respectively:

1. (H₂O + O₂) and H₂O

2. (H₂O + O₂) and (H₂O + OH^–)

3. H₂O and (H₂O + O₂)

4. H₂O and (H₂O + OH^–)