Statements about heavy water are given below.

A.	Heavy water is used in exchange reactions for the study of reaction mechanisms.
B.	Heavy water is prepared by exhaustive electrolysis of water.
C.	Heavy water has a higher boiling point than ordinary water.
D.	Viscosity of H2O is greater than D2O.

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

Among the following statements about water, the FALSE statement is-

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

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

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^–)

(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 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. 

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

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