Match List-I with List-II, match the gas evolved during each reaction.

List-I	List-II
A. $$(NH_4)_2Cr_2O_7 \xrightarrow{\Delta}$$	I. $$H_2$$
B. $$KMnO_4 + HCl \to$$	II. $$N_2$$
C. $$Al + NaOH + H_2O \to$$	III. $$O_2$$
D. $$NaNO_3 \xrightarrow{\Delta}$$	IV. $$Cl_2$$

Choose the correct answer from the options given below

We need to identify the gas evolved in each reaction.

A. $$(NH_4)_2Cr_2O_7 \xrightarrow{\Delta}$$

Ammonium dichromate decomposes on heating:

$$(NH_4)_2Cr_2O_7 \xrightarrow{\Delta} Cr_2O_3 + N_2 + 4H_2O$$

Gas evolved: $$N_2$$

$$\Rightarrow$$ A matches with II

B. $$KMnO_4 + HCl \to$$

Potassium permanganate reacts with concentrated HCl:

$$2KMnO_4 + 16HCl \to 2KCl + 2MnCl_2 + 5Cl_2 + 8H_2O$$

Gas evolved: $$Cl_2$$

$$\Rightarrow$$ B matches with IV

C. $$Al + NaOH + H_2O \to$$

Aluminium dissolves in aqueous NaOH:

$$2Al + 2NaOH + 2H_2O \to 2NaAlO_2 + 3H_2$$

Gas evolved: $$H_2$$

$$\Rightarrow$$ C matches with I

D. $$NaNO_3 \xrightarrow{\Delta}$$

Sodium nitrate decomposes on strong heating:

$$2NaNO_3 \xrightarrow{\Delta} 2NaNO_2 + O_2$$

Gas evolved: $$O_2$$

$$\Rightarrow$$ D matches with III

The correct matching is: A-II, B-IV, C-I, D-III

Therefore, the correct answer is Option C.