For a reaction : `H_(2) + CI_(2) overset(hv)(to)2HCI`
Rate = k
(i) Write the order and molecularity of this reaction.
(ii) Write the unit of k.

Explanation

Let's solve the question step by step.

### Step 1: Identify the Reaction
The given reaction is:
\[ H_2 + Cl_2 \xrightarrow{hv} 2HCl \]

### Step 2: Determine the Order of the Reaction
The order of a reaction is defined as the sum of the powers of the concentration terms in the rate law expression. In this case, we have the rate given as:
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