10 mL of 1 N HCl, 25 mL of 2 N `H_(2)SO_(4)` and 40 mL of X N `HNO_(3)` are mixed and made up to 2000 mL. 100 mL of this solution required 30 mL of NaOH taken from a solution containing 4 g of NaOH in 250 mL of solution. What is the value of X ?

Explanation

To solve the problem step by step, we will follow these calculations:

### Step 1: Calculate the Normality of NaOH Solution
We know that:
- Weight of NaOH = 4 g
- Volume of NaOH solution = 250 mL

First, we need to calculate the number of moles of NaOH:
...