1 kg of NaOH is added to 10 ml of 0.1 N HCl, the resulting solution will

Options

A. turn blue litmus red
B. turn phenolphthalein solution pink
C. turn methyl orange red
D. will have no effect on red or blue litmus paper

Explanation

To solve the problem of determining the resulting solution when 1 kg of NaOH is added to 10 mL of 0.1 N HCl, we can follow these steps:

### Step 1: Calculate the number of equivalents of NaOH
To find the number of equivalents of NaOH, we use the formula:
\[ \text{Number of equivalents} = \frac{\text{mass (g)}}{\text{equivalent weight (g/equiv)}} \]
The equivalent weight of NaOH can be calculated as:
\[ \text{Equivalent weight of NaOH} = \frac{\text{Molar mass of NaOH}}{n \text{ factor}} \]
Where:
- Molar mass of NaOH = 23 (Na) + 16 (O) + 1 (H) = 40 g/mol
- Since NaOH is a monoacidic base, its n factor = 1.

Now, substituting the values:
\[ \text{Equivalent weight of NaOH} = \frac{40 \text{ g/mol}}{1} = 40 \text{ g/equiv} \]
Now, substituting this into the number of equivalents formula:
\[ \text{Number of equivalents of NaOH} = \frac{1000 \text{ g}}{40 \text{ g/equiv}} = 25 \text{ equivalents} \]

### Step 2: Calculate the number of equivalents of HCl
To find the number of equivalents of HCl, we use the formula:
\[ \text{Number of equivalents} = \text{Normality} \times \text{Volume (L)} \]
First, convert the volume from mL to L:
\[ 10 \text{ mL} = 0.01 \text{ L} \]
Now, substituting the values:
\[ \text{Number of equivalents of HCl} = 0.1 \text{ N} \times 0.01 \text{ L} = 0.001 \text{ equivalents} \]

### Step 3: Compare the number of equivalents
Now we compare the number of equivalents of NaOH and HCl:
- Equivalents of NaOH = 25 equivalents
- Equivalents of HCl = 0.001 equivalents

Since the number of equivalents of NaOH (25) is much greater than that of HCl (0.001), the solution will be basic.

### Step 4: Determine the effect on indicators
- **Blue litmus paper**: Turns red in acidic solutions (not applicable here).
- **Phenolphthalein**: Turns pink in basic solutions (applicable here).
- **Methyl orange**: Turns red in acidic solutions (not applicable here).
- **No effect on litmus**: Indicates a neutral solution (not applicable here).

### Conclusion
The resulting solution will turn phenolphthalein pink, indicating that the solution is basic.