If a few drops of a concentrated acid accidentally spills over the hand of student what should be done?

Options

A. wash the hand with saline solution
B. wash the hand immediately with plenty of water and apply a paste of sodium hydrogen carbonate
C. After washing with plenty of water apply solution of sodium hydroxide on the hand
D. Neutralise the acid with a strong alkali

Explanation

**Step-by-Step Solution:**

1. **Immediate Action**: If concentrated acid spills on the skin, the first step is to immediately rinse the affected area with plenty of water. This helps to dilute and wash away the acid, minimizing skin damage.

2. **Rinse Thoroughly**: Continue rinsing the area for at least 15-20 minutes. This ensures that all traces of the acid are removed from the skin. It is important to use running water rather than just a small amount to effectively wash away the acid.

3. **Neutralization**: After thoroughly rinsing the skin, the next step is to neutralize any remaining acid. A mild base, such as sodium bicarbonate (baking soda), can be used for this purpose.

4. **Prepare the Paste**: Make a paste of sodium bicarbonate by mixing it with a small amount of water. This paste can then be applied to the affected area to help neutralize any residual acid and reduce irritation.

5. **Apply the Paste**: Gently apply the sodium bicarbonate paste to the affected area and leave it on for a few minutes. This will help in neutralizing the acid and alleviating any burning sensation.

6. **Seek Medical Attention**: After taking these steps, it is advisable to seek medical attention, especially if there are any signs of severe burns or if the irritation persists.