Which of the following statement is/are correct?

Options

A. KCl is a substitute for NaClfor patients of high blood pressure
B. KOH is a stronger alkali than NaOH
C. KOH is used in the manufacturing of soft soap
D. NaOH is a non-deliquescent white crystalline solid

Answer

To determine which of the statements regarding KCl, KOH, and NaOH are correct, we will analyze each statement one by one.

### Step 1: Analyze the first statement
**Statement:** KCl is a substitute for NaCl for patients with high blood pressure.

**Analysis:**
High blood pressure (hypertension) is often linked to high sodium (Na⁺) levels in the body. KCl (potassium chloride) can be used as a substitute for NaCl (sodium chloride) because it provides potassium (K⁺) instead of sodium. This helps to manage sodium intake while still providing a similar taste. Therefore, this statement is **correct**.

### Step 2: Analyze the second statement
**Statement:** KOH is a stronger alkali than NaOH.

**Analysis:**
The strength of an alkali is related to its ionic character. As the size of the cation increases, the ionic character increases, leading to stronger alkalinity. K⁺ is larger than Na⁺, which means KOH has a higher ionic character than NaOH. Thus, KOH is indeed a stronger alkali than NaOH. Therefore, this statement is **correct**.

### Step 3: Analyze the third statement
**Statement:** KOH is used in the manufacturing of soft soap.

**Analysis:**
Soaps are typically made from the saponification of fats and oils, which involve the reaction of fatty acids with a strong base. KOH is a strong base and can be used to produce potassium soaps, which are softer than sodium soaps. Therefore, this statement is **correct**.

### Step 4: Analyze the fourth statement
**Statement:** NaOH is a non-deliquescent white crystalline solid.

**Analysis:**
NaOH (sodium hydroxide) is indeed a white crystalline solid; however, it is **deliquescent**, meaning it absorbs moisture from the air and can dissolve in the absorbed water, forming a solution. Therefore, this statement is **incorrect**.

### Conclusion
- The first three statements (about KCl, KOH, and its use in soap) are **correct**.
- The last statement about NaOH being non-deliquescent is **incorrect**.

### Final Answer
The correct statements are:
1. KCl is a substitute for NaCl for patients with high blood pressure. (Correct)
2. KOH is a stronger alkali than NaOH. (Correct)
3. KOH is used in the manufacturing of soft soap. (Correct)
4. NaOH is a non-deliquescent white crystalline solid. (Incorrect)