The common name for the compound having formal NaOH is A. Caustic soda B. Caustic potash C. Soda ash D. Sodium hydroxide

Caustic soda
Caustic potash
Soda ash
Sodium hydroxide

The correct answer is A. Caustic soda.

Sodium hydroxide is a chemical compound with the formula

NaOH. It is a white solid that is highly soluble in water. It is a strong base and is commonly used in industry and in the home.

Caustic soda is a common name for sodium hydroxide. It is so named because it is a strong base that can cause severe burns if it comes into contact with skin or eyes.

Caustic potash is another name for potassium hydroxide. It is a strong base that is similar to sodium hydroxide, but it is not as commonly used.

Soda ash is another name for sodium carbonate. It is a salt that is used in many industrial processes. It is not a base and is not as caustic as sodium hydroxide.

In conclusion, the common name for the compound having formal NaOH is caustic soda.