Question

Sodium hydroxide is usually used to clean
blocked drains. Which of the following options
gives the most suitable reason(s) for its use?
1. It is a mild acid that will not burn the
hands.
II. It is inexpensive and easily available.
III. It is slippery and hence, can easily enter the
blocked drain and clean it.
IV. It dissolves the grease that caused the
blockage.​

Answer 1

Answer:

option 3 is correct answer