Question

Which of the following best describes an alkali?A. A soluble solid that forms H+ ions in a solution.B. A soluble solid that has a pH above 7.C. Any substance with a pH above 7.D. An insoluble solid that forms OH- ions in a solution.

Answer 1

Answer

C. Any substance with a pH above 7.

Explanation

Alkalis are water-soluble bases. bases that may be dissolved in water to produce OH⁻ ions are termed alkali. Alkali turns red litmus blue and is sour to taste. pH of an alkali substance is greater than 7.

Examples of alkali are NaOH, KOH, and Ca(OH)₂.

Hence, the answer which best describes an alkali is option C. Any substance with a pH above 7.