Acids And Bases

The given reaction is: For this reaction, X can be a metal carbonate or a metal hydrogen carbonate, as both of these react with acids to release carbon dioxide, salt, and water. However, metal hydroxides do not release carbon dioxide when they react with acids; instead, they form salt and water. Therefore, metal hydroxides cannot be used as X in this reaction.

The correct option is (C): Both (1) and (2)

To detect whether a solution is acidic or basic, several methods can be used:

Phenolphthalein is a pH indicator that is colorless in acidic solutions and pink in basic solutions. It is commonly used to determine the acidity or basicity of a solution.
Metals can react with acids or bases, producing characteristic reactions that help indicate the presence of acids or bases.
Universal Indicator is a combination of several indicators and changes color over a range of pH values, making it useful for detecting both acidic and basic solutions.

The correct option is (D) : All of these