Acids Bases And Salts Mock Tests

When a substance is added to water and the pH changes from 7 to 2, the substance is:

Which of the following substances has the highest pH value?

Which of the following solutions will have the lowest pH value?

A solution turns red litmus blue. To reverse this change and turn the blue litmus back to red, which substance should be added?

When calcium carbonate reacts with dilute hydrochloric acid, a gas is evolved that turns lime water milky. The gas is:

Baking soda is chemically known as:

An element X reacts with oxygen to form X₂O. This oxide dissolves in water to turn red litmus paper blue. Which of the following elements is most likely to be X?

The chemical name of baking soda is: