The litmus dye is purple in color, which is removed?

Which of the following are strongly acidic?

Substances that have a sour taste and which makes a solution of blue litmus red are called?

An acid must contain mainly one atom which reacts with the metal to produce a gas.

What type of acid is found in curd?

What is the pH value of sodium hydroxide?

Herbs- The decomposition of vegetables into compost is an example of which reaction?

On heating copper powder in air, a layer of copper oxide accumulates on its surface. What is the color of this layer?