Acids turn blue litmus :a)Blueb)Redc)colourlessd)PinkCorrect answer is 'B'. Can you explain this answer?

Question

Answer

Answer

Indicators are usually acids themselves. Individual substances that act as indicators can exist with or without an H+ ion “stuck to them” and will be a different colour when they lose it. In the case of Litmus it is a mixture of similar substances that appear red when the H+ ion is still attached, so stays red or goes red in acid where there are a lot of these ions. Alkalis contain a great deal of Hydroxide ions and very low concentrations of Hydrogen ions. So litmus in alkalis loses its Hydrogen ions and we see its other colour, blue.

Answer

Blue - red acid

red- blue base

so correct option is B

Answer

Acids turn blue litmus red:

Acids are substances that release hydrogen ions (H+) when dissolved in water. One common test to identify acids is using litmus paper. Litmus paper is a type of pH indicator that changes color in response to the acidity or alkalinity of a solution.

Blue litmus paper:

Blue litmus paper is typically blue in color. It is used to test for the presence of acids. When an acid is added to blue litmus paper, the paper turns red. This color change occurs because acids donate protons (H+) to the litmus paper, causing a shift in the equilibrium of the dye present in the paper.

Explanation:

When an acid is added to blue litmus paper, the hydrogen ions (H+) from the acid react with the dye in the litmus paper. This reaction causes a change in the structure of the dye molecules, resulting in a red color. This color change is a characteristic response of acids when tested with blue litmus paper.

Therefore, the correct answer is option 'B' - Red. Acids turn blue litmus paper red due to the donation of hydrogen ions to the litmus dye, causing a color change in the paper.

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