Aqueous solution of sodium hydroxide turns blue litmus:a)Redb)No changec)Colourlessd)PinkCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

sodium hydroxide is base so it don't change the colour.

Answer

Since aqueous solution of sodium hydroxide is basic or alkaline in nature so it does not effect blue litmus.

Answer

Base changes red litmus to blue, but base with blue litmus doesn't have any change. No color change. Base  : Red>blue, Blue >blue Acid:  Blue >red Red >red

Answer

Explanation:

When an aqueous solution of sodium hydroxide (NaOH) is tested with blue litmus paper, there is no change in the color of the litmus paper. The litmus paper remains blue. This indicates that the solution is basic or alkaline in nature.

Reason:

The reason behind this observation is the chemical reaction that occurs between sodium hydroxide and the blue litmus paper. Sodium hydroxide is a strong base and it dissociates in water to produce hydroxide ions (OH-) and sodium ions (Na+).

NaOH → Na+ + OH-

When blue litmus paper is exposed to an alkaline solution, such as sodium hydroxide, there is no reaction between the solution and the litmus paper. The blue litmus paper is not sensitive to alkaline conditions and therefore, it does not change its color. It remains blue.

Interpretation:

The lack of change in the color of blue litmus paper when it comes in contact with an aqueous solution of sodium hydroxide indicates that the solution is basic or alkaline. This is because sodium hydroxide is a strong base and it increases the concentration of hydroxide ions in the solution, making it alkaline.

Other options:

a) Red: If the solution was acidic, the blue litmus paper would turn red. However, sodium hydroxide is a base and not acidic.

c) Colourless: A colorless solution would not have any effect on the color of the blue litmus paper. However, sodium hydroxide is basic and does affect the color of the litmus paper.

d) Pink: Pink color is generally associated with acidic conditions. Sodium hydroxide is basic and does not cause the blue litmus paper to turn pink.

Therefore, the correct answer is option 'B' - No change.

Answer

<div class='forumAnswer'>colourless</div>

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