Indicators — task. Chemistry CBSE Live product, Class 10 (2026-27).

Choose the correct answer:

1. You are given three test tubes: A, B, and C. Red litmus turns blue in A, shows no change in B, and turns blue in C. Phenolphthalein turns pink in A, colourless in B, and pink in C. Identify the solutions

A: \(NaOH\), B: \(HCl\), C: \(NH_4OH\)
A: \(KOH\), B: \(HNO_3\), C: \(Ca(OH)_2\)
A: \(Mg(OH)_2\), B: \(CH_3COOH\), C: \(KOH\)
All of the above are possible

2. Methyl orange is added to dilute hydrochloric acid and aqueous sodium hydroxide. What is the colour of methyl orange in each solution?

Orange in \(HCl\), Red in \(NaOH\)
Red in \(HCl\), Orange in \(NaOH\)
Yellow in \(HCl\), Red in \(NaOH\)
Red in \(HCl\), Yellow in \(NaOH\)

Previous task

Exit to the topic

Next task

Send feedback

Did you find an error?

Send it to us!

2. Indicators

Question: