Question

Which one of the following gives red colour with methyl orange?

• A. NaCl (Aq)
• B. Glucose (Aq)
• C. KOH (Aq)
• D. None of the above

Hint:

Remember that methyl orange is used to test acidity. It turns red in acidic conditions and yellow in basic conditions.

Answer 1

The Correct Option is C

Step 1: Understand the behaviour of methyl orange. Methyl orange is a pH indicator that changes color depending on the acidity or basicity of the solution: - In acidic solutions, methyl orange turns red. - In basic solutions, it turns yellow.
Step 2: Analyze the options. -
NaCl (Aq) is a neutral salt and does not affect the color of methyl orange. -
Glucose (Aq) is a neutral substance and does not affect the pH. -
KOH (Aq) is a strong base and would turn methyl orange yellow, but since it's not acidic, it won't turn red.
Step 3: Conclude. None of the above options would turn methyl orange red, as it requires an acidic solution. Therefore, the correct answer is
None of the above.