Question

Which of the following is not a mixture.

• A. Cough syrup
• B. Muddy water
• C. Petrol
• D. Iron sulfide

Answer 1

The correct option is D

Iron sulfide

Combination of two or more components in a variable quantity (not in fixed ratio) is considered a mixture.

Here, option A (cough syrup) & option B (muddy water) and option C (petrol) are mixtures as they contain two or more components combined physically.

Option D (Iron sulfide) is not a mixture it is a compound made of iron and sulfur.