Element, Compound & Mixture — Homi Bhabha Exam Chemistry MCQs with Solutions
Free Homi Bhabha Exam Chemistry Element, Compound & Mixture MCQs with step-by-step solutions (6 questions). Part of Matter & Its States. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Element, Compound & Mixture · medium · theory
A pure substance made up of only one kind of atom is called an:
A. compound
B. element ✓ Correct
C. mixture
D. alloy
Solution: An element consists of just one type of atom (e.g. oxygen, gold).
Q2 — Element, Compound & Mixture · hard · theory
A compound differs from a mixture because in a compound the components are:
A. physically mixed in any ratio
B. easily separated by filtration
C. chemically combined in a fixed ratio ✓ Correct
D. always metals
Solution: A compound has elements chemically bonded in a fixed proportion, with properties different from its constituents.
Q3 — Element, Compound & Mixture · medium · theory
Which of the following is a compound?
A. Air
B. Water ✓ Correct
C. Brass
D. Sea water
Solution: Water (H₂O) is a compound; air, brass and sea water are mixtures.
Q4 — Element, Compound & Mixture · medium · theory
Air is classified as a:
A. compound
B. pure substance
C. mixture ✓ Correct
D. element
Solution: Air is a mixture of gases (nitrogen, oxygen, etc.) in variable proportions.
Q5 — Element, Compound & Mixture · hard · theory
When iron and sulphur are heated together to form iron sulphide, the product:
A. can be separated by a magnet
B. is a mixture
C. has properties different from both iron and sulphur ✓ Correct
D. still behaves like iron and sulphur separately
Solution: Iron sulphide is a compound whose properties differ from those of iron and sulphur (which can no longer be magnetically separated).
Q6 — Element, Compound & Mixture · medium · theory
The components of a mixture can be separated by:
A. physical methods ✓ Correct
B. no method at all
C. only chemical reactions
D. only electrolysis
Solution: Mixtures can be separated by physical means (filtration, evaporation, etc.); compounds need chemical methods.