Mixtures & Solutions — Homi Bhabha Class 6 Chemistry MCQs with Solutions
Free Homi Bhabha Class 6 Chemistry Mixtures & Solutions MCQs with step-by-step solutions (10 questions). Part of Substances & Their Composition. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Mixtures & Solutions · easy · theory
A mixture in which the substances are completely mixed and look the same throughout is called a ______.
A. compound
B. suspension
C. solution ✓ Correct
D. element
Solution: A solution is a mixture that is uniform (the same) throughout, like sugar fully dissolved in water.
Q2 — Mixtures & Solutions · easy · theory
When you dissolve sugar in water, the sugar is the ______.
A. solution
B. gas
C. solvent
D. solute ✓ Correct
Solution: The substance that dissolves is called the solute, so here the sugar is the solute and the water is the solvent.
Q3 — Mixtures & Solutions · easy · theory
In a salt solution, water is the ______.
A. element
B. solute
C. precipitate
D. solvent ✓ Correct
Solution: The liquid that does the dissolving is the solvent. Water dissolves the salt, so water is the solvent.
Q4 — Mixtures & Solutions · easy · theory
Which of these is a mixture?
A. Pure gold
B. Air ✓ Correct
C. Oxygen
D. Distilled water
Solution: Air is a mixture of several gases such as nitrogen and oxygen. The others are pure substances.
Q5 — Mixtures & Solutions · medium · theory
Which of the following is a solution?
A. Sand mixed in water
B. Salt dissolved in water ✓ Correct
C. Chalk powder in water
D. Oil floating on water
Solution: Salt dissolves fully in water to give a clear, uniform solution. Sand, oil and chalk do not dissolve, so those are not solutions.
Q6 — Mixtures & Solutions · medium · theory
A mixture is different from a compound because a mixture ______.
A. can never be separated at all
B. forms a brand new substance
C. can be separated by physical methods like filtering or evaporation ✓ Correct
D. has a fixed ratio of its parts
Solution: The parts of a mixture are only physically mixed, so they can be separated by simple methods. A compound needs a chemical change to break apart.
Q7 — Mixtures & Solutions · medium · numerical
A solution is made by dissolving 20 g of sugar in 100 g of water. What is the total mass of the solution?
A. 80 g
B. 20 g
C. 120 g ✓ Correct
D. 100 g
Solution: Mass is not lost when things mix. Total mass = mass of solute + mass of solvent = 20 g + 100 g = 120 g.
Q8 — Mixtures & Solutions · medium · numerical
Meena stirs 5 g of salt into 95 g of water until it fully dissolves. The total mass of her salt solution is ______.
A. 5 g
B. 90 g
C. 100 g ✓ Correct
D. 95 g
Solution: The salt does not disappear, it just dissolves. Total mass = 5 g + 95 g = 100 g.
Q9 — Mixtures & Solutions · hard · theory
Which method would you use to get pure salt back from salt water?
A. Use a magnet
B. Evaporate the water ✓ Correct
C. Filter the solution
D. Add more water
Solution: The salt is dissolved, so a filter will not stop it. Heating the water makes it evaporate and leaves the solid salt behind.
Q10 — Mixtures & Solutions · hard · theory
A homogeneous mixture looks the same throughout, while a heterogeneous mixture does not. Which of these is a heterogeneous mixture?
A. A bowl of vegetable salad ✓ Correct
B. Sugar dissolved in tea
C. Salt water
D. Air
Solution: In a vegetable salad you can clearly see the different pieces, so it is heterogeneous. The others look the same throughout, so they are homogeneous.