Per NCERT, what defines a COLLOID?
AA heterogeneous mixture where particles are LARGER than in a true solution but SMALL enough not to settle quickly — they remain suspended (e.g. milk, fog)
BA true solution like salt water
CA pure element
DA solid mixture of two metals
Answer & Solution
Correct answer: A. A heterogeneous mixture where particles are LARGER than in a true solution but SMALL enough not to settle quickly — they remain suspended (e.g. milk, fog)
Per NCERT §5.4.4, colloids have intermediate particle sizes — bigger than solutions but small enough to stay suspended.
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