Page 2 - Home Assignment-3. Practical Worksheet

PTO

MCQs
1. In an experiment, the following substances are added to water. A true solution is
formed in
(a) I (b) II (c) III (d) IV

2. Identify the suspension in the following:
(a) soap in water(b) milk in water (c) alcohol in water (d) saw dust in water

You have prepared four different mixtures in water using (i)charcoal powder,(ii)
3. chalk powder, (iii) slaked lime,(iv)detergent powder.If you filter these mixtures
through a filter paper, there will be no residue left after filtration in the case of
(a) charcoal powder (b)chalk powder (c)slaked lime (d) detergent
powder

4. Which of the following is true for a mixture of (NH4)2CO3in water ?
Stability Transparency Filterability

(a) stable transparent no residue
(b) unstable opaque residue
(c) stable Transparent no residue
(d) stable translucent residue

5. To prepare a colloidal solution of starch, we should
(a) add starch powder to boiling water and then cool
(b) add starch powder to cold water and then boil
(c) heat starch powder, add it to cold water and then bring to boil
(d)add a thin plate of starch to boiling water while stirring.

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