(a) Solvent
(b) Solute
(c) Solution
(d) Noneofthese
(d) None of these
Solution of sugar in water Chalk powder in water
Kerosene oil in water
True or False
Colloidal state is an intermediate state between suspension and true solution. A true solution is a heterogeneous mixture.
Very Short Answer Type
What is meant by a substance?
What is meant by saying that metals are malleable ?
CHEMISTRY
17. In sweetened tea, the sugar is
Short Answer Type
23. Differentiate between homogeneous and heterogeneous mixtures with examples (3)
24. How are sol, solution and suspension different from each other ? (3)
25.
OR
(a) What is meant by (i) elements (ii) compounds, and (iii) mixtures ?
Write down the names of two elements, two compounds and two mixtures. (3)
26. (X) Classify the following into elements ,compounds and mixtures. (a) Sodium (b) Soil (c) Sugar solution (d) Silver (e) Calcium carbonate (f) Tin (g) Silicon (h) Coal (i) Air (J) Soap (k) Methane (l) Carbon dioxide (m) Blood
(Y) What are (i) metals (ii) non-metals, and (iii) metalloids ? Give two examples each of metals, non-metals and metalloids.
OR
(5)
27. There is a large group of materials P which can be divided into three groups Q, R and S on the basis of their properties. The substances belonging to group Q can be solids, liquids or gases. The solids belonging to group Q are usually electrical insulators. Most of the substances of group R are solids which are good conductors of electricity. The substances belonging to group S are neither insulators like Q not good conductors like R. The properties of S are ntermediate between those of Q and R.
(a) What could the group of materials P be ?
(b) Name the substances Q. Give two examples of such substances. c) Name the substances R. Write two examples of such substances.
(d) Name the substances S. Give two examples of such substances. (e) Out of Q, R and S, which substances are malleable and ductile
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