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Pollution of Air and Water — Science STD 8 — Question

Gujarat BoardEnglish MediumSTD 8SciencePollution of Air and Water4 Marks
Question
The table shows the properties of four water samples.
Water Sample Smell Colour
Sample $1$ No smell Slightly muddy
Sample $2$ Strong bad smell Muddy and greenish
Sample $3$ Very light smell Colourless
Sample $4$ No smell Colourless
$6$. Which water sample is likely to be least polluted$?$
$A.$ Sample $1$
$B.$ Sample $2$
$C$. Sample $ 3$
$D$. Sample $4$
$7.$ In which water source will the survival of aquatic animals be the most dificult$?$
$A.$ Source of Sample $1$
$B.$ Source of Sample $2$
$C.$ Source of Sample $3$
$D.$ Source of Sample $4$
✓

Answer

$6. D.$ Sample $4$
$7. B.$ Source of Sample $2$

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