Home
Class 7
BIOLOGY
Statement (i) : The inorganic impurities...

Statement (i) : The inorganic impurities present in waste water are herbicides, pesticides, oil etc. Statement (ii) : The organic impurities are phosphates, metals, nitrates etc. Statement (iii) : There are no germs / bacteria present in waste water.

A

Statement (i) and (iii) are incorrect while (ii) is correct.

B

Statement (i) and (ii) are incorrect while (iii) is correct.

C

All statements are correct

D

All statements are incorrect

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • SPEED DISPERSAL

    VGS PUBLICATION-BRILLIANT|Exercise EXERCISE|55 Videos

  • WEATHER AND CLIMATE

    VGS PUBLICATION-BRILLIANT|Exercise EXERCISE|78 Videos

Similar Questions

Explore conceptually related problems

Statement (i) : Wood and plastic are heat conductors. Statement (ii) : Air is transparent. Statement (iii) : Sulphur and graphite does not dissolve in water.

Statement (i) : Glass, water and air are all transparent materials. Statement (ii) : Saw dust is soluble in water.

Statement (i) : Sugar does not dissolve in water. Statement (ii) : Oll and saw dust sinks in water. Statement (iii) : Oil and wax are mis-cible with water.

Statement (i) : Moringa seeds are dispersed by wind. Statement (ii) : Balsam seeds are dispersed by explosion. Statement (iii) : Coconut seeds are dispersed by water.

Statement (i) : Change of liquid water to steam, on boiling, is an irreversible change. Statement (ii) Beating of human heart is a non-periodic change.

Statement A: Chlorine kills harmful disease causing organisms present in waste water. Statement B: Aeration allows growth of microbes that break down wastes.

Statement (G) Observations of a data presented in bar graphs, pictographs, pie charts etc. Statement (H): The width of all bars are equal. Statement (I): The lengths of all bars are Need not to be equal in bar graphs.

Statement (i) : Water vapour is gaseous state of water. Statement (Ii): Water vapour in the clouds cools down and it becomes water again.

Statement(i): Living things possess growth, breathing, excretion, giving birth, response to stimulus etc. Statement (ii) : Non living things do not posses above characters.

Statement (i) : If the solid dissolve in liquid, then decantation process can be used to separate them. Statement (ii) : Oil and water solution can be separated by decantation.