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Why pesticides are used?

asked Sep 25, 2017 in Chemistry by shamroz (41.5k points)

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How lime stone dissolves in water?

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Give the general formula of the lipids.

asked Sep 22, 2017 in Biology by sonia (36.5k points)

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H3PO4 is a weak acid but its salt (Na3Po4) with strong base NaOH is neutral Explain it.

asked Sep 17, 2017 in Chemistry by sonia (36.5k points)

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What is water pollution? Describe the effects of using polluted water.

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Give a test used to identify unsaturation of an organic compound.

asked Sep 20, 2017 in Chemistry by shamroz (41.5k points)

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What is hepatitis?

asked Sep 24, 2017 in Chemistry by shamroz (41.5k points)

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How sodium zeolite softens water?

asked Sep 24, 2017 in Chemistry by shamroz (41.5k points)

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Explain the reasons for considering water a universal solvent.

asked Sep 25, 2017 in Chemistry by sonia (36.5k points)

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Give the importance of vitamins.

asked Sep 22, 2017 in Chemistry by sonia (36.5k points)

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What is difference between biodegradable and non-biodegradable substances?

asked Sep 25, 2017 in Chemistry by shamroz (41.5k points)

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In how many fractions crude oil is separated?

asked Sep 26, 2017 in Chemistry by shamroz (41.5k points)

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Write a note in detail on smelting and bessemerization, giving a specific example'

asked Sep 26, 2017 in Chemistry by sonia (36.5k points)

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Explain agricultural effluents are fatal for aquatic I life.

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Why organic compounds are numerous?

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Give a use of kerosene oil.

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Differentiate between homocyclic and heterocyclic compounds.

asked Sep 18, 2017 in Chemistry by shamroz (41.5k points)

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How Plants synthesize carbohydrates?

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Explain five important waterborne diseases. How can these be prevented?

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Relate the contribution of Ibn-al-Haitham and Ali-lbn-lsa.

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