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What are carbohydrates? How monosaccharide’s at prepared? Give their characteristics.

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

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1 answer 273 views

What is refining of petroleum and how it is carried out?

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

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1 answer 314 views

How polarity of water molecule plays its role to dissolve the substances?

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

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What role is played by pine oil in the concentration process?

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

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Give the reaction of formation of ammonia in the process.

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

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Why a salt is neutral, explain with an example?

asked Sep 17, 2017 in Chemistry by shamroz (41.5k points)

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1 answer 489 views

Write the molecular, dot and cross and structural formula of ethyne.

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

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1 answer 692 views

How many water of crystallizations are present in CuSO4.5H2O and CaSO4.2H2O?

asked Sep 16, 2017 in Chemistry by sonia (36.5k points)

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Define chemical equilibrium state.

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

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1 answer 256 views

How crude oil is refined? Explain the important fractions of petroleum along with their usage.

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

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2 answers 653 views

Define and give the characteristics of a Lewis acid.

asked Sep 15, 2017 in Biology by shamroz (41.5k points)

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1 answer 607 views

Explain the Lewis concept of acids and bases.

asked Sep 17, 2017 in Chemistry by shamroz (41.5k points)

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1 answer 478 views

How is tetrabromoethane prepared from acetylene?

asked Sep 20, 2017 in Chemistry by sonia (36.5k points)

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1 answer 298 views

How pesticides cause water pollution?

asked Sep 24, 2017 in Chemistry by sonia (36.5k points)

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1 answer 467 views

Alkanes are a source of heat. Explain it.

asked Sep 21, 2017 in Chemistry by shamroz (41.5k points)

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1 answer 606 views

How many times a solution of pH I will be stronger than that of a solution having pH 2?

asked Sep 17, 2017 in Chemistry by shamroz (41.5k points)

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1 answer 427 views

What are the disadvantages of fat soluble vitamins?

asked Sep 21, 2017 in Chemistry by shamroz (41.5k points)

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At which positions, the P.E. of a simple pendulum has minimum and maximum values?

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

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Why water molecule is polar?

asked Sep 24, 2017 in Chemistry by sonia (36.5k points)

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What do you mean by atmosphere?

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

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