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Which petroleum fraction is used in dry cleaning?

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What is the difference between crude oil and residual oil?

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Write down the names of four fractions obtained by the fractional distillation of residual oil.

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Describe the formation of petroleum.

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How ammonia is recovered in the Solvay's process?

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What happens when ammonical brine is carbonated?

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What is the principle of Solvay's process?

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What are advantages of Solvay's process?

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Explain process of electro refining.

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How roasting is carried out?

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Name the various metallurgical steps.

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

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What do you mean by a fraction of petroleum?

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In how many fractions crude oil is separated?

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What is principle of fractional distillation?

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