Gum formation in stored gasoline is mainly due to the (A) Alkylation of unsaturated (B) Presence of sulphur (C) Oxidation & polymerisation of unsaturated (D) Higher aromatic content

Gum formation in stored gasoline is mainly due to the
(A) Alkylation of unsaturated
(B) Presence of sulphur
(C) Oxidation & polymerisation of unsaturated
(D) Higher aromatic content
by

1 Answer

Answer :

(B) Presence of sulphur
by

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Description : Presence of sulphur in gasoline (A) Leads to corrosion (B) Increases lead susceptibility (C) Decreases gum formation (D) Helps during stabilisatio

Last Answer : (A) Leads to corrosion

In catalytic cracking, the (A) Gasoline obtained has a very low octane number (B) Pressure & temperature is very high (C) Gasoline obtained has very high aromatic content (D) Gasoline obtained has very high amount of gum forming compounds

Description : In catalytic cracking, the (A) Gasoline obtained has a very low octane number (B) Pressure & temperature is very high (C) Gasoline obtained has very high aromatic content (D) Gasoline obtained has very high amount of gum forming compounds

Last Answer : (C) Gasoline obtained has very high aromatic content

Though increased pressure has a retarding effect on cracking reaction, yet in actual process, a positive pressure of 10-15 kgf/cm2 is maintained during cracking mainly to (A) Increase the yield of light distillates (B) Suppress coke formation (C) Enhance the octane number of gasoline (D) Reduce gum content in gasoline

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Last Answer : (B) Suppress coke formation

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Last Answer : (A) Reforming

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Last Answer : (C) All the alkylation processes use very high temperature (> 1000°C)

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Last Answer : (A) Shallow and small piles

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Sulphuric acid is used as a catalyst in the (A) Hydrogenation of oils (B) Gas phase oxidation of SO2 in chamber process (C) Alkylation of hydrocarbons(D) None of these

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Last Answer : (D) Lack of thorough mixing of fuel with air

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Fatty acids are (a) Unsaturated dicarboxylic acids (b) Long-chain alkanoic acids (c) Aromatic carboxylic acids (d) Aromatic dicarboxylic acids

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In producer gas making furnace, steam is added along with air to mainly control the (A) Fusion of coal ash & clinker formation (B) C. V. of producer gas (C) Temperature of producer gas (D) Tar content in producer gas

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Description : Which of the following methods can be used to increase the octane rating of gasoline? (a) Adding branched-chain alkanes (b) Adding tetraethyllead (c) Adding aromatic hydrocarbons (d) All of these

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Assam (India) coals suffers mainly from the disadvantage of high __________ content. (A) Ash (B) Volatile matter (C) Sulphur (4-6%)

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Last Answer : (B) Martensite formation

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