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Chemistry Past Questions and Answers

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Chemistry Questions

Question 466:

Which of the following is NOT correct test for the named organic compound in each case?

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A Butanoic acid solution gives effervescence with Na<sub style='font-size: smaller;'>2</sub>CO<sub style='font-size: smaller;'>3</sub> solution
B Glucose when reacted with Na<sub style='font-size: smaller;'>2</sub>CrO<sub style='font-size: smaller;'>4</sub> at 0°C will show immediate discharge of colour
C When but-2-ene is reacted with dilute solution of KMnO<sub style='font-size: smaller;'>4</sub> the purple colour of KMnO is discharged readily even room temperature
D When butan-2-ol is boiled with butanoic acid with a drop of concentrated H<sub style='font-size: smaller;'>2</sub>SO<sub style='font-size: smaller;'>4</sub> a sweet smelling liquid is produced

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Question 467:

Which of the following is used as an 'anti-knock' in automobile engines?

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A Tetramethyl silane
B Lead tetra-ethyl
C Glycerol
D N-heptane

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Question 468:

What reaction takes place when palm-oil is added to potash and foam are observed?

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A Neutralization
B Saponification
C Esterification
D Salting-out

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Question 469:

When ethanol is heated with excess concentrated sulphuric acid, the ethanol is?

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A Oxidized to ethene
B Polymerized to polyethene
C Dehydrated to ethene
D Dehydrated to ethyne

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Question 470:

Which of the following compounds is NOT formed by the action of chlorine on methane?

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A CH<sub style='font-size: smaller;'>3</sub>CI
B C<sub style='font-size: smaller;'>2</sub>H<sub style='font-size: smaller;'>5</sub>CI
C CH<sub style='font-size: smaller;'>2</sub>CI<sub style='font-size: smaller;'>2</sub>
D CHCI<sub style='font-size: smaller;'>3</sub>

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