Question : Benzene cannot undergo:
Option 1: substitution
Option 2: addition
Option 3: elimination
Option 4: oxidation
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Correct Answer: elimination
Solution : The correct option is elimination.
Benzene is incapable of undergoing an elimination reaction. Benzene's carbon atoms are sp2 hybridised, which means they form a planar ring with alternating single, and double bonds. Because the double bonds are delocalized around the ring, benzene is extremely tough to break. Breaking a carbon-carbon bond is required for elimination processes, which is difficult in benzene. Furthermore, the delocalization of electrons in the double bonds makes any nucleophile attack on the benzene ring difficult. As a result, benzene resists elimination processes fairly well.
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Question : A radioactive substance does not undergo any change (in mass or charge) during
Option 1: gamma emission
Option 2: oxidation
Option 3: alpha emission
Option 4: beta emission
Question : The reaction between an acid and a base is known as _________.
Option 1: condensation reaction
Option 2: substitution reaction
Option 3: oxidation reaction
Option 4: neutralisation reaction
Question : Biogas is formed through:
Option 1: fermentation
Option 3: aerobic respiration
Option 4: reduction
Question : Copper is refined by
Option 1: Roasting
Option 2: Oxidation
Option 3: Electrolysis
Option 4: Zone refining
Question : Fraternity means_______.
Option 1: Spirit of brotherhood
Option 2: Fatherly treatment
Option 3: Unity and integrity
Option 4: Elimination of economic justice
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