Select the option that can be used as a one-word substitute for the underlined group of words.
Kidney beans were boiled quickly when Nisha added a substance that speeds up a chemical reaction without being consumed by the reaction itself.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. catalyst.
Correct Word: Catalyst
Meaning: A catalyst is a substance that speeds up a chemical reaction without being consumed or changed by the reaction.
Example: The enzyme acted as a catalyst in the biochemical reaction.
Meaning of the other words:
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Reactant – a substance that participates in and is changed by a chemical reaction.
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Enzyme – a biological catalyst, a protein that speeds up biochemical reactions. (Specific type of catalyst)
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Solute – a substance dissolved in another substance (solvent).
Final Sentence: Kidney beans were boiled quickly when Nisha added a catalyst.
Hence, the chosen option will be correct.