Question : 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.
Option 1: reactant
Option 2: catalyst
Option 3: enzyme
Option 4: solute
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Correct Answer: catalyst
Solution : The second option is the correct answer.
The term "catalyst" is a general term for a substance that facilitates a chemical reaction without undergoing a permanent change, making it the most appropriate choice in this context.
The meanings of the other options are as follows:
Therefore, the sentence is: "Kidney beans were boiled quickly when Nisha added a catalyst."
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Question : In a reaction type of A + B → C + D, one could ensure to be a first-order reaction by:
Option 1: increasing the temperature
Option 2: increasing the concentration of a product
Option 3: increasing the concentration of a reactant
Option 4: adding a catalyst
Question : Select the most appropriate option that can substitute the underlined segment in the given sentence.
The flames caught so quick that I had no time to think.
Option 1: quickly
Option 2: quickest
Option 3: as quick as
Option 4: quicker
Question : Select the option that can be used as a one-word substitute for the underlined group of words. WHO is an organisation that raises money for a particular cause.
Option 1: donation
Option 2: volunteer
Option 3: charity
Option 4: fundraiser
Question : Select the option that can be used as a one-word substitute for the underlined group of words. Henny Penny is a story that is passed down from generation to generation through spoken word.
Option 1: folktale
Option 2: fable
Option 3: epic
Option 4: parable
In today's world, technology must be used for feed the changing forces in society.
Option 1: must had been used to feed
Option 2: must have been used to feed
Option 3: must used to feed
Option 4: must be used to feed
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