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

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

Question : Select the most appropriate option that can substitute the underlined segment in the given sentence.

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