Select the most appropriate word to fill in the blank.

Methane stays in the atmosphere for less time than carbon, it's highly effective _______ trapping heat.

Question

Question

This question was previously asked in

MP Vyapam Group 4 (Assistant Grade-3/Stenographer) Official Paper (Held On: 15 July, 2023 Shift 2)

Answer 1

The correct answer is 'at'.

Key Points

The preposition "at" is used to indicate the effectiveness in executing or performing a particular action, which in this case is "trapping heat."
The sentence expresses how effective methane is specifically in the context of trapping heat, so "at" is the correct choice.
Options 1, 3, and 4 are grammatically incorrect in this context.

Therefore, the correct answer is Option 2.

Complete Sentence: "Methane stays in the atmosphere for less time than carbon, it's highly effective at trapping heat."

Additional Information

Option 1: "of" is incorrect because "effective of" is not the correct prepositional phrase.
Option 3: "for" is incorrect; "effective for" is used to indicate purpose or benefitting, which does not fit this context.
Option 4: "by" is incorrect because it does not fit grammatically with "effective" in this context.