Questions

Dull means not sharp, not shining, not bright, ...

Hence, the given words are all that means the opposite of dull.

High frequency sound attacks the tympanic memberane and makes it defective. 120 decibles is too high a pitch to be heard and therefore it impairs the hearing ability.

Prime Minister Narendra Modi has launched a survey on the NaMo App, asking people to rate the performance of the government at the Centre and MPs and MLAs in their constituencies. He launched the initiative, to mark the completion of four years of the NDA government, which came to power at the Centre in 2014.

In computing, memory refers to the computer hardware integrated circuits that store information for immediate use in a computer.

Most semiconductor memory is organized into memory cells or bistable flip-flops, each storing one bit (0 or 1).

 Capital of Kazakhsthan is Astana

In computing, ".bak" is a filename extension commonly used to signify a backup copy of a file.