Questions

An element A forms an oxide with formula A3O4. What is the valency of element A?

Which one among the following components is used as an amplifying device?

The SI unit of intensity of sound is ______.

Mohan, having a mass of 40 kg, runs up a staircase of 50 steps in 10 s. If the height of each step is 15 cm, then what is his power?

Leeuwenhoek discovered the free living cells for the first time in ______.

In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives.

The battle between attackers and the attacked is becoming still more _____________. Faced with potentially new cyber ____________, the danger to India’s economic and national security is going _________________ geometrical progression. To be forearmed, with _______________ offensive cyber operations and __________________ cyber security, is essential.

__________________ cyber security, is essential.

In the following question, out of the four alternatives, select the alternative which best expresses the meaning of the idiom/phrase.

once in a blue moon

Select the word with the correct spelling.