General Knowledge Questions

A radio-active substance has a half life of six months. Three-fourth of the substance will decay in ______.

Research designed to evaluate theories is called

In the following question, four words are given out of which one word is correctly spelt. Select the correctly spelt word.

In the following question, out of the four alternatives, select the alternative which will improve the bracketed part of the sentence. In case no improvement is needed, select "no improvement".

The news (had appeared) irrelevant at that time, but now it directly affects us.

In the following question, out of the four alternatives, select the alternative which is the best substitute of the words/sentence.

A long, angry speech of criticism or accusation

A passage is given with 5 questions following it. Read the passage carefully and choose the best answer to each question out of the four alternatives.

The quest to find life outside the solar system got a big boost with the discovery of seven Earth-size extra-solar planets, or exoplanets, orbiting a dwarf star about 40 light years away. Unlike earlier discoveries of exoplanets, all seven planets could possibly have liquid water — a key to life as we know it on Earth — with three planets having the greatest chance. This is by far the largest collection of Earth-like planets in the habitable 'Goldilocks' zone of a star — neither too close nor too far from a star, which raises the possibility of liquid water being present on the surface. Only Earth has liquid water in the solar system. Since the dwarf star is much cooler than the Sun, the dimming of light each time a planet passes or transits before the star could be easily recorded from Earth unlike in cases when planets transit a Sun-like bright star. Since the initial discovery of three planets was made using the Chile-based Transiting Planets and Planetesimals Small Telescope, the exoplanet system is called TRAPPIST-1.

What is the 'Goldilocks' zone?

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

Chanakya was the chief advisor of _______.