_________ is a natural electrical phenomenon characterized by the appearance of streamers of reddish or greenish light in the sky, especially near the northern or southern magnetic pole.
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Calculate the frequency (in Hz) of a sound wave of wavelength 5 m travelling with a speed of 360 m/s.
How many members of upper house (Rajya Sabha) can be nominated by President of India?
Which country has the most coal reserves?
How many agreements have been signed by India and Israel on January 15, 2018?
Who among the following was the first to make use of artillery in warfare in medieval India?
Which of the forts was called the 'Troy of the East' by the British ?
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