Who was the first Indian astronomer to calculate the time taken by earth to orbit the sun?
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SMOG is a combination of
Which is the only train which runs between Kolkata and Dhaka?
In the following question, out of the four alternatives, select the word similar in meaning to the word given.
Procrastinate
In the following question, out of the four alternatives, select the word similar in meaning to the word given.Congregation
Removal of carbon particles from air involves the principle of
The modern periodic table consists of 18 groups and 7 periods. What is the atomic number of the element placed in the 2nd group and the 4th period?
Which of the following elements has the lowest melting point?
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