Oxide of which of the following will turn red litmus blue?
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___________ gases absorb long wave (infrared) radiation from the earth and emit it again towards the earth.
Which among the following has highest electron affinity?
Who formulated ‘the atomic theory’ of a matter?
_____ is the most ductile metal.
The depletion in Ozone layer is caused by ___________ .
Which of the following elements has the lowest melting point?
Atomic Number of Hydrogen is _______.
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