Which of the following is not an Igneous Rock?
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Which among the following is used to generate light, to weld metals?
The element with the highest electron affinity among halogens is
Which of the following constitutes highest percentage of Green House gases?
What is the number of atoms in 46 g of sodium-23 (N = Avogadro constant)?
Which of the following is not a Halon gas ?
___ is amphoteric in nature.
The depletion in Ozone layer is caused by ___________ .
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