___________ gases absorb long wave (infrared) radiation from the earth and emit it again towards the earth.
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_______________ of a material is defined as the minimum amount of the work necessary to remove a free electron from the surface of the material.
Atomic number of which of the following elements is greater than that of Copper?
Anions are formed by _____.
Magnesium oxide (MgO) + Water (H2O) = ?
Cinnabar is an ore/mineral of
___________ is obtained by evaporation of sea.
Which of the following is a commercial source of energy?
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