............ element is represented by the given symbol.
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Which of the following is most important for absorption of heat radiated from the Sun as well as from the Earth?
Chemical formula for sulphurous acid is:
Which of the following elements has the lowest melting point?
What is dry ice?
Elements A, B and C occur as Dobereiners triads. If the atomic mass of A is 7 and that of C is 39, what will be the atomic mass of B?
Aromatic hydrocarbons contain at least _____ benzene like ring in their molecules.
Which one of the following nonmetals shows allotropy in the liquid state?
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