Which of the following elements replaced eka-Aluminium in Mendeleev's Periodic table?
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The smell that we get when LPG cylinder leaks is due to the presence of
What is an endothermic reaction?
Which of the following metals is the most Malleable?
___ is the transition of a substance directly from the solid to the gas phase without passing through the intermediate liquid phase.
Atomic numbers of four elements are as follows : F(9), P(15), Cl(17), Ar(18). Which of the following two elements would be chemically similar?
Which of the following is NOT correctly matched?
Aqueous solution of copper sulphate?