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The electron configuration of \(_{22}X^{2+}\) ion is
Which of the following statement is correct about the periodic table?
The fundamental difference between the three states of matter is the
The partial pressure of oxygen in a sample of air is 452 mm Hg and the total pressure is 780 mm Hg. What is the mole fraction of oxygen?
How many moles of HCl will be required to react with potassium heptaoxodichromate (VI) to produce 3 moles of chlorine?
Which of the following compounds is composed of Al, Si, O and H?
Sieving is a technique used to separate mixture containing solid particles of
A mixture of iodine and sulphur crystals can be separated by treatment with?