Elements P, Q, R, S have 6, 11, 15, 17 electrons respectively, therefore,
An element X forms the following compounds with chlorine; XCl4, XCl3, XCl2. This illustrates the
The oxidation state of chlorine in potassium chlorate is?
When air which contains the gases Oxygen, nitrogen, carbondioxide, water vapour and the rare gases, is passed through alkaline pyrogallol and then over quicklime, the only gases left are?
