Chemistry Past Questions and Answers

When an atom gains an electron, it becomes properties

The alkali metals exhibit similar chemical properties because

What is the likely formula of compound formed between element M in group two and element X in group seven?

''Equal volumes of all gases at the same temperature and pressure contain the same number of molecules'' is an expression of

What volume of carbon (lV) oxide is produced at s.t.p. when 2.5g of CaCO₃ reacts with excess acid according to the following equation? CaCO₃ + 2HCI → CaCI2 +H₂O + CO₂ [CaCO₃ = 100; molar volume of a gas at s.t.p = 22.4dm³]