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(a). Liquid ammonia has alkaline properties. When it reacts with Group 2 element A, the reaction will produce product B. However, product B is unstable and slowly decomposes to compound C with the release of NH3 and gas D as by-products. Combustion of element A will give a crimson color of flame. Predict the identities of A,B,C, and D. (4 marks) (b). When Group 1 element E is exposed to oxygen in a reaction, product F will be formed. Product F can be reacted with water to produce only metal hydroxide. However, in a controlled manner, the reaction of product F in water also can produce metal hydroxide and by-product G. (i). Predict the identities of E,F, and G by providing the equations for each reaction described. (ii). Give THREE (3) uses of element F. (iii). Compare the reactivity of element E with other elements in Group 1. (11 marks)