1 (a) Two reagents that can be used to prepare chlorine gas are manganese (IV) oxide and concentrated hydrochloric acid. Write an equation for the reaction. Give the formula of another reagent that can be reacted with concentrated hydrochloric acid to produce chlorine gas. (1 mark) (iii) Describe how the chlorine gas could be dried in the laboratory. (2 marks) (b) In an experiment, dry chlorine gas was reacted with aluminium as shown in figure 1. (i) (ii) (iv) Aluminium Combustion tube Dry chlorine gas Heat Calcium oxide Figure 1 (iii) 0.84 g of aluminium reacted completely with chlorine gas. Calculate volume of chlorine gas used' (Molar gas volume is 24dm, Al = 27). Name substance A. (1 mark) Write an equation for the reaction that took place in the combustion tube. (1 mark) (1 mark) Give two reasons why calcium oxide is used in the set up. the (3 marks) (2 marks)