Question

A BROWN COLOUR SOLID 'X' WHEN MIXED WITH ANOTHER SOLID 'Y'. DOESN'T REACT AT NORMAL TEMPERATURE. WHEN THIS MIXTURE IS IGNITED WITH BURNING Mg RIBBON, REACTION TAKES PLACE WHICH GIVES TWO PRODUCTS 'A' ,'B' .'A' IS A METAL AND SETTLE DOWN IN MOLTEN STATE AT THE BOTTOM WHILE 'B' IS A COMPOUND WHICH FLOATS OVER 'A' .THE REACTION IS EXOTHERMIC. WHAT ARE 'X' ,'Y','A' and 'B'. NAME The ABOVE REACTION.

Answer 1

X is ferric oxide Fe2O3 Y is aluminium Al A is iron Fe B is aluminium oxide Al2O3 And the reaction is called thermite reaction. It is commonly used for welding railway tracks.