RAHUL IS A SKILLED PAINTER .HE MIXED A WHITE COLOURED POWDER " X" WITH WATER. THE COMPOUND X REACTED VIGOROUSLY WITH WATER TO PRODUCE A COMPOUND Y AND A LARGE AMOUNT OF HEAT. RAHUL USED THIS COMPOUND Y FOR WHITEWASHING THE WALLS .AFTER 3 DAYS OF WHITEWASH THE WALLS BECAME SHINY. which reaction is formed
Answers
Answer:
Ca0 + H2O -> Ca(OH)2 + heat
Ca(OH)2 + CO2 -> CaCO3 + H2O
Explanation:
Calcium oxide reacts vigorously with water to produce Calcium Hydroxide (slaked lime) and releases a large amount of heat. This is used for whitewashing.
Calcium Hydroxide then reacts with carbon dioxide in the air to form Calcium Carbonate which gives a shiny finish to the wall.
Answer:
Coloured powder X is Calcium oxide, Y is Calcium hydroxide and Z is calcium carbonate.
Explanation:
Calcium oxide is a white powder used for the purpose of painting walls. It has a high affinity for water. Calcium oxide reacts vigorously with water to form Calcium hydroxide (CaOH)2 and heat is produced. This reaction is exothermic.
Ca0 + H2O -----> Ca(OH)2 + heat
Calcium hydroxide is also known as slake lime. When it is applied on walls, carbon dioxide present in the atmosphere reacts with it to form calcium carbonate. Calcium carbonate imparts shining to the walls.
Ca(OH)2 + CO2 -> CaCO3 + H2O
So, it is clear from the above discussion that the coloured powder X is Calcium oxide, Y is Calcium hydroxide and Z is calcium carbonate.