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Get Answers to all your Questions
What happens when (Write the balanced equation involved) –
(i) Copper is heated in air ?
(ii) Aluminium oxide is reacted with hydrochloric acid ?
(iii) Potassium reacts with water ?
(iv) Cinnabar is heated in air ?
(v) Aluminium oxide reacts with sodium hydroxide ?
Answers (1)
Balanced equation-
(i) Copper is heated in air,
2Cu + O2 ----> 2CuO
(ii) Aluminium oxide is reacted with hydrochloric acid,
Al2O3 + 6HCl ----> 2AlCl3 + 3H2O
(iii) Potassium reacts with water
2K + 2H2O -----> 2KOH + H2
(iv) Cinnabar is heated in air,
2HgS + 3O2 ---> 2HgO + 2SO2
(v) Aluminium oxide reacts with sodium hydroxide,
AI2O3 + 2NaOH -----> 2NaAlO2 + H2O
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