(i) CaCO3​→CaO+CO2​

(ii) 4FeS2​+11O2​→2Fe2​O3​+8SO2​

(iii) 2Al(OH)3​→Al2​O3​+3H2​O

(iv) Cu2​S+2CuO→4Cu+SO2​

Correct Answers:

(i) CaCO3​→CaO+CO2​

(iii) 2Al(OH)3​→Al2​O3​+3H2​O

Explanation:

Reactions Involved in the Calcination process:-

CaCO3​→CaO+CO2​

2Al(OH)3​→Al2​O3​+3H2​O