Extraction of a metal (M) from its sulfide ore (M_2S) involves the following chemical reactions : 2 {M}_{2} {S}+3 {O}_{2} \stackrel{\text{heat }{────▸}} 2 {M}_{2} {O}+2 {SO}_{2} \↑ {M}_{2} {S}+2 {M}_{2} {O} \stackrel{\heat }{────▸} 6 {M}+{SO}_{2} \↑ The metal (M) may be

WBJEE 2021 Physics and Chemistry Solved Paper

CHEMISTRY

CATEGORY - I (Q41 to Q70)

Carry 1 mark each and only one option is correct. In case of incorrect answer or any combination of more than one answer, ¼ mark will be deducted.

Question : 58 of 80

Marks: +1, -0

Extraction of a metal (M) from its sulfide ore (M2S) involves the following chemical reactions :
2M2S+3O2

heat

────▸

2M2O+2SO2↑
M2S+2M2O

heat

────▸

6M+SO2↑
The metal (M) may be

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