Which one of the following reactions is a redox reaction? (a) C u S O 4 + 4 N H 3 → C u ( N H 3 ) 4 ] S O 4 (b) N a 2 S O 4 + B a C l 2 → B a S O 4 + 2 N a C l (c) S O 2 + H 2 O → H 2 S O 3 (d) 2 C u S O 4 + 4 K I → C u 2 I 2 + 2 K 2 S O 4 + I 2 .

Question

Which one of the following reactions is a redox reaction?
(a) CuSO4+4NH3→Cu(NH3)4]SO4
(b) Na2SO4+BaCl2→BaSO4+2NaCl
(c) SO2+H2O→H2SO3
(d) 2CuSO4+4KI→Cu2I2+2K2SO4+I2.

Vikas TU · Answer

Dear student In Option D Oxidation number of Cu decreases from +2 to +1 and oxidation number of iodine increases from −1 to 0. So, D is Cortrect Choice.

ankit singh · Answer

The reaction in which change in oxidation numbers of some of the atoms takes place is termed as a redox reaction. (a) C u S O 4 ​ + 2 + 6 − 2 ​ + 4 N H 3 ​ − 3 + 1 ​ → [ C u + 2 ( N − 3 H 3 ​ + 1 ​ ) 4 ​ ] S + 6 O 4 ​ − 2 ​ No change in oxidation number of any of the atoms. (b) N a 2 ​ + 1 ​ S + 6 O 4 ​ − 2 ​ + B a + 2 C l 2 ​ − 1 ​ → B a + 2 S + 6 O 4 ​ − 2 ​ + 2 N a + 1 Cl − 1 No change in oxidation number of any one of the atoms. (c) S + 4 O 2 ​ − 2 ​ + H 2 ​ + 1 ​ O − 2 → H 2 ​ + 1 ​ S + 4 O 3 ​ − 2 ​ No change in oxidation number of any one of the atoms. (d) 2 C u + 2 S + 6 O 4 ​ − 2 ​ + 4 K + 1 I − 1 → C u 2 ​ + 1 ​ I 2 ​ − 1 ​ + 2 K 2 ​ + 1 ​ S + 6 O 4 ​ − 2 ​ + I 2 ​ 0 ​ . Oxidation number of C u decreases from + 2 to + 1 and oxidation number of iodine increases from − 1 to 0 . Thus, out of the above four reactions, the reaction (d) is a redox reaction.

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Which one of the following reactions is a redox reaction? (a) C u S O 4 + 4 N H 3 → C u ( N H 3 ) 4 ] S O 4 (b) N a 2 S O 4 + B a C l 2 → B a S O 4 + 2 N a C l (c) S O 2 + H 2 O → H 2 S O 3 (d) 2 C u S O 4 + 4 K I → C u 2 I 2 + 2 K 2 S O 4 + I 2 .

Which one of the following reactions is a redox reaction?
(a) CuSO4+4NH3→Cu(NH3)4]SO4
(b) Na2SO4+BaCl2→BaSO4+2NaCl
(c) SO2+H2O→H2SO3
(d) 2CuSO4+4KI→Cu2I2+2K2SO4+I2.

Which one of the following reactions is a redox reaction?
(a) CuSO4+4NH3→Cu(NH3)4]SO4
(b) Na2SO4+BaCl2→BaSO4+2NaCl
(c) SO2+H2O→H2SO3
(d) 2CuSO4+4KI→Cu2I2+2K2SO4+I2.

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Which one of the following reactions is a redox reaction?(a) CuSO4​+4NH3​→Cu(NH3​)4​]SO4​(b) Na2​SO4​+BaCl2​→BaSO4​+2NaCl(c) SO2​+H2​O→H2​SO3​(d) 2CuSO4​+4KI→Cu2​I2​+2K2​SO4​+I2​.

Which one of the following reactions is a redox reaction?(a) CuSO4​+4NH3​→Cu(NH3​)4​]SO4​(b) Na2​SO4​+BaCl2​→BaSO4​+2NaCl(c) SO2​+H2​O→H2​SO3​(d) 2CuSO4​+4KI→Cu2​I2​+2K2​SO4​+I2​.

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Which one of the following reactions is a redox reaction?
(a) CuSO4+4NH3→Cu(NH3)4]SO4
(b) Na2SO4+BaCl2→BaSO4+2NaCl
(c) SO2+H2O→H2SO3
(d) 2CuSO4+4KI→Cu2I2+2K2SO4+I2.

Which one of the following reactions is a redox reaction?
(a) CuSO4+4NH3→Cu(NH3)4]SO4
(b) Na2SO4+BaCl2→BaSO4+2NaCl
(c) SO2+H2O→H2SO3
(d) 2CuSO4+4KI→Cu2I2+2K2SO4+I2.