08. REDOX REACTIONS
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Redox Reactions

18666 Reduction involves

1 Loss of electrons
2 Gain of electrons
3 Increase in the valency of positive part
4 Decrease in the valency of negative part
Redox Reactions

18667 In a reaction between zinc and iodine, in which zinc iodide is formed, what is being oxidised

1 Zinc ions
2 Iodide ions
3 Zinc atom
4 Iodine
Redox Reactions

18668 Which one of the following reactions does not involve either oxidation or reduction

1 \(VO_2^ + \, \to \,{V_2}{O_3}\)
2 \(Na\, \to \,N{a^ + }\)
3 \(CrO_4^{2 - }\, \to \,C{r_2}O_7^{2 - }\)
4 \(Z{n^{2 + }}\, \to \,Zn\)
Redox Reactions

18694 The strongest reducing agent is

1 \(HN{O_2}\)
2 \({H_2}S\)
3 \({H_2}S{O_3}\)
4 \(SnC{l_2}\)
Redox Reactions

18669 In the following reaction, \(3B{r_2} + 6CO_3^{2 - } + 3{H_2}O \rightarrow 5B{r^ - } + BrO_3^ - + 6HC{O_3}\)

1 Bromine is oxidised and carbonate is reduced
2 Bromine is reduced and water is oxidised
3 Bromine is neither reduced nor oxidised
4 Bromine is both reduced and oxidised
NEET DIGITAL LIBRARY
Redox Reactions

18666 Reduction involves

1 Loss of electrons
2 Gain of electrons
3 Increase in the valency of positive part
4 Decrease in the valency of negative part
Redox Reactions

18667 In a reaction between zinc and iodine, in which zinc iodide is formed, what is being oxidised

1 Zinc ions
2 Iodide ions
3 Zinc atom
4 Iodine
Redox Reactions

18668 Which one of the following reactions does not involve either oxidation or reduction

1 \(VO_2^ + \, \to \,{V_2}{O_3}\)
2 \(Na\, \to \,N{a^ + }\)
3 \(CrO_4^{2 - }\, \to \,C{r_2}O_7^{2 - }\)
4 \(Z{n^{2 + }}\, \to \,Zn\)
Redox Reactions

18694 The strongest reducing agent is

1 \(HN{O_2}\)
2 \({H_2}S\)
3 \({H_2}S{O_3}\)
4 \(SnC{l_2}\)
Redox Reactions

18669 In the following reaction, \(3B{r_2} + 6CO_3^{2 - } + 3{H_2}O \rightarrow 5B{r^ - } + BrO_3^ - + 6HC{O_3}\)

1 Bromine is oxidised and carbonate is reduced
2 Bromine is reduced and water is oxidised
3 Bromine is neither reduced nor oxidised
4 Bromine is both reduced and oxidised
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Redox Reactions

18666 Reduction involves

1 Loss of electrons
2 Gain of electrons
3 Increase in the valency of positive part
4 Decrease in the valency of negative part
Redox Reactions

18667 In a reaction between zinc and iodine, in which zinc iodide is formed, what is being oxidised

1 Zinc ions
2 Iodide ions
3 Zinc atom
4 Iodine
Redox Reactions

18668 Which one of the following reactions does not involve either oxidation or reduction

1 \(VO_2^ + \, \to \,{V_2}{O_3}\)
2 \(Na\, \to \,N{a^ + }\)
3 \(CrO_4^{2 - }\, \to \,C{r_2}O_7^{2 - }\)
4 \(Z{n^{2 + }}\, \to \,Zn\)
Redox Reactions

18694 The strongest reducing agent is

1 \(HN{O_2}\)
2 \({H_2}S\)
3 \({H_2}S{O_3}\)
4 \(SnC{l_2}\)
Redox Reactions

18669 In the following reaction, \(3B{r_2} + 6CO_3^{2 - } + 3{H_2}O \rightarrow 5B{r^ - } + BrO_3^ - + 6HC{O_3}\)

1 Bromine is oxidised and carbonate is reduced
2 Bromine is reduced and water is oxidised
3 Bromine is neither reduced nor oxidised
4 Bromine is both reduced and oxidised
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Redox Reactions

18666 Reduction involves

1 Loss of electrons
2 Gain of electrons
3 Increase in the valency of positive part
4 Decrease in the valency of negative part
Redox Reactions

18667 In a reaction between zinc and iodine, in which zinc iodide is formed, what is being oxidised

1 Zinc ions
2 Iodide ions
3 Zinc atom
4 Iodine
Redox Reactions

18668 Which one of the following reactions does not involve either oxidation or reduction

1 \(VO_2^ + \, \to \,{V_2}{O_3}\)
2 \(Na\, \to \,N{a^ + }\)
3 \(CrO_4^{2 - }\, \to \,C{r_2}O_7^{2 - }\)
4 \(Z{n^{2 + }}\, \to \,Zn\)
Redox Reactions

18694 The strongest reducing agent is

1 \(HN{O_2}\)
2 \({H_2}S\)
3 \({H_2}S{O_3}\)
4 \(SnC{l_2}\)
Redox Reactions

18669 In the following reaction, \(3B{r_2} + 6CO_3^{2 - } + 3{H_2}O \rightarrow 5B{r^ - } + BrO_3^ - + 6HC{O_3}\)

1 Bromine is oxidised and carbonate is reduced
2 Bromine is reduced and water is oxidised
3 Bromine is neither reduced nor oxidised
4 Bromine is both reduced and oxidised
NEET DIGITAL LIBRARY
Redox Reactions

18666 Reduction involves

1 Loss of electrons
2 Gain of electrons
3 Increase in the valency of positive part
4 Decrease in the valency of negative part
Redox Reactions

18667 In a reaction between zinc and iodine, in which zinc iodide is formed, what is being oxidised

1 Zinc ions
2 Iodide ions
3 Zinc atom
4 Iodine
Redox Reactions

18668 Which one of the following reactions does not involve either oxidation or reduction

1 \(VO_2^ + \, \to \,{V_2}{O_3}\)
2 \(Na\, \to \,N{a^ + }\)
3 \(CrO_4^{2 - }\, \to \,C{r_2}O_7^{2 - }\)
4 \(Z{n^{2 + }}\, \to \,Zn\)
Redox Reactions

18694 The strongest reducing agent is

1 \(HN{O_2}\)
2 \({H_2}S\)
3 \({H_2}S{O_3}\)
4 \(SnC{l_2}\)
Redox Reactions

18669 In the following reaction, \(3B{r_2} + 6CO_3^{2 - } + 3{H_2}O \rightarrow 5B{r^ - } + BrO_3^ - + 6HC{O_3}\)

1 Bromine is oxidised and carbonate is reduced
2 Bromine is reduced and water is oxidised
3 Bromine is neither reduced nor oxidised
4 Bromine is both reduced and oxidised