20031
Saturated solution of \(KN{O_3}\) is used to make ‘salt-bridge’ because
1 Velocity of \({K^ + }\) is greater than that of \(NO_3^ - \)
2 Velocity of \(NO_3^ - \) is greater than that of \({K^ + }\)
3 Velocities of both \({K^ + }\)and \(NO_3^ - \) are nearly the same
4 \(KN{O_3}\)is highly soluble in water
Explanation:
(c)Velocities of both \({K^ + }\) and \(NO_3^ - \) are nearly the same in \(KN{O_3}\) so it is used to make salt-bridge.
ELECTROCHEMISTRY
20012
When lead storage battery is charged
1 \(Pb{O_2}\) is dissolved
2 \(PbS{O_4}\) is deposited on lead electrode
3 \({H_2}S{O_4}\) is regenerated
4 Lead is deposited on lead electrode
Explanation:
Net cell reaction during discharge:- \(P b_{(s)}+P b O_{2(s)}+2 H_{2} S O_{4(a q)} \rightarrow 2 P b S O_{4(s)}+2 H_{2} O_{(l)}\) \(\rightarrow\) During discharge, \(H_{2} S O_{4}\) is consumed and its density decreases. \(\rightarrow\) Fully charged cell gives a potential of about \(2 V\). When the cell potential reduces to about \(1.8 V\) it should be recharged. Net cell reaction during recharge:- \(2 P b S O_{4(s)}+2 H_{2} O_{(l)} \rightarrow P b_{(s)}+P b O_{2(s)}+2 H_{2} S O_{4(a q)}\) \(\rightarrow\) The concentration of \(H_{2} S O_{4}\) increases as it is generated.
ELECTROCHEMISTRY
20013
When lead storage battery is charged
1 Lead dioxide dissolves
2 Sulphuric acid is regenerated
3 The lead electrode becomes coated with lead sulphate
4 The amount of sulphuric acid decreases
Explanation:
(b)During charging of a lead storage battery, the reaction at the anode and cathode are Anode: \(PbS{O_4} + 2{e^ - } \to Pb + SO_4^{2 - }\) Cathode: \(PbS{O_4} + 2{H_2}O \to Pb{O_2} + 4{H^ + } + SO_4^{2 - } + 2{e^ - }\) In both the reactions \({H_2}S{O_4}\) is regenerated.
20031
Saturated solution of \(KN{O_3}\) is used to make ‘salt-bridge’ because
1 Velocity of \({K^ + }\) is greater than that of \(NO_3^ - \)
2 Velocity of \(NO_3^ - \) is greater than that of \({K^ + }\)
3 Velocities of both \({K^ + }\)and \(NO_3^ - \) are nearly the same
4 \(KN{O_3}\)is highly soluble in water
Explanation:
(c)Velocities of both \({K^ + }\) and \(NO_3^ - \) are nearly the same in \(KN{O_3}\) so it is used to make salt-bridge.
ELECTROCHEMISTRY
20012
When lead storage battery is charged
1 \(Pb{O_2}\) is dissolved
2 \(PbS{O_4}\) is deposited on lead electrode
3 \({H_2}S{O_4}\) is regenerated
4 Lead is deposited on lead electrode
Explanation:
Net cell reaction during discharge:- \(P b_{(s)}+P b O_{2(s)}+2 H_{2} S O_{4(a q)} \rightarrow 2 P b S O_{4(s)}+2 H_{2} O_{(l)}\) \(\rightarrow\) During discharge, \(H_{2} S O_{4}\) is consumed and its density decreases. \(\rightarrow\) Fully charged cell gives a potential of about \(2 V\). When the cell potential reduces to about \(1.8 V\) it should be recharged. Net cell reaction during recharge:- \(2 P b S O_{4(s)}+2 H_{2} O_{(l)} \rightarrow P b_{(s)}+P b O_{2(s)}+2 H_{2} S O_{4(a q)}\) \(\rightarrow\) The concentration of \(H_{2} S O_{4}\) increases as it is generated.
ELECTROCHEMISTRY
20013
When lead storage battery is charged
1 Lead dioxide dissolves
2 Sulphuric acid is regenerated
3 The lead electrode becomes coated with lead sulphate
4 The amount of sulphuric acid decreases
Explanation:
(b)During charging of a lead storage battery, the reaction at the anode and cathode are Anode: \(PbS{O_4} + 2{e^ - } \to Pb + SO_4^{2 - }\) Cathode: \(PbS{O_4} + 2{H_2}O \to Pb{O_2} + 4{H^ + } + SO_4^{2 - } + 2{e^ - }\) In both the reactions \({H_2}S{O_4}\) is regenerated.
20031
Saturated solution of \(KN{O_3}\) is used to make ‘salt-bridge’ because
1 Velocity of \({K^ + }\) is greater than that of \(NO_3^ - \)
2 Velocity of \(NO_3^ - \) is greater than that of \({K^ + }\)
3 Velocities of both \({K^ + }\)and \(NO_3^ - \) are nearly the same
4 \(KN{O_3}\)is highly soluble in water
Explanation:
(c)Velocities of both \({K^ + }\) and \(NO_3^ - \) are nearly the same in \(KN{O_3}\) so it is used to make salt-bridge.
ELECTROCHEMISTRY
20012
When lead storage battery is charged
1 \(Pb{O_2}\) is dissolved
2 \(PbS{O_4}\) is deposited on lead electrode
3 \({H_2}S{O_4}\) is regenerated
4 Lead is deposited on lead electrode
Explanation:
Net cell reaction during discharge:- \(P b_{(s)}+P b O_{2(s)}+2 H_{2} S O_{4(a q)} \rightarrow 2 P b S O_{4(s)}+2 H_{2} O_{(l)}\) \(\rightarrow\) During discharge, \(H_{2} S O_{4}\) is consumed and its density decreases. \(\rightarrow\) Fully charged cell gives a potential of about \(2 V\). When the cell potential reduces to about \(1.8 V\) it should be recharged. Net cell reaction during recharge:- \(2 P b S O_{4(s)}+2 H_{2} O_{(l)} \rightarrow P b_{(s)}+P b O_{2(s)}+2 H_{2} S O_{4(a q)}\) \(\rightarrow\) The concentration of \(H_{2} S O_{4}\) increases as it is generated.
ELECTROCHEMISTRY
20013
When lead storage battery is charged
1 Lead dioxide dissolves
2 Sulphuric acid is regenerated
3 The lead electrode becomes coated with lead sulphate
4 The amount of sulphuric acid decreases
Explanation:
(b)During charging of a lead storage battery, the reaction at the anode and cathode are Anode: \(PbS{O_4} + 2{e^ - } \to Pb + SO_4^{2 - }\) Cathode: \(PbS{O_4} + 2{H_2}O \to Pb{O_2} + 4{H^ + } + SO_4^{2 - } + 2{e^ - }\) In both the reactions \({H_2}S{O_4}\) is regenerated.
20031
Saturated solution of \(KN{O_3}\) is used to make ‘salt-bridge’ because
1 Velocity of \({K^ + }\) is greater than that of \(NO_3^ - \)
2 Velocity of \(NO_3^ - \) is greater than that of \({K^ + }\)
3 Velocities of both \({K^ + }\)and \(NO_3^ - \) are nearly the same
4 \(KN{O_3}\)is highly soluble in water
Explanation:
(c)Velocities of both \({K^ + }\) and \(NO_3^ - \) are nearly the same in \(KN{O_3}\) so it is used to make salt-bridge.
ELECTROCHEMISTRY
20012
When lead storage battery is charged
1 \(Pb{O_2}\) is dissolved
2 \(PbS{O_4}\) is deposited on lead electrode
3 \({H_2}S{O_4}\) is regenerated
4 Lead is deposited on lead electrode
Explanation:
Net cell reaction during discharge:- \(P b_{(s)}+P b O_{2(s)}+2 H_{2} S O_{4(a q)} \rightarrow 2 P b S O_{4(s)}+2 H_{2} O_{(l)}\) \(\rightarrow\) During discharge, \(H_{2} S O_{4}\) is consumed and its density decreases. \(\rightarrow\) Fully charged cell gives a potential of about \(2 V\). When the cell potential reduces to about \(1.8 V\) it should be recharged. Net cell reaction during recharge:- \(2 P b S O_{4(s)}+2 H_{2} O_{(l)} \rightarrow P b_{(s)}+P b O_{2(s)}+2 H_{2} S O_{4(a q)}\) \(\rightarrow\) The concentration of \(H_{2} S O_{4}\) increases as it is generated.
ELECTROCHEMISTRY
20013
When lead storage battery is charged
1 Lead dioxide dissolves
2 Sulphuric acid is regenerated
3 The lead electrode becomes coated with lead sulphate
4 The amount of sulphuric acid decreases
Explanation:
(b)During charging of a lead storage battery, the reaction at the anode and cathode are Anode: \(PbS{O_4} + 2{e^ - } \to Pb + SO_4^{2 - }\) Cathode: \(PbS{O_4} + 2{H_2}O \to Pb{O_2} + 4{H^ + } + SO_4^{2 - } + 2{e^ - }\) In both the reactions \({H_2}S{O_4}\) is regenerated.
