Which of the following is an incorrect statement?
- AMercury cell is a primary cell providing a constant potential.
- BIn electrolytic cell reduction occurs at anode and in galvanic cell oxidation takes place at anode.
- CGalvanised iron does not rust.
- DDuring recharging,lead storage cell works as electrolytic cell.
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The bond dissociation energy of $B-F$ in $BF_3$ is $646 \ kJ \ mol^{-1}$ whereas that of $C-F$ in $CF_4$ is $515 \ kJ \ mol^{-1}$. The correct reason for higher $B-F$ bond dissociation energy as compared to that of $C-F$ is
The magnetic flux near the axis and inside the air-core solenoid of length $60 \ cm$ carrying current $I$ is $1.57 \times 10^{-6} \ Wb$. Its magnetic moment will be (cross-sectional area of a solenoid is very small as compared to its length,$\mu_0 = 4\pi \times 10^{-7} \ SI \ units$). (in $A \ m^2$)
$A$ particle moves in a straight line with retardation proportional to its displacement. Its loss of kinetic energy for any displacement $x$ is proportional to
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Assertion : The isothermal curves intersect each other at a certain point.
Reason : The isothermal change takes place slowly,so,the isothermal curves have very little slope.
Reason : The isothermal change takes place slowly,so,the isothermal curves have very little slope.
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