Chemistry-
General
Easy
Question
A standard hydrogen electrode has zero electrode potential because:
- hydrogen is easiest to oxidize
- this electrode potential is assumed to be zero
- hydrogen atom has only one electron
- hydrogen is the lightest element
The correct answer is: this electrode potential is assumed to be zero
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Given that 
and 
respectively. Therefore value of 
is :
Given that and respectively. Therefore value of is :
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at 298 K. The pressure of H2(g) would be –
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Two half cells have reduction potentials –0.76 V and – 0.13 V respectively. A galvanic cell is made from these two half cells. Which of the following statements is correct?
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Given that Eº values of Ag+/Ag, K+/ K, Mg2+/ Mg and Cr3+/ Cr are 0.80V, –2.93V, –2.37V and –0.74V respectively. Therefore, the order for the reducing power of the metal is -
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The standard potentials at 298 K for the following half reactions are as given
Which of the following is the strongest reducing agent?
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Which of the following is the strongest reducing agent?
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In which of the following is the cell the overall cell reaction is: 
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In which of the following electrochemical cell overall cell reaction is : 
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In which of the following cells net cell reaction is: 
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A lead shot of diameter 1mm falls through a long column of glycerin The variation of the velocity ‘v’ with distance covered (s) is represented by
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Physics-General
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The graph shows the change ' 
' in the length of a thin uniform wire used by the application of force ‘F’ at different temperatures T1 and T2 The variation suggests that
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The load versus extension graph for four wires of same material is shown. The thinnest wire is represented by the line
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In given figure, a wire loop has been bent so that it has three segments: segment ab (a quarter circle), bc (a square corner), and ca (straight). Here are three choices for a magnetic field through the loop:
Where 
is in milliteslas and t is in seconds. If the induced current in the loop due to 
and 
are 
respectively then
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Where is in milliteslas and t is in seconds. If the induced current in the loop due to and are respectively then
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Two parallel plates of infinite dimensions are uniformly charged. The surface charge density on one is 
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,field intensity at point C will be-
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A hemisphere (radius R) is placed in electric field as shown in fig. Total outgoing flux is -
A hemisphere (radius R) is placed in electric field as shown in fig. Total outgoing flux is -
Physics-General
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A plank with a uniform sphere placed on it, rests on a smooth horizontal plane. Plank is pulled to right by a constant force F. If the sphere does not slip over the plank.
A plank with a uniform sphere placed on it, rests on a smooth horizontal plane. Plank is pulled to right by a constant force F. If the sphere does not slip over the plank.
Physics-General
