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Number of electrons present in 3.6mg of NH4+ are
How many photons of light of 7000A°wavelenght are equivalent to 1J of energy..... read more
Posted on July 16, 2018 2 Comments 1 Replies
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answer is incorrect..... read more
Posted on May 24, 2018 1 Comments 0 Replies
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Maybe this ans is wrong in solution...... read more
Posted on April 22, 2018 1 Comments 1 Replies
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Posted on April 06, 2018 1 Comments 1 Replies
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Posted on April 02, 2018 1 Comments 1 Replies
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For a cell given below Ag|Ag+ || Cu+2|Cu Ag+ + e  Eo = x Cu+2 + 2e  Eo = y Eo cell is
But Ag has change of 1 electron and in order to balance 2 electrons must be there so answer should be y-2x...... read more
Posted on April 02, 2018 1 Comments 1 Replies
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Let f(x) = x1 2 t2 dt. Then the real roots of the equation x2  f (x) = 0 are:
The question is asking for real roots of x^2-f'(x)=9 And the solution is given for the equation x^2-f'(x)=0..... read more
Posted on March 27, 2018 1 Comments 0 Replies
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Posted on March 26, 2018 1 Comments 0 Replies
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For a reaction A  2B, rate of disappearance of 'A' is related to rate of appearance of 'B' by the expression   
In the question it is given 1/2A -->B But it is solved considering the reaction 1/2A --->2B..... read more
Posted on March 17, 2018 1 Comments 0 Replies
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I =  1 1 cos4 x   dx is equal to
Please explain the first and second step How can we write 1-cos^4x=(1+cos^2x)sin^2x..... read more
Posted on March 13, 2018 2 Comments 1 Replies
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The network shown in the figure is part of a complete circuit. If at a certain instant, the current I is 5 A, and is decreasing at a rate 103 A/s then VB – VA is
Since current is decreasing so sign of di/dt will also be considered. So Va-Vb=[1x5-15+5x(10^-3)x(-10^3)] So Vb-Va=15V..... read more
Posted on March 09, 2018 1 Comments 3 Replies
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If for real number y, [y] is the greatest integer less than or equal to y, then the value of the integral 3/2/2 [2 sin x]dx is :
In the question the limits are from ?/2 to 3?/4 In the solution it is solved for limits ?/2 to 3?/2...... read more
Posted on February 27, 2018 1 Comments 1 Replies
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If sin–1 x + cos–1 x = /2 then x is equal to 
Sir question and solution does not match. For given question all options are right...... read more
Posted on January 18, 2018 3 Comments 3 Replies

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