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SHANTANU MISHRA (shantanu) (
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from patna, bihar, india, joined 3 years, 1 month ago


Q. anhydrous ZnCl2 is used in lucas reaction to absorb water what will happen if water is not absorb ...
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1 answer under Alcohols, Phenols and... 3 years ago

A. Anhydrous ZnCl2 in Lucas reaction is not used to absorb water, rather, the Zn, is used to form complex with the OH- , so that it becomes a good leaving group. We already know that OH- is not a good... link
3 years ago
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Q. a rigid rod is placed against a wall. when its velocity of lower end is 10m/s and its base makes an angle = 60degree with ...
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2 answers under Laws Of Motion 2 years, 11 months ago

A. let the length of the rod be l.. i am not so sure better check with a text or guide.. let the x co-ordinate be a let y co-ordinate be b then a^2 + b^2 = l^2 as the angle is 60 and... link
2 years, 11 months ago
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Q. lithium has highest ionisation enthalpy yet it is used as reducing agent why ...
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1 answer under The s-Block Elements 3 years, 1 month ago

A. having highest ionisation enthalpy it gives away electron very easily, hence can get oxidised very easily, and by donating electron to others so easily, it can act as reducing agent. link
3 years, 1 month ago
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Q. four point masses of value 2,5,6and 3kg are placed at four corners of square frame abcd of side 0.4m having negligible mass ...
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1 answer under System Of Particles And... 3 years ago

A. You will need to find the net Moment of Inertia of the system first, refer: http://picasaweb.google.com/rishav21/Work#5465177142479721154 P.S. the 10 kg body will not be considered because,... link
3 years ago
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Q. six similar charge each of value q=10micro coulomb are placed at the base on the corner of the hexagonal pyramid. if the slant edge ...
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1 answer under Electrostatic Potential... 3 years ago

A. GOOD QUESTION! You'll need quite a bit of Imagination!!! REFER: http://picasaweb.google.com/rishav21/Work#5468447319573696834 link
3 years ago
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Q. the density of graphite and diamond at 298 k are 2.25 and 3.31 gm per cmcube if the standard free energy difference is ...
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2 answers under Thermodynamics 3 years ago

A. Standard Free Energy Difference = Useful work = PdV dV = m/(1/2.25 - 1/3.31) 10^-3 cubic metre Therefore, 1895 = P * m/(1/2.25 - 1/3.31)*10^-3 [where m= mass of the carbon, unfortunately thats not... link
3 years ago
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Q. why for constructive interference path difference between two waves should be an even multiple of wavelength ...
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2 answers under The Infamous Double Slit... 3 years, 1 month ago

A. Try and understand it this way: We know that, resultant amplitude of two interfereing waves: (A)^2 = (A1)^2 + (A2)^2 + 2 (A1)(A2) (cos φ) where cosφ = phase difference between the waves A1,... link
3 years, 1 month ago
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Q. how is dark reaction different from light reaction ...
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1 answer under Photosynthesis in Higher... 3 years, 1 month ago

A. refer: http://picasaweb.google.com/rishav21/Work#5464071184070196434 link
3 years, 1 month ago
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Q. what is muta rotation ...
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1 answer under Optical Isomerism 3 years, 1 month ago

A. Mutarotation is the change in the optical rotation that occurs by epimerization (that is the change in the equilibrium between two epimers, when the corresponding stereocenters interconvert). Cyclic... link
3 years, 1 month ago
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Q. why is racemic mixture opticaly inactive ...
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1 answer under Optical Isomerism 3 years, 1 month ago

A. bacause, it has equal molar proportions of d- and l- isomers, who effectively cancel eachother making the mixture optically inactive. link
3 years, 1 month ago
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