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what is dark matter ??? ...
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the current density across a cylindrical conductorof radius R varies ; j=j0 {1-r/R} ,where r is the distance frm the axis .thus the current density is maximum j0 at the axis r=0 and decreases linearly to zero at surface r=R c ...
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a triangle is constructed using wires ..ab, bc,ca of same material and of resistance ....alpha ,2alpha,3alpha rescptivly....Another wire of resistance alpha/3 frm A can make sliding contact wid wire BC . find maximum resistan ...
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it a q asked in jee 1995.. C6H5OCH3 + HI +HEAT GIVES,..... MY QUESTION is .....in the ans it is given we get cleaved product...but whn vinylic ether are treated wid HI...gives substituted product... ...
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what wil be product.... a) phenol + HCN + hcl at 70° c.. b) acetophenone + HCOOOH -----A +HYDROLYSIS... ...
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acetone can be converted into pinacole by???? →pinacole is not a name of specific compound na??? ...
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wht does SeO2 do..?????? ...
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*Image* ...plzzzsolve q 10...top most ...
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i read tht if secondary alcohols when vigriously oxidised in kMnO4 gives acit...but whn we use bwrd vigrious do we mean heating it?/? ...
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wch type of compound shw decarboxylation eg willl 4-oxo pentanoic acid shw decarboxylation?? ...
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is there any test on alcohol, ethers????????plzzz do tell me... ...
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the plates of a parallel plate capacitor are charged upto 100 v .a 2mm thick insulator sheet is inserted btn plates . to maintain same potential diff .the distance btn plates is in creased by 1.6mm. the dielectric constant of ...
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a capacitor is connected to a battery. the force of attraction btn plates whn the separation is halved??? a remains same. b becoms 8 tims c bcms 4 times d bcms 2 tims ...
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the value of x in [-2pi,2pi].for which the graph of function ..y=√1+sinx/1-sinx - secx and y= -√1-sinx /1+sinx+ secx concide are.... in this can we solve by graph??????? if not wht approach shud we use??????/ ...
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in vinylic ethers...why does cleavage does not take place whn treated wid conc HI soln... on the other hand normal ethers show cleavage....??? and do vinylic ethers show cleavage only when treated wid dil acid???? ...
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three straight lines r drawn thru a pt lying in a triangle abc ,parallel to its side.the area of the resulting triangles are 1,4,9 sq cm..then area of triangle abc???? ...
