Q1.. In a zinc manganese dioxide dry cell, the anode is made up of zinc and cathode of a carbon rod surrounded by a mixture of MnO₂ , carbon, NH₄Cl and ZnCl in a aqueous base. The cathode reaction may be represented as:

 

Q2.. A current of 10.0 A is passed through 1.0L of 1.0M HCl Solution for 1.0hr . Calculate The pH of the solution at the end of d experiment. Wht is d volume of total gas evolved at STP?

 

please give the method...

if u can really work hard then u can do ... like one chapter from ur board syllabus in around 1-2 days of 1 subject only at a time from the school books.. don't spend more than 2-2.5 hours in this... and now that u must be havin summer vacations so u can do a little extra.. and devote rest of the time to IIT.. as for the books.. i like h.c. verma, obj physics-arihant are good n for maths.. tmh, arihant, IA maron_calculus are good.. for chem try out Morison, disha's iit challenger, P.bahadur, r.k. bansal 4 organic

and for the elite courses.. i don't think i wud be of much help here.. as i havn't joined any correspondence myself.. i'll just join the test series..

covers all d three subjects

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Q1. A proton flies with an initial velocity v_o into a parallel plate capacitor in a direction making an angle  to the nagative plate and leaves the capacitor at an angle  to the plates. The length of the capacitor plates is L. Find the intensity E of the field between the plates and the kinetic energy of the electron as it leaves the capacitor. take the mass and charge of the proton as m and e respectively.

 

Q2. Two spherical bobs of same mass and radius having equal charges are suspened from the same point by string of same length. The bobs are immersed in a liquid of dielectric constant K and density _o . Find the density  of the bob for which the angle of divergence of the strings to be the same in the air and in the liquid.