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  1. chishtyguy

    Chemistry: Post your doubts here!

    nitric acid HNO3 will dissociate into H+ +NO3-, just like HCL Ethanoic hardly dissociates NaOH is a base When H2SO4 dissociates it gives 2 H+ ions.
  2. chishtyguy

    Chemistry: Post your doubts here!

    Yes that's the one, if that is your score then inshaAllah u will Obtain an A..
  3. chishtyguy

    Physics: Post your doubts here!

    My mistake... Answer is B... It's the cell with which the voltmeter is connected not the resistor... So Emf coming out of the cell and across the 15 ohm resistor is 7.5V... Then by using the formula I=V/R =7.5/15 , we will get .5 A current...
  4. chishtyguy

    Ha ha ha... Just dream on :P

    Ha ha ha... Just dream on :P
  5. chishtyguy

    Done with it Bl ........ I m great, as always :D Alhumdullilah.... And what are u doing, I have...

    Done with it Bl ........ I m great, as always :D Alhumdullilah.... And what are u doing, I have heard that u were very busy recently??
  6. chishtyguy

    Chemistry: Post your doubts here!

    Hmmmm...You have very little time left... Do u have David Ecaster,Chemistry Book... If u have Then revise maximum topics... Just try to clear as much concepts as u can... Revise ol pst paper and don't worry about the marks... Just try to clear ur concepts up... insha Allah u will do great...
  7. chishtyguy

    Chemistry: Post your doubts here!

    Q4 A N2+O2 > 2NO Bond Energy (994 496) Bond energy= Bond Breaking - Bond Form rearrange it as Bond form= (994+496)- 180 U will get 1310 J that is for 2 molecules And for 1 molecule 1310/2= 655 Q10 U have to make a born cycle in these kinds of question use the...
  8. chishtyguy

    Chemistry: Post your doubts here!

    Don't say that.. A's Chemistry requires a lot of practice and cleared concept... It's MCQs are hell... But ones's u get ur concept get cleared.. iA u can conquer it.. Just dont lose hope...
  9. chishtyguy

    Chemistry: Post your doubts here!

    Question 35 Remember it particularly mentions atmosphere, Reaction of Nitrogen and sulphur can occur in atmosphere while CO has triple bond it can't take place Q 27 Butan-2-ol forms 2 alkene and a cistrans while in option D, No cistrans only 2 alkene
  10. chishtyguy

    Physics: Post your doubts here!

    Ahahaha..... Thanks... I know about relative speeds... Add Maths RV.... Bro u have amazing concepts.... (Y)
  11. chishtyguy

    Thanks Dude(Y)... And Maam It ain't cute... It's just the style of cool people Saying Ta'Ta...

    Thanks Dude(Y)... And Maam It ain't cute... It's just the style of cool people Saying Ta'Ta... Bl :P
  12. chishtyguy

    Physics: Post your doubts here!

    Consider the wave as displacement time graph... where gradient is Max velocity is maximum at B and D gradient is zero so lowest velocity there...
  13. chishtyguy

    Physics: Post your doubts here!

    For question no 10 it's D its not B, As velocity vertical component is continuously changing while horizontal component is Constant Its not A, Veloicity can't be zero because object has not yet landed Its not C, Although at maximum height vertical component is zero but there is a horizontal...
  14. chishtyguy

    *~*~♦ тнᴇ αят ᴏƒ ɢяᴏᴏмɪɴɢ уᴏυя ѕᴏυʟѕ ♦~*~*

    MaShaAllah... Hey Become an Alima... If u can... and I know that u will become the most reliable, helpful and the best person among us...
  15. chishtyguy

    Physics: Post your doubts here!

    Q1 answer is C as c= Wavelenght/ time t=wavelenght/c= 2x10^15 waves in one sec is frequency so f= 1/2x10^15= 5x10^14 Q5 Well I got it wrong at first... But it's just look at the actual true current .8 and look at faulty ammeter its also .8, so both the readings are closest Q10 M not completely...
  16. chishtyguy

    CIE's??? really? LOL

    MCQs of Physics and Chemistry.... The most hardest of A's ... Good Luck... And give your best... (y)
  17. chishtyguy

    Physics: Post your doubts here!

    Q5 is .6% as Volume 4/3 (Pie) r^3 so cube will become the co-efficient as 3( l'/l) Percentage uncertainity in Volume is v'/v x100 = 3(l'/l) x 100 that is .6%
  18. chishtyguy

    Physics: Post your doubts here!

    Answer is A as.... voltage across 15 Ohm resister is 9-7.5= 1.5V By using the formula 15/(R+15)x 9 = 1.5, R= 75 .... Then total resistance is 75+15 = 90 Ohm.... I=V/R so I= 9/90= .1 A
  19. chishtyguy

    Physics: Post your doubts here!

    Is the answer A ??
  20. chishtyguy

    Physics: Post your doubts here!

    Answer is D, As Work done is the energy converted/changed so as WorkDone= 10-0= 10J W.D= Force * Distance.... Force= (10)/.005m = 2000N
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