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  1. M

    Chemistry: Post your doubts here!

    Thank Yew.. Glad You understood Do Pray for Me :)
  2. M

    Chemistry: Post your doubts here!

    O/N_2004_P1 -- Q9, Q12, Q13, Q39 Q9:-(B) Because it is alkane and alkanes produce max energy! i think u could also do this in terms of bond energy which is time consuming ;) Q12:-(B)https://www.xtremepapers.com/community/attachments/upload_2014-4-25_12-27-47-png.40167/ Q13:-(D) Because it...
  3. M

    Chemistry: Post your doubts here!

    O/N_2009_P12 Q34:- C Because lime and ammonium sulfate react and calcium displaces Ammonia to give calcium sulphate and Ammonia Gas. 1 is wrong So ans IS C :)
  4. M

    Chemistry: Post your doubts here!

    The question says One monomer Would form how many Polymers? Option 1:- it says One polymer. wrong One monomer would never form 1 polymer! Polymer is made up of million of Monomers! :) ;)
  5. M

    Chemistry: Post your doubts here!

    O/N_2009_P12 -- Q10 , Q20, Q28, Q34, Q38 , Q40 Q40:- (C) 1. it says one monomer would form polymer? how is that posible? so 1 is wrong then automatically answer is C. Q38:-C ,Ethanol is oxidized by KMnO4 Not Alumina. so 1 is wrong. then automatically answer is C. ;)
  6. M

    Chemistry: Post your doubts here!

    Also Explained 36 .(y) see above!!:p
  7. M

    Physics: Post your doubts here!

    Amazing !! i wasted 15 mins on this Quesstion :(!
  8. M

    Chemistry: Post your doubts here!

    M/J_2012_P12 -- Q5 , Q28 , Q36 Q5:-(A) Iodine because it has covalent bonds (I2) and vanderwaals forces! Q36:-(D)Because haber process is N2 + 3 H2 → 2 NH3 (ΔH = −92.4 kJ·mol−1) so Forward reaction is exothermic, if u Increase temp yeild goes Down, but Rate increases because Particles gain K.e...
  9. M

    Chemistry: Post your doubts here!

    O/N_2011_P12 -- Q26 Ethanol is converted to Ehanal (aldehyde) First find moles of ethanol :- Moles=mass/Mr Mass=2.3g..... Mr=46 (C2H5OH) Moles=0.05 Now find mass of aldehyde:- Mass=mole * Mr Mole=0.05...... Mr=44(C2H4O) Mass=2.2g But question says yeild is 70% so 70/100 * 2.2 =1.54 which Is A...
  10. M

    Chemistry: Post your doubts here!

    OK First 4 are gases ! Proof :-http://en.wikipedia.org/wiki/Alkane#Boiling_point it says : Under standard conditions, from CH4 to C4H10 alkanes are gaseous Happy :D
  11. M

    Chemistry: Post your doubts here!

    I did explain M/J_2011_P12 - Q8!! What confusion do u Have?
  12. M

    Chemistry: Post your doubts here!

    M/J _2006_P1 -- Q32 Ans Is B. 1. It says enthalpy change of atomisation, yes we need to Know because Na(s) is converted to Na(g) 2. says Ionisation energy, we need Ionisation energy because it is converted from Na(g)(neutral) to Na(g)(Positive ione) 3. We dont need it because formation if for...
  13. M

    A level Biology: Post your doubts here!

    It says NOT. Ans is B So 1 Occurs in alveoli where it picks up oxygen, in tissues it should be other way around. and 3: The Hydrogen carbonate ion and H+ also combine in alveoli to form H2CO3. In tissues CO2 dissolves in H20 to give H2CO3 which must disassociate to form Hydrogen carbonate ion...
  14. M

    Physics: Post your doubts here!

    K.E=(m*(v)^2)/2 K.E=P^2/2m Since, p=mv so p^2=(mv)^2 K.E= m^2 * v^2/2m m cancels out in the numerator and the denominator to give m*v^2/2 Hope i Helped :)
  15. M

    A level Biology: Post your doubts here!

    First find Out What One unit on Graticule represents. It says the Slide has division of 0.1 mm, which are equivalent to 50 on Graticule. So 1 division on Graticule is 0.1/50 =0.02 mm. Now look at Diagram One, Take the pollen which grows Straight (parallel to scale), Then place a ruler and see...
  16. M

    Chemistry: Post your doubts here!

    Plz if you could specify which part of it , it would be lot easier For Me! :)
  17. M

    A level Biology: Post your doubts here!

    Which Year is this from? Is Ans A?
  18. M

    Chemistry: Post your doubts here!

    This Is Detailed Explaination, I dont Think it would consume time if u Practice it! Besides You always Have One and Half Minute Per question. :)
  19. M

    Chemistry: Post your doubts here!

    I will start with D First write down the equation:- ........................ 2P ------ Q + 2R Initial Moles= 2 (P) 0(Q) 0(R) It is given in the question x moles of R at Equilibrium, so we could find moles of Q using...
  20. M

    Chemistry: Post your doubts here!

    That was A Typo Sorry :)
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