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Chemistry: Post your doubts here!
for Q11 lone pairs make compounds polar more lone pairs means more polar so ammonia can not be more polar than water. stronger base will pull those H+ protons with greater ease. for Q16 for option A u get a complex ion where Cl has oxidation number of -1 for option B u get HCl again -1 for... -
AS/A2 bio phys chem doubts? Post and I will answer ASAP :D
why are u people making so many threads? -
Chemistry: Post your doubts here!
for Q40 primary or secondary alcohol oxidize to form aldehyde and ketone respectively. u reverse the process that is called reduction -
Chemistry: Post your doubts here!
however it would react with sodium like any alcohol does -
Chemistry: Post your doubts here!
for Q38 here X is the halide concentration depends upon the halide for 1 we have two Cl atoms making it double the reaction . br- and I- are weaker than Cl- bond so weaker bonds breaks more quickly than a stronger one for q39 problem with dehydration here is that there would be 4 double bonds... -
Chemistry and Physics AS paper 12 MCQS
for q 36 u know for internal resistance cell we find emf by formula E=v-ir .E=3-i*2 lets find i (curret) I=V/R=3/6 6 as total resistance is 6 so we get current as 0.5 amps we get E=3-0.5*2=2 output power means power dissipated in ouput source that is 4 ohm resistor P=(I^2)R =1W so u get it right... -
AS Practical list
Justify the number of significant figures that you have given for your values of k. how do we solve this? in physics practical -
AS Physics Practical - Paper 34
u are from which country and planet? -
AS Physics Practical - Paper 34
wrong is it for paper 34 i doubt it -
Help in chemistry may 2012 paper 11
increasing the temperature will not increase the forward reaction as it is exothermic .. system oppose the change its not like u increase the temperature system would release heat(increase temperature) NO system would try to decrease the temperature by endothermic reaction. -
there is none they shut down the servers entire night
there is none they shut down the servers entire night- snowbrood
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Physics: Post your doubts here!
u know that final velocity will be greater than u and it will be negative so acceleration will also be negative -
Physics: Post your doubts here!
a=v-u/t and as V final velocity will always be negative for a body moving downwards so the acceleration will be negative.. in alevels u do have to give positive and negative signs its not o levels -
Physics: Post your doubts here!
aslamalaikum look u have to consider velocity of body going up as poisitve and body going down as negative. case 1. when u throw a ball upwards its speed decreases to zero so u would conclude that there is deceleration which means negative accleration . case 2 when the ball from that highest... -
Tips for Chemistry Practicals (P3)
now i wonder how come i never observed relighter glowing matches hahaha -
23 MAY ,CHEMISTRY PRACTICAL 34,Post your doubts here and Notes
how to differentiate between h2s and so2 -
hey any guess for practical 34 chemistry pm me
hey any guess for practical 34 chemistry pm me- snowbrood
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chemistry practical doubts for paper 34
post your doubts here lets see if someone could help us. well my query is that how to know if a solution has a ppt or has no ppt . i think if we put a white paper with the testtube and if we can see that white paper through test tube that there is no ppt is my assumption right correct me