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Some one please explain q 3 part D http://maxpapers.com/syllabus-materials/chemistry-5070/attachment/5070_s14_ms_21/
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Biology; Chemistry; Physics: Post your doubts here!
- Thread starter scouserlfc
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it was ovary.. When it enters the micropyle of ovary, only then it is released from pollen tube.ooooothat makes sense i was confused because i missread DAMN!
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Anybody explain how to make paralellogram diaagrams with vectors?
because lead carbonate is insoluble and lead oxide is only soluble in HCL
It was ovule be
cause male gametes only leave pollen tube when they reach ovule
Lead sulphate is an insoluble salt. It can only be made by ionic precipitaion by adding aqueous solutions that are soluble.
Once the pollen tube successfully attains an ovule, it delivers the two sperm cells with a burst. (wikipedia)
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Can anybody tell me the answers for the questions of alleles and gene mutattion in paper 2
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Mg is below to Ca so it would take less time to decompose than CaCO3
Pb is below Fe
All about reactivity series
My teacher told me that we never select first titration reading since it is always a rough titration....
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Are you mad? the best titration results are always those that differ by only 0.2 cm3.
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Can anyone please solve this?
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D. only... cuz distillation is used to seperate soluble liquids
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look you know what I did about 10 tritration questions and all of them have second and third tritration result..... I wonder why maybe cie is drunk or something...
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I answered the same, but marking scheme says...."C" :/
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Yes, I know. I solved last 15 years' past papers and all had 2 and 3 results as being the best. But it does not imply that every time you are going to do the titration the results would remain same. It was a bit conceptual.look you know what I did about 10 tritration questions and all of them have second and third tritration result..... I wonder why maybe cie is drunk or something...
first cancel out all those which are incorrect......chlorination is used to kill bacteria therefore 1 is out..........2 is to remove salt from sea water (in the qstion they are taking about INSOLUBLE IMPURITIES) so 2 is also out..........I guess answer is option C......which year past paper is it tho?
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why didn;t you cancel out the 3rd one? Simple Distillation is used to separate a pure liquid from a solid dissolved in it and fractional distillation is used to separate two miscible liquids. btw its from 2014 mj variant 11.
well, distillation means to evaporate and then condense the liquid.........just for example u place pebbles(insoluble impurities) in water and then carry out distillation......ULL GET THE WATER BACK.......3 is also correct, but to some extent.
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your teacher is soo wrong there. It can be 1,2 or 2,3 or 1,3. It just depends on which readings give you best result.