(b) Compound A (CH20) gives off oxygen on treatment with sodium metal and also decolonizes Br in CCL to give organic compound B. Compound A on treatment with b in NaOH gives lodoform and a salt C which after acidification gives a white solid D(CHO). Using knowledge of organic chemistry, identify structures A, B, C and D. (10 marks)

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

Which characteristic of water it form droplets? a. low specific heat b. nonpolar structure c. high surface tension d. ability to dissolve substances

Both josef loschmidt and amedeo avogadro contributed to our understanding of basic molecular numbers, sizes, and reaction ratios. neither scientist discovered “avogadro’s number” in the form we use it today (6.02 x 10 23). still, there’s a controversy over the name. research the contributions from these two scientists and read about how avogadro’s number got its name. briefly state what you think this number should be called, providing key details of each scientist’s contributions to this concept and a solid rationale for your case in naming the number.