AS Unit 3B Biology :) ==How was the exams? comment here

[abdullahkhan196]

Nightmare V_V

 

[aniekan]

ORGANIC CHEM!!! donno a thing....

PM me with your problems _ I'll see how i can help you

 

[Lost_Life]

Guys how can we sol 2012 june q 1 part d :'( why did i get this wrong though?

 

[aniekan]

Guys how can we sol 2012 june q 1 part d :'( why did i get this wrong though?

for which subject ?__ what Unit ?

 

[Manasa]

Guys how can we sol 2012 june q 1 part d :'( why did i get this wrong though?

same prob..

 

[Lost_Life]

for which subject ?__ what Unit ?

unit 3B chemistry

 

[aniekan]

unit 3B chemistry

Hang on _ I'm checking it now

 

[aniekan]

Guys how can we sol 2012 june q 1 part d :'( why did i get this wrong though?

is it the ammonia thingy? _ white smoke

 

[Lost_Life]

is it the ammonia thingy? _ white smoke

i wrote white smoke appears and white solid forms. But according to the MS its white solid disappears?? I'm confused

 

[aniekan]

oh god!! fml!! damn it! it's white ppt dissolves or disappear I completely forgot _ that's test for Halide ions
Silver cheloride is white ppt
___add dilute ammonia: dissolves
___expose to sunlight : ppt get darker

Silver Bromide is creamy ppt
__add conc. ammonia ; dissolves
__expose to sunlight: ppt get darker

Silver Iodide is yellow ppt
___add conc. ammonia : nothing happens i.e still remain as yellow ppt
___expose to sunlight : nothing happen _ still remain as yellow ppt

 

[Lost_Life]

oh god!! fml!! damn it! it's white ppt dissolves or disappear I completely forgot _ that's test for Halide ions
Silver cheloride is white ppt
___add dilute ammonia: dissolves
___expose to sunlight : ppt get darker

Silver Iodide is creamy ppt
__add conc. ammonia ; dissolves
__expose to sunlight: ppt get darker

Silver Iodide is yellow ppt
___add conc. ammonia : nothing happens i.e still remain as yellow ppt
___expose to sunlight : nothing happen _ still remain as yellow ppt

OHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHMMMMMMMMMMMMMMMMMMMMMMYYYYYYYYYYYYYYYYYYYYYYYYYYYYGGGGGGGGGGGGGGGGGGGGGOOOOOOOOOOOOOOOOOOOSSSSSSSSSSSSHHHHHHHHHHHHHHHHHHHHHHHH

 

[Lost_Life]

oh god!! fml!! damn it! it's white ppt dissolves or disappear I completely forgot _ that's test for Halide ions
Silver cheloride is white ppt
___add dilute ammonia: dissolves
___expose to sunlight : ppt get darker

Silver Iodide is creamy ppt
__add conc. ammonia ; dissolves
__expose to sunlight: ppt get darker

Silver Iodide is yellow ppt
___add conc. ammonia : nothing happens i.e still remain as yellow ppt
___expose to sunlight : nothing happen _ still remain as yellow ppt

You mean silver bromide for the second one

 

[aniekan]

You mean silver bromide for the second one

lol yes haha mistake

 

[Lost_Life]

lol yes haha mistake

Thank you

 

[aniekan]

Thank you

welcome any time

 

[Hailstorm94]

yeah i chose 6 both pic were the same.. however guys im sure theyll be a range as the picture was blurry 4-7 will be alright....

 

[Hailstorm94]

i wrote a double bar graph too... however everyone in my class said it was line graph due to continous data the oxygen pressure thing... but being honest both might be right or very least u should get 2 marks... what i did was pressure on x oxygen con on y drew 2 bars for like 13.3 oxy pressure and highlighted one to show its plasma and other one left it to show pfc

 

[Hailstorm94]

my whole class including me circled d however its c im 100% sure... was coming back home for fun decided to open notes saw that answer was c as at c is the meristem where the cells are actively dividing

 

[Hailstorm94]

How do you draw the graph which they asked to sketch in question 2?

line graph... however ithink double bar chart would be fine too or atleast get u 2/3 marks

 

[aniekan]

Your friends did not read the Paragraph properly _ not that I'm right or anything _ but it said _ as oxygen pressure increases the solubility of oxygen in PFC is 2-3 x that of Plasma _ hence it's a bar graph _ line graph is also correct but the most likely one is Bar graph

Ditto: I'm not mark-scheme tho