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Chemistry Guess Paper?

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djaskari

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In the cracking experiment conducted in laboratory, we immerse cotton wole in oil n put it in an air tight container, piesces of porcelain r used to catalyse the reaction n on the other side ethene comes off!!
 
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BaKa

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Muhammad Talha said:
hey smeone tell me abt the colours of different precipitates???...:)
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well dude this is in the past papers so prepare well...


CU 2+ light blue ppt in naoh insoluble
iron2 green ppt in naoh
iron3 red brown ppt in naoh


and these are it...

the rest are all white ppt and youll have to look up which are soluble and insoluble in excess naoh and aq NH3

Good Luck...
 
dragoninja98

dragoninja98

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Guys sometimes the paper gives us unexpected appearances of metals ad chemicals...for example CuO...ummm ad other such metals
please provide a list for the appearances ad colors we need to remember
 
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BaKa

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LoL paper over and i donno about the apperences i just make assumptions :p
 
Mayedah

Mayedah

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djaskari said:
sir rizwan is awsum!!
Attempt m/j 1999, 2006 n 2004 papers! MCQs are likely 2 be repeated!!
N do the cracking experiment (conducted in laboratory) it is likely to come this year!!!
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Are u talking abt the one who teaches at fahims ?
 
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