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Chemistry: Post your doubts here!

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Bro, can you explain how enthalpy change of prod. Is 38-214?
Wat is the state of I2??.............It is solid
In the reaction I2(g) + 3Cl2(g)--> 2ICl3(s) ,Iodine in the gaseous physical state is used,so u should include the enthalpy change which changes solid iodine into gaseous iodine
Hope u got it :D
IS this clear or u want further explanation :)
 
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http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s09_qp_1.pdf
q15- A
q20-c

p.s: any notes on oxidation states in complex ions, really need it :S
Q.15) check if Ag is undergoing oxidation or reduction. You'll find out that the oxidation number of Ag will remain +1. (Oxidation number of S2O3 is -2) Thus, you can eliminate b,c,d and answer will be A.
Q.20) There are three double bonds in the acid. Each double bond results in an cis-trans isomer. Therefore, in total six isomers possible.
*for notes, you can check chemguide.uk
 
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Can someone plz plz plz answer this question...

1) is correct because nitrogen is reducing and chlorine is oxidizing so nitrogen undergoes a redox reaction
2) NaClO is the bleach
3) AgNO3 (aqueous) + NaCl (aqueous) -----> AgCl (white precipitate) + NaNO3 (aqueous)

therefore answer = A
 
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