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Chemistry Paper 1 Doubts!
and 39 is B because 1st statement is correct as it cholestrol has a alcohol group .. so ester can be formed . 2nd statement is correct too because cholestrol has a Carbon double bond which will both be chiral when bromine is attached to them 3rd is wrong because aldehydes form when a primary... -
Chemistry MCQ thread...
phew! so what I said earlier makes sense then? It's chloro flouro carbons which are used in extinguishers? (and btw some of the HALOGENOALKANES are extremely flammable!) ^ yeah u were right .. -
Chemistry Paper 1 Doubts!
q30 is C because for Y to react with ethanol in the presence of acid Y must be a carboxylic acid .. so in option C the carboxylic has six carbon atoms and the alcohol has 2 carbons .. if u get what i mean .. :P -
Chemistry Paper 1 Doubts!
q 27 is D because it is unreactive to mild oxidising agents so the carbons of the double bond are both attached to a methyl grp which makes it less reactive -
Chemistry Paper 1 Doubts!
q23 is D because no. of carbons cant be more than the original in cracking .. -
Chemistry MCQ thread...
saturation u were right .. q5 is D .. it is w08 qp1 q 38 . answer is D .. -
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Chemistry MCQ thread...
i dont know it either .. only know it because ive seen this question in past papers 2 or 3 times.. atleast now ur sure abt the answer because the marking scheme says so -
Chemistry MCQ thread...
@saturation my answers were correct and now u can even check them from mark scheme :P -
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Chemistry MCQ thread...
@Saturation ur q2 is june 2010 qp11 q24 and answer in marks scheme is C ur q3 is june 2010 qp11 q28 and answer " " " is D ur q4 is june 2010 qp11 q29 and answer " " " is B -
Chemistry MCQ thread...
@saturation ur q1 is june 2010 qp11 q22 and answer from mark scheme is B -
Chemistry MCQ thread...
@saturation . ill look for 5 in the past papers and let u know .. -
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Chemistry MCQ thread...
@ saturation 1 is B 2 is C 3 is D 4 is B 5 is B -
Chemistry Paper 1 Doubts!
Q9. when its the other way round the activation energy would be higher .. and the enthalpy change would be positive because : enthalpy change = energy of products - energy of reactants and the products would hav more energy in the reverse reaction than the reactants . so the difference of their... -
Chemistry Paper 1 Doubts!
Q7. helium is the answer because the noble gases tend to show the most ideal gas behaviour .