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Author Topic: chem mcq  (Read 802 times)

Offline AN10

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chem mcq
« on: March 18, 2010, 05:13:53 pm »
someone plz explain to me MCQ 19 and 21 of oct/nov 09 p11

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nid404

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Re: chem mcq
« Reply #1 on: March 18, 2010, 06:06:22 pm »
upload the paper plz...my file's corrupted :(
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Offline AN10

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Re: chem mcq
« Reply #2 on: March 18, 2010, 07:36:16 pm »
here is da paper
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nid404

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Re: chem mcq
« Reply #3 on: March 19, 2010, 04:28:31 am »
Q19)
 ammonium is NH4 +
so cyanate will have 1- charge...B is ruled out
cyanide is CN-
cyanate will be oxidised cyanide......hence CNO-
A

21)

Total no of double bonds
3 in the cyclohexane ring
1 in the aldehyde (C=O)
1 is the alkene C=C between C11 and C12

so total of 5

cis isomer has the higher groups(R) on the same side.

Hence A
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