241)d ..max no. of chelation
Q1. The most stable complex is
(a) [Cu(NH3)6]2+
(b) [Cu(NH3)4en]2+
(c) [Cu(NH3)2(en)2]2+
(d) [Cu(en)3]2+
ans given (c)
Q2. Choose correct statement
(a) 
on oxidation with HIO4 gives cyclopentanone and formaldehyde
(b) In 
during pinacolone formation, methyl shift occurs
(c) The formation of oximes is hindered at high pH
(d) nitrobenzne on benzoylation gives meta product
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16 Answers
39Q2. (d) I am sure. (a) is correct too.
(b) is incorrect because migratory aptitude is H > Ph > alkyl groups
(c) I am not sure of.
106Q2. ans given only (a)
oximes fomation is hindered naa??
see NCERT part II (in carbonyl compds) as the N gets protonated and nucleophilic nature is destroyed..
39Hmm okay but why is (d) incorrect?
Doesn't high pH mean extremely basic medium? How is oxime protonated in that case..
1061. given (C)
@pritish: sorry .. that was wrong explanation
i thot very low pH....
but any way ideal pH is slighlty acidic naa?
106@manmay.. sory was in a hurry ... ans given C for Q1. and A for Q2.
1@oye.....kuch der pehle #8 me c likha hua tha...either u edited or i'm going mad (the jee effect [3])
4@Asish : r these from AIATS ??
Did he give any explanation for c of 1 ??
1for Q2.....maybe we get odd products..(oxidation or sumthing like tat)
106Q2. (a) is correct...... nitrobenzene doesnt give FC so (d) incorrect
but for (c) very high pH means dehydration wont occur naa?