Which of the following compound will exhibit cis-trans (geometrical) isomerism?
2-butene
Butanol
2-butyne
2-butenol
A.
2-butene
Compounds which have at least one double bond (C=C) and the groups attached with double bonded carbon atoms are different exhibit geometrical isomerism.
Sponsor Area
Which of the following compounds will undergo racemization when a solution of KOH hydrolysis?
(i) and (ii)
(iv)
(iii) and (iv)
(i) and(iv)
(i) and(iv)
B.
(iv)
Only compound (iv) result in the formation of racemic product due to chirality.other three do not show chirality.
Sponsor Area
which of the following does not show optical isomerism? (en = ethylenediamine)
[Co(en)2Cl2]+
[Co(NH3)3Cl3]0
[Co(en)Cl2(NH3)2]+
[Co(en)3]3+
B.
[Co(NH3)3Cl3]0
optical isomerism is exhibited by only those complexes in which elements of symmetry are absent. Octahedral complexes of the types [M(aa)3], [M(aa)x2,y2] and [M(aa)2x2] have an absence of elements of symmetry, thus exhibit optical isomerism. Here, aa represents bidentate ligand, x or y represent monodentate ligand and M represent central metal ion.
Hence, [Co(NH3)3Cl3]o due to the presence of symmetry elements does not exhibit optical isomerism.
Which of the following has longest C-O bond length? (free C-O bond length in CO is 1.128 A0)
[Co(CO)4]-
[Fe(CO)4]-2
[Mn(CO)6]+
Ni(CO)4
B.
[Fe(CO)4]-2
As the negative charge on metal carbonyl complex increases back pi bonding increases and hence the bond length of C-O bond increases while the bond length of metal-carbon bond decreases. Hence,[Fe(CO)4]2- has longest C-O bond length among the given complexes.
The correct order of bond length of the given complexes is
[Mn(CO)6]+<[Ni(CO)4]<[Co(CO)4]-<[Fe(CO)4]2-
Which of the following is not chiral
2-butanol
2,3 -dibromo pentane
3- bromopentane
2-hydroxypropanoic acid
C.
3- bromopentane
Sponsor Area
Mock Test Series
