Chemistry-
General
Easy
Question
All the following complex show decreases in their weights when placed in a magnetic balance then the group of complexes having tetrahedral geometry is :
i) Ni(CO)4
ii) K[AgF4 ]
iii) Na2 [Zn(CN)4 ]
iv) K2 [PtCl4 ]
v) [RhCl(PPh3)3 ]
- (ii), (iii), (v)
- (i), (ii), (iii)
- (i), (iii), (iv)
- None of these
The correct answer is: None of these
Related Questions to study
chemistry-
complex A
complex B
A & B complexes have the co-ordination number 4.
The IUPAC name of complexes ‘A’ & ‘B’ are respectively :
complex A
complex B
A & B complexes have the co-ordination number 4.
The IUPAC name of complexes ‘A’ & ‘B’ are respectively :
chemistry-General
chemistry-
On treatment of 100 mL 0.1 M Solution of CoCl3.6H2Owith excess AgNO3, 
ions are precipitated The complex is :
On treatment of 100 mL 0.1 M Solution of CoCl3.6H2Owith excess AgNO3, ions are precipitated The complex is :
chemistry-General
chemistry-
How many EDTA (ethylenediaminetetraacetic acid) molecules are required to make an octahedral complex with a Ca2+ ion ?
How many EDTA (ethylenediaminetetraacetic acid) molecules are required to make an octahedral complex with a Ca2+ ion ?
chemistry-General
chemistry-
In Fe(CO)5, the Fe – C bond possesses :
In Fe(CO)5, the Fe – C bond possesses :
chemistry-General
chemistry-
When degenerate d-orbitals of an iSol. ated atom/ion come under influence of magnetic field of ligands, the degeneracy is lost The two set 
and 
are either stabilized or destrabilized depending upon the nature of magnetic fieldIt can be expressed
diagrammatically as:
Value of CFSE depends upon nature of ligand and a spectrochemical series has been made experimentally, for 
is about 4/9 times to 
tetrahedral complexes, (CFSE for octahedral complex)This energy lies in visible region and i.e., why electronic transition are responsible for colour Such transitions are not possible with d0 and d10 configuration.
Crystal field stabilization energy for [
in terms of parameter Dq is – 
When degenerate d-orbitals of an iSol. ated atom/ion come under influence of magnetic field of ligands, the degeneracy is lost The two set and are either stabilized or destrabilized depending upon the nature of magnetic fieldIt can be expressed diagrammatically as:
Value of CFSE depends upon nature of ligand and a spectrochemical series has been made experimentally, for is about 4/9 times to tetrahedral complexes, (CFSE for octahedral complex)This energy lies in visible region and i.e., why electronic transition are responsible for colour Such transitions are not possible with d0 and d10 configuration.
Crystal field stabilization energy for [in terms of parameter Dq is –
chemistry-General
chemistry-
When degenerate d-orbitals of an iSolated atom/ion come under influence of magnetic field of ligands, the degeneracy is lost The two set and are either stabilized or destrabilized depending upon the nature of magnetic fieldIt can be expressed 
diagrammatically as:
Value of CFSE depends upon nature of ligand and a spectrochemical series has been made experimentally, for is about 4/9 times to tetrahedral complexes, (CFSE for octahedral complex)This energy lies in visible region and i.e., why electronic transition are responsible for colour Such transitions are not possible with d0 and d10 configuration.
is purple while is colourless because –
When degenerate d-orbitals of an iSolated atom/ion come under influence of magnetic field of ligands, the degeneracy is lost The two set and are either stabilized or destrabilized depending upon the nature of magnetic fieldIt can be expressed diagrammatically as:
Value of CFSE depends upon nature of ligand and a spectrochemical series has been made experimentally, for is about 4/9 times to tetrahedral complexes, (CFSE for octahedral complex)This energy lies in visible region and i.e., why electronic transition are responsible for colour Such transitions are not possible with d0 and d10 configuration.
is purple while is colourless because –
chemistry-General
chemistry-
When degenerate d-orbitals of an iSolated atom/ion come under influence of magnetic field of ligands, the degeneracy is lost The two set and are either stabilized or destrabilized depending upon the nature of magnetic fieldIt can be expressed 
diagrammatically as:
Value of CFSE depends upon nature of ligand and a spectrochemical series has been made experimentally, for is about 4/9 times to tetrahedral complexes, (CFSE for octahedral complex)This energy lies in visible region and i.e., why electronic transition are responsible for colour Such transitions are not possible with d0 and d10 configuration.
For an octahedral complex, which of the following d-electron configuration will give maximum CFSE?
When degenerate d-orbitals of an iSolated atom/ion come under influence of magnetic field of ligands, the degeneracy is lost The two set and are either stabilized or destrabilized depending upon the nature of magnetic fieldIt can be expressed diagrammatically as:
Value of CFSE depends upon nature of ligand and a spectrochemical series has been made experimentally, for is about 4/9 times to tetrahedral complexes, (CFSE for octahedral complex)This energy lies in visible region and i.e., why electronic transition are responsible for colour Such transitions are not possible with d0 and d10 configuration.
For an octahedral complex, which of the following d-electron configuration will give maximum CFSE?
chemistry-General
chemistry-
When degenerate d-orbitals of an iSolated atom/ion come under influence of magnetic field of ligands, the degeneracy is lost The two set and are either stabilized or destrabilized depending upon the nature of magnetic fieldIt can be expressed diagrammatically as: 
Value of CFSE depends upon nature of ligand and a spectrochemical series has been made experimentally, for is about 4/9 times to tetrahedral complexes, (CFSE for octahedral complex)This energy lies in visible region and i.e., why electronic transition are responsible for colour Such transitions are not possible with d0 and d10 configuration.
The d-orbitals, which are stabilised in an octahedral magnetic field, are –
When degenerate d-orbitals of an iSolated atom/ion come under influence of magnetic field of ligands, the degeneracy is lost The two set and are either stabilized or destrabilized depending upon the nature of magnetic fieldIt can be expressed diagrammatically as:
Value of CFSE depends upon nature of ligand and a spectrochemical series has been made experimentally, for is about 4/9 times to tetrahedral complexes, (CFSE for octahedral complex)This energy lies in visible region and i.e., why electronic transition are responsible for colour Such transitions are not possible with d0 and d10 configuration.
The d-orbitals, which are stabilised in an octahedral magnetic field, are –
chemistry-General
chemistry-
hen degenerate d-orbitals of an iSolated atom/ion come under influence of magnetic field of ligands, the degeneracy is lost The two set and are either stabilized or destrabilized depending upon the nature of magnetic fieldIt can be expressed diagrammatically as:
Value of CFSE depends upon nature of ligand and a spectrochemical series has been made experimentally, for is about 4/9 times to tetrahedral complexes, (CFSE for octahedral complex)This energy lies in visible region and i.e., why electronic transition are responsible for colourSuch transitions are not possible with d0 and d10 configuration.
The CFSE for 
complex is 18000 cm–1The for 
will be –
hen degenerate d-orbitals of an iSolated atom/ion come under influence of magnetic field of ligands, the degeneracy is lost The two set and are either stabilized or destrabilized depending upon the nature of magnetic fieldIt can be expressed diagrammatically as:
Value of CFSE depends upon nature of ligand and a spectrochemical series has been made experimentally, for is about 4/9 times to tetrahedral complexes, (CFSE for octahedral complex)This energy lies in visible region and i.e., why electronic transition are responsible for colourSuch transitions are not possible with d0 and d10 configuration.
The CFSE for complex is 18000 cm–1The for will be –
chemistry-General
chemistry-
Double salts are addition compounds which lose their identity in aqueous Solution whereas complexes which are also addition compounds do not lose their identity in aqueous Solution. The coordination compounds show isomerism and find applications in photography, qualitative analysis, metallurgy, water purification and in the treatment of various diseases.
Which of the following statements is incorrect ?
Double salts are addition compounds which lose their identity in aqueous Solution whereas complexes which are also addition compounds do not lose their identity in aqueous Solution. The coordination compounds show isomerism and find applications in photography, qualitative analysis, metallurgy, water purification and in the treatment of various diseases.
Which of the following statements is incorrect ?
chemistry-General
chemistry-
Statement-I : EAN of Fe in ferrocene is 36
Statement-II : 6
e – are co-ordinated by each cyclo pentadien ring with central metal ion.
Statement-I : EAN of Fe in ferrocene is 36
Statement-II : 6 e – are co-ordinated by each cyclo pentadien ring with central metal ion.
chemistry-General
chemistry-
Which of the following ions are optically active?
I) 
II) 
III) 
IV) 
Which of the following ions are optically active?
I)
II)
III)
IV)
chemistry-General
chemistry-
Of the following configurations, the optical isomers are :
I) 
II) 
III) 
IV) 
Of the following configurations, the optical isomers are :
I)
II)
III)
IV)
chemistry-General
chemistry-
The complexes given below show : 
and 
The complexes given below show : and
chemistry-General
maths-
Suppose that the number of telephone calls coming into a telephone exchange between 10 A.M. and 11A.M., say, X1 is a random variable with poison distribution with parameter 2. Similarly the number of calls arriving between 11 A.M. and 12 noon, say X2 also follows a poison distribution with parameter 6. If X1 and X2 are independent, the probability that more than 5 calls come in between 10 A.M. and 12 noon is
Suppose that the number of telephone calls coming into a telephone exchange between 10 A.M. and 11A.M., say, X1 is a random variable with poison distribution with parameter 2. Similarly the number of calls arriving between 11 A.M. and 12 noon, say X2 also follows a poison distribution with parameter 6. If X1 and X2 are independent, the probability that more than 5 calls come in between 10 A.M. and 12 noon is
maths-General
