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Question

On treatment of 100 mL 0.1 M Solution of CoCl3.6H2Owith excess AgNO3, 1.2 cross times 1022 ions are precipitated The complex is :

  1. [Co(H2O)4Cl2]Cl.2H2O    
  2. [Co(H2O)3Cl3].3H2O    
  3. [Co(H2O)6]Cl3    
  4. [Co(H2O)5Cl]Cl2.H2O    

The correct answer is: [Co(H2O)5Cl]Cl2.H2O

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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 ?

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In Fe(CO)5, the Fe – C bond possesses :

In Fe(CO)5, the Fe – C bond possesses :

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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 t subscript 2 g end subscript open parentheses d subscript x y end subscript comma d subscript y z end subscript comma d subscript x z end subscript close parentheses and open parentheses d subscript z to the power of 2 end exponent end subscript comma d subscript x to the power of 2 end exponent minus y to the power of 2 end exponent end subscript close parentheses 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 capital delta is about 4/9 times to capital delta subscript 0 end subscript 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 [open square brackets C o F subscript 6 end subscript close square brackets to the power of 3 minus end exponentin terms of parameter Dq is – left parenthesis capital delta equals 10 D q right parenthesis

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 t subscript 2 g end subscript open parentheses d subscript x y end subscript comma d subscript y z end subscript comma d subscript x z end subscript close parentheses and open parentheses d subscript z to the power of 2 end exponent end subscript comma d subscript x to the power of 2 end exponent minus y to the power of 2 end exponent end subscript close parentheses 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 capital delta is about 4/9 times to capital delta subscript 0 end subscript 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 [open square brackets C o F subscript 6 end subscript close square brackets to the power of 3 minus end exponentin terms of parameter Dq is – left parenthesis capital delta equals 10 D q right parenthesis

chemistry-General
parallel
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 t subscript 2 g end subscript open parentheses d subscript x y end subscript comma d subscript y z end subscript comma d subscript x z end subscript close parentheses and open parentheses d subscript z to the power of 2 end exponent end subscript comma d subscript x to the power of 2 end exponent minus y to the power of 2 end exponent end subscript close parentheses 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 capital delta is about 4/9 times to capital delta subscript 0 end subscript 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.
T i subscript left parenthesis a q right parenthesis end subscript superscript 3 plus end superscriptis purple while T i subscript left parenthesis a q right parenthesis end subscript superscript 3 plus end superscriptis 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 t subscript 2 g end subscript open parentheses d subscript x y end subscript comma d subscript y z end subscript comma d subscript x z end subscript close parentheses and open parentheses d subscript z to the power of 2 end exponent end subscript comma d subscript x to the power of 2 end exponent minus y to the power of 2 end exponent end subscript close parentheses 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 capital delta is about 4/9 times to capital delta subscript 0 end subscript 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.
T i subscript left parenthesis a q right parenthesis end subscript superscript 3 plus end superscriptis purple while T i subscript left parenthesis a q right parenthesis end subscript superscript 3 plus end superscriptis colourless because –

chemistry-General
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 t subscript 2 g end subscript open parentheses d subscript x y end subscript comma d subscript y z end subscript comma d subscript x z end subscript close parentheses and open parentheses d subscript z to the power of 2 end exponent end subscript comma d subscript x to the power of 2 end exponent minus y to the power of 2 end exponent end subscript close parentheses 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 capital delta is about 4/9 times to capital delta subscript 0 end subscript 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 t subscript 2 g end subscript open parentheses d subscript x y end subscript comma d subscript y z end subscript comma d subscript x z end subscript close parentheses and open parentheses d subscript z to the power of 2 end exponent end subscript comma d subscript x to the power of 2 end exponent minus y to the power of 2 end exponent end subscript close parentheses 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 capital delta is about 4/9 times to capital delta subscript 0 end subscript 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
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 t subscript 2 g end subscript open parentheses d subscript x y end subscript comma d subscript y z end subscript comma d subscript x z end subscript close parentheses and open parentheses d subscript z to the power of 2 end exponent end subscript comma d subscript x to the power of 2 end exponent minus y to the power of 2 end exponent end subscript close parentheses 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 capital delta is about 4/9 times to capital delta subscript 0 end subscripttetrahedral 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 t subscript 2 g end subscript open parentheses d subscript x y end subscript comma d subscript y z end subscript comma d subscript x z end subscript close parentheses and open parentheses d subscript z to the power of 2 end exponent end subscript comma d subscript x to the power of 2 end exponent minus y to the power of 2 end exponent end subscript close parentheses 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 capital delta is about 4/9 times to capital delta subscript 0 end subscripttetrahedral 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
parallel
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 t subscript 2 g end subscript open parentheses d subscript x y end subscript comma d subscript y z end subscript comma d subscript x z end subscript close parentheses and open parentheses d subscript z to the power of 2 end exponent end subscript comma d subscript x to the power of 2 end exponent minus y to the power of 2 end exponent end subscript close parentheses 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 capital delta is about 4/9 times to capital delta subscript 0 end subscripttetrahedral 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 open square brackets C o C l subscript 6 end subscript close square brackets to the power of 4 minus end exponent complex is 18000 cm–1The capital deltafor open square brackets C o C l subscript 4 end subscript close square brackets to the power of 2 minus end exponent 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 t subscript 2 g end subscript open parentheses d subscript x y end subscript comma d subscript y z end subscript comma d subscript x z end subscript close parentheses and open parentheses d subscript z to the power of 2 end exponent end subscript comma d subscript x to the power of 2 end exponent minus y to the power of 2 end exponent end subscript close parentheses 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 capital delta is about 4/9 times to capital delta subscript 0 end subscripttetrahedral 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 open square brackets C o C l subscript 6 end subscript close square brackets to the power of 4 minus end exponent complex is 18000 cm–1The capital deltafor open square brackets C o C l subscript 4 end subscript close square brackets to the power of 2 minus end exponent will be –

chemistry-General
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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
General
chemistry-

Statement-I : EAN of Fe in ferrocene is 36
Statement-II : 6straight pi e are co-ordinated by each cyclo pentadien ring with central metal ion.

Statement-I : EAN of Fe in ferrocene is 36
Statement-II : 6straight pi e are co-ordinated by each cyclo pentadien ring with central metal ion.

chemistry-General
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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
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
General
chemistry-

The complexes given below show : and 

The complexes given below show : and 

chemistry-General
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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
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The van der Waals constant for gasesblank A comma blank B comma and C are as follows:

Which gas has the highest critical temperature?

The van der Waals constant for gasesblank A comma blank B comma and C are as follows:

Which gas has the highest critical temperature?

chemistry-General
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The distribution of the molecular velocities of gas molecules at any temperature T is shown below. (The plot below is known as Maxwell’s distribution of molecular speeds.)

Where
v is molecular velocity
n is number of molecules having velocity v
Let us define increment N subscript v end subscript, which is equal to the number of molecules between the velocity range v and v plus increment v, given by
increment N subscript v end subscript equals 4 pi N a to the power of 3 end exponent e to the power of negative b v to the power of 2 end exponent end exponent v to the power of 2 end exponent increment v
Where
N is total number of molecules
a equals square root of fraction numerator M subscript 0 end subscript over denominator 2 pi R T end fraction end root and b equals square root of fraction numerator M subscript 0 end subscript over denominator 2 R T end fraction end root
R is universal gas constant
T is temperature of the gas
M subscript 0 end subscript is molecular weight of the gas
SI units of a are

The distribution of the molecular velocities of gas molecules at any temperature T is shown below. (The plot below is known as Maxwell’s distribution of molecular speeds.)

Where
v is molecular velocity
n is number of molecules having velocity v
Let us define increment N subscript v end subscript, which is equal to the number of molecules between the velocity range v and v plus increment v, given by
increment N subscript v end subscript equals 4 pi N a to the power of 3 end exponent e to the power of negative b v to the power of 2 end exponent end exponent v to the power of 2 end exponent increment v
Where
N is total number of molecules
a equals square root of fraction numerator M subscript 0 end subscript over denominator 2 pi R T end fraction end root and b equals square root of fraction numerator M subscript 0 end subscript over denominator 2 R T end fraction end root
R is universal gas constant
T is temperature of the gas
M subscript 0 end subscript is molecular weight of the gas
SI units of a are

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