Description : A coordination complex of type `MX_(2)Y_(2)`[M=metal ion, X,Y=monodentata ligands ], can have either a tetrahedral of a square planar geometry. The ma
Last Answer : A coordination complex of type `MX_(2)Y_(2)`[M=metal ion, X,Y=monodentata ligands ], can have either a tetrahedral ... 2 and 1 C. 1 and 3 D. 3 and 2
Description : Cis-trans isomerism is found in square planar complexes of molecular formula: (a and b are monodentate ligands)
Last Answer : Cis-trans isomerism is found in square planar complexes of molecular formula: (a and b are monodentate ligands) A. ` ... . `Ma_(2)b_(2)` D. `Mab_(3)`
Description : Which of the following terms denotes the polar molecules or negative ions clustered about a central positive ion? w) ligands x) isomers y) complex ions z) dipoles
Last Answer : ANSWER: W -- LIGAND
Description : For the octahedral complexes of `Fe^(3+)` in `SCN^(-)`(thiocyanato-S) and in `CN^(-)` ligands environment, the difference between the spin-only magnet
Last Answer : For the octahedral complexes of `Fe^(3+)` in `SCN^(-)`(thiocyanato-S) and in `CN^(-)` ligands ... the nearest integer) is : [Atomic number of Fe=26]
Description : How many EDTA molecules are required to make an octahedral complex with a `Ca^(2+)` ion?
Last Answer : How many EDTA molecules are required to make an octahedral complex with a `Ca^(2+)` ion? A. Six B. Three C. One D. Two
Description : How many EDTA (lethylendiamine tetra acetic acid) molecules are required to make an octahedral complex with a Ca2+ ion.
Last Answer : EDTA is a hexadentate ligand therefore only one EDTA molecule is required to form octahedral complex.
Description : The most common complex ions have octahedral geometry. What is the coordination number of the central ion in an octahedral complex?
Last Answer : ANSWER: SIX
Description : Nickel `(Z=28)` combines with a uninegative monodentate ligand `X^(-)` to form a paramagnetic complex `[NiX_4]^(2-)`. The number of unpaired electron(
Last Answer : Nickel `(Z=28)` combines with a uninegative monodentate ligand `X^(-)` to form a paramagnetic complex ... C. one, square planar D. two, square planar
Description : An octahedral complex with molecular composition `M.5NH_(3).Cl.SO_(4)` has two isomers. A and B. The solution A gives a white precipitation with `AgNO
Last Answer : An octahedral complex with molecular composition `M.5NH_(3).Cl.SO_(4)` has two isomers ... isomerism C. coordination isomers D. Geometrical isomerism
Description : Sum of denticity of following ligands are Glycinaty ion, Oxalate ion, o-phenathroline, 2,2-bipyridyl, diethylenetriamine, ethylenediamine
Last Answer : Sum of denticity of following ligands are Glycinaty ion, Oxalate ion, o-phenathroline, 2,2-bipyridyl, diethylenetriamine, ethylenediamine
Description : Nickel (Z=28) combines with a uninegative monodenatate ligands to form a diamagnetic complex `[NiL_(4)]^(2-)`. The hybridisation involved and the numb
Last Answer : Nickel (Z=28) combines with a uninegative monodenatate ligands to form a diamagnetic complex `[NiL_(4)]^(2-)`. The ... dsp^(2)`, one D. `sp^(3)`, zero
Description : A complex anion is formed by Osmium ( in some oxidation state ) with ligands ( in proper number so that coordination number of osmium becomes six ). W
Last Answer : A complex anion is formed by Osmium ( in some oxidation state ) with ligands ( in proper number ... ) C. azidopentachloridoosmate(VI) D. None of these
Description : A complex cation is formed by Pt( in some oxidation state ) with ligands ( in proper number so that coordination number of Pt becomes six ). Which of
Last Answer : A complex cation is formed by Pt( in some oxidation state ) with ligands ( in proper number ... (ethylenediamine ) dithiocyanate -S- platinum (IV) ion
Description : Crystal field stabilization energy for high spin `d^4` octahedral complex is
Last Answer : Crystal field stabilization energy for high spin `d^4` octahedral complex is A. `-0.6 Delta_(0)` B. `-1. ... `-1.6Delta_(0)+P` D. `-1.2Delta_(0)`
Description : According to the Crystal Field Theory, the energy of `d_(xy)` orbital is lower than `d_(x^(2)-y^(2))` in an octahedral complex because
Last Answer : According to the Crystal Field Theory, the energy of `d_(xy)` orbital is lower than `d_(x^(2)-y^(2))` ... d_(x^(2)-^(2))` orbital is away the ligands.
Description : An octahedral complex of `Co^(3+)` is diamagnetic . The hybridisation involved in the formation of the complex is :
Last Answer : An octahedral complex of `Co^(3+)` is diamagnetic . The hybridisation involved in the formation of the complex is : A. ... `d^(2)sp^(3)` D. `sp^(3)d`
Description : Addition of excess aqueous ammonia to a pink coloured aqueous solution of `MCl_(2).6H_(2)O(X)` and `NH_(4)Cl` gives an octahedral complex Y in the pre
Last Answer : Addition of excess aqueous ammonia to a pink coloured aqueous solution of `MCl_(2).6H_(2)O(X)` ... solution is pink D. Z is a tetrahedral complex.
Description : How many isomeric forms are possible for the octahedral complex. `[Rh(en)_(2)(NO_(2))(SCN)]^(+)` ?
Last Answer : How many isomeric forms are possible for the octahedral complex. `[Rh(en)_(2)(NO_(2))(SCN)]^(+)` ?
Description : The number of unpaired electrons in `d^(6)`, low spin, octahedral complex is :
Last Answer : The number of unpaired electrons in `d^(6)`, low spin, octahedral complex is : A. 4 B. 2 C. 1 D. 0
Description : The crystl field splitting energy for octahedral complex `(Delta_(0))` and that for tetrahedral complex `(Delta_(1))` rae related as :
Last Answer : The crystl field splitting energy for octahedral complex `(Delta_(0))` and that for tetrahedral complex `(Delta_(1) ... ` D. `Deltat=(9)/(4)Delta_(0)`
Description : In the following ray diagram are given the position of an object O, image I and two lenses `L_(1)` and `L_(2)`. The focal length of `L_(1)` is also gi
Last Answer : In the following ray diagram are given the position of an object O, image I and two lenses `L_(1)` ... also given. Find the focal length of `L_(2)`.
Description : A resistance R is to be measured using a meter bridge. Student chooses the standared resistance S to be `100 Omega`. He finds the null point at `l_(1)
Last Answer : A resistance R is to be measured using a meter bridge. Student chooses the standared resistance ... a more accurate measurement with a meter bridge
Description : The complex ion that does not have d electrons in the metal atom is
Last Answer : The complex ion that does not have d electrons in the metal atom is A. `[MnO_(4)]^(-)` B. `[Co(NH_(3))_(6)]^(3+ ... ]^(3-)` D. `[Cr(H_(2)O)_(6)]^(3+)`
Description : The complex ion . `[M(en)Br_(2)I_(2)]^(-1)`, has two optical isomers. Their correct configurations are:
Last Answer : The complex ion . `[M(en)Br_(2)I_(2)]^(-1)`, has two optical isomers. Their correct configurations are: A. B. C. D.
Description : Monochromatic radiation of wavelength `lambda` is incident on a hydrogen sample in ground state. hydrogen atoms absorb a fraction of light and subsequ
Last Answer : Monochromatic radiation of wavelength `lambda` is incident on a hydrogen sample in ground state. ... different wavelength .Find the value of `lambda`
Description : When considering visible light cured composites, which of the following statements is incorrect? A. An air-inhibited layer is present superficially on the composite. B. The wavelength of the light which affects ... composite. (smaller particles absorb more light) D. B and C E. All are true
Last Answer : E. All are true
Description : I took the GRE four years ago and I need to dig up my score, now. How do I do this?
Last Answer : I looked over the gre site and the only thing I could come up with is this You can recieve your scores over the phone and a social security number is requried, as well as a credit/debit card for the $12 fee.
Description : What hydrogen-like ion has the wavelength difference between the first lines of the Balmer Lyman series equal to `59.3nm`?
Last Answer : What hydrogen-like ion has the wavelength difference between the first lines of the Balmer Lyman series equal to `59.3nm`?
Description : A positive ion having just one electron ejected it if a photon of wavelength `228Å` or lose is absorbed by it identify the ion
Last Answer : A positive ion having just one electron ejected it if a photon of wavelength `228Å` or lose is absorbed by it identify the ion
Description : Sodium vapour lamps glow with yellow colour. This is due to - (1) sublimation of sodium to emit yellow colour (2) the emission of excess energy absorbed by sodium atoms, in the yellow region of the ... (3) the low ionisation energy of sodium (4) its ability to absorb all other colours except yellow
Last Answer : (2) the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum Explanation: Sodium Vapour Lamps glow with yellow colour due to the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum.
Description : Transition ions absorb light in – (1) infrared region (2) ultraviolet region (3) microwave region (4) visible region
Last Answer : (4) visible region Explanation: Transition metal ions have an incomplete set of 3d electrons. Changes in the energy of these electrons correspond to the energy of visible light. The absorption of visible light by these ions lend colour to gems.
Description : Sodium vapour lamps glow with yellow colour. This is due to (1) sublimation of sodium to emit yellow colour (2) the emission of excess energy absorbed by sodium atoms, in the yellow region of the ... (3) the low ionisation energy of sodium (4) its ability to absorb all other colours except yellow
Last Answer : the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum
Description : Transition ions absorb light in : (1) infrared region (2) ultraviolet region (3) microwave region (4) visible region
Last Answer : visible region
Description : Give two examples of ligands which form coordination compounds useful in analytical chemistry. -Chemistry
Last Answer : Examples : (i) EDTA (Ethylene diamine tetra-acetic acid) (ii) Dimethyl glyoxime (DMG)
Description : Pseudo halides are anions having resemblance with halide ions. Group I metals can form salts with pseudo halides. Pseudo halogens can acts as ligands
Last Answer : Pseudo halides are anions having resemblance with halide ions. Group I metals can form salts with pseudo halides. ... and C black D. `Na(CN)_2^-`
Last Answer : Pseudo halides are anions having resemblance with halide ions. Group I metals can form salts with pseudo halides. ... NaBr C. (C) NaF D. (D) Nal
Last Answer : Pseudo halides are anions having resemblance with halide ions. Group I metals can form salts with pseudo halides. ... . H_2O` D. (D) None of these
Last Answer : Pseudo halides are anions having resemblance with halide ions. Group I metals can form salts with pseudo halides ... . `NaCN, NaOCN` D. `HCOONa, NH_3`
Description : Write the name of the following ligands and classify their denticity (a) o- phen (b) `NOS^(-)`
Last Answer : Write the name of the following ligands and classify their denticity (a) o- phen (b) `NOS^(-)`
Description : In the compound lithiumtetrahydroaluminate, the ligands is :
Last Answer : In the compound lithiumtetrahydroaluminate, the ligands is : A. `H^(+)` B. H C. `H^(-)` D. none of these
Description : Ligands contains :
Last Answer : Ligands contains : A. Ione pair of electrons B. incomplete octet C. unpaired electrons D. shared pair of electrons.
Description : Among the following species the one which causes the highest `CFSE, Delta_(0)` as a ligands is :
Last Answer : Among the following species the one which causes the highest `CFSE, Delta_(0)` as a ligands is : A. `CN^(-)` B. `NH_(3)` C. `F^(-)` D. CO
Description : Ligands are :
Last Answer : Ligands are : A. Lewis acids B. Lewis bases C. neutral D. none
Description : What is meant by unidentate , didentate and ambidentate ligands . give two example of each
Last Answer : When a legend is bound to a metal ion through a single diner atom, is said to be unidentate for ex- Cl- , H2O & NH3 When a legande can bound through two donor atoms as in H2N ... is said to be polydentate ligand which can ligate through two different atoms is called ambidenate ligand Ex-NO2, SCN
Description : Pick out the wrong statement. (A) Biological oxygen demand (B.O.D.) value of a sewerage sample is always lower than its chemical oxygen demand (C.O.D.) value (B) Environmental pollution by ... in but does not allow the short wavelength infra red radiation to escape out of the earth's atmosphere
Last Answer : (D) The characteristic of a green house body is that it allows the long wavelength incoming solar radiation to come in but does not allow the short wavelength infra red radiation to escape out of the earth's atmosphere
Description : Which complex ion is formed when undecomposed AgBr is washed with hypo solution in photography? (Comptt. All India 2013) -Chemistry
Last Answer : Sodium dithiosulphato argentate (I) complex is formed
Description : IUPAC name of complex ion `[CrCl_(2)(ox)_(2)]^(3-)` is
Last Answer : IUPAC name of complex ion `[CrCl_(2)(ox)_(2)]^(3-)` is A. ... ) C. dichorodioxalatochromate(III) D. bisoxalaeodichlorochromate (III)
Description : The oxidation number and co-ordination number of chromium in complex ion `[Cr(C_(2)O_(4))_(2)(H_(2)O)_(2)]^(-)` are
Last Answer : The oxidation number and co-ordination number of chromium in complex ion `[Cr(C_(2)O_(4))_(2)(H_(2)O)_(2)]^(-)` are A. 3,6 B. 2,6 C. 2,8 D. 3,8
Description : Which of the following complex ion is not expected to absob visible light ?
Last Answer : Which of the following complex ion is not expected to absob visible light ? A. `[Ni(H_(2)O)_(6)]^(2+)` B. `[Zn( ... (3+)` D. `[Fe(H_(2)O)_(6)]^(2+)`
Description : Which molecule/ion among the following cannot act as a ligand in complex compounds ?
Last Answer : Which molecule/ion among the following cannot act as a ligand in complex compounds ? A. `CH_(4)` B. `CN^(-)` C. `Br^(-)` D. `CO`