Description : If I know, say, the mass of precipitated PbCrO4 when I mixed PbCl2 solution (100mL exact) and K2CrO4 (excess), how would I go about calculating the original concentrations of Pb2+ and Cl- in the original PbCl2 solution?
Last Answer : Are you certain that your answer is incorrect? Ksp=[Pb][CrO4], and as you add K2CrO4, you are increasing the concentration of CrO4 in solution, and the equilibrium position must shift such that the ... wrong. I would be very interested in knowing, given that I take my chemistry AP test on Tuesday.
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 : A six co-ordinate complex has the formula `CoCl_(3).5NH_(3).H_(2)O`. Electrical coductance measurements indicate the presence of three ions in one for
Last Answer : A six co-ordinate complex has the formula `CoCl_(3).5NH_(3).H_(2)O`. Electrical coductance measurements indicate the ... complex? A. 3 B. 2 C. 4 D. 1
Description : On adding `AgNO_(3)` solution to a solution of `[Pt(NH_(3))_(3)Cl_(3)]Cl`, the percentage of total chloride ion precipitated is
Last Answer : On adding `AgNO_(3)` solution to a solution of `[Pt(NH_(3))_(3)Cl_(3)]Cl`, the percentage of total ... ion precipitated is A. 100 B. 75 C. 50 D. 25
Description : A solution containing 2.675 g of `CoCl_(3).6NH_(3)` (molar mass `= 267.5 g mol^(-1)`) is passed through a cation exchanger. The chloride ions obtained
Last Answer : A solution containing 2.675 g of `CoCl_(3).6NH_(3)` (molar mass `= 267.5 g mol^(-1)`) is passed through a ... _(3)]` D. `[CoCl(NH_(3))_(5)]Cl_(2)`
Description : Which of the following isomerism is/are shown by the complex `[CoCl_(2)(H_(2)O)_(2)(NH_(3))_(2)]` Br ?
Last Answer : Which of the following isomerism is/are shown by the complex `[CoCl_(2)(H_(2)O)_(2)(NH_(3)) ... ? A. Ionization B. Linkage C. Geometrical D. optical
Description : When concentrated hypo solution is added to `AgNO_(3)` solution a white ppt is formed. With excees of hypo a complex is formed. The oxidation state an
Last Answer : When concentrated hypo solution is added to `AgNO_(3)` solution a white ppt is formed. With excees of hypo a complex is ... 1,2` C. `+3,4` D. `+1,8`
Description : In the ionic equation `2K^(+)BrO_(3)^(-)+12H^(+)+10e^(-)rarrBr_(2)+6H_(2)O+2K^(+)`, the equivalent weight of `KBrO_(3)` will be : (where M = molecular
Last Answer : In the ionic equation `2K^(+)BrO_(3)^(-)+12H^(+)+10e^(-)rarrBr_(2)+6H_(2)O+2K^(+)`, the equivalent weight of ` ... )`) A. M/5 B. M/2 C. M/6 D. M/4
Description : `Na_(2)CO_(3),NaCl, NaNO_(2),Na_(2)SO_(3),NaBr,CH_(3)CO O Na` are separately treated with `AgNO_(3)` solution. In how many cases white precipitate is/
Last Answer : `Na_(2)CO_(3),NaCl, NaNO_(2),Na_(2)SO_(3),NaBr,CH_(3)CO O Na` are separately ... solution. In how many cases white precipitate is/are obtained.
Description : 0.98 g of the metal sulphate was dissolved in water and excess of barium chloride was added. The precipitated barium sulphate weighted 0.95 g. Calcula
Last Answer : 0.98 g of the metal sulphate was dissolved in water and excess of barium chloride was added. ... 95 g. Calculate the equivalent weight of the metal.
Description : The ammonia prepared by treating ammonium sulphate with calcium hydroxide is completely used by `"NiCl"_(2).6H_(2)O` to form a stable coordination com
Last Answer : The ammonia prepared by treating ammonium sulphate with calcium hydroxide is completely used by `"NiCl"_(2).6H_(2)O` ... Cl = 35.5, Ca = 40, Ni = 59)
Description : In the complex `[CoCl_(2)(en)_(2)]Br`, the co-ordination number and oxidation state of cobalt are :
Last Answer : In the complex `[CoCl_(2)(en)_(2)]Br`, the co-ordination number and oxidation state of cobalt are : A. 6 and +3 B. 3 and +3 C. 4 and +2 D. 6 and +1
Description : Co-ordination number of Cr in `CrCl_(3^.)5H_(2)O` is six. The volume of 0.1 N `AgNO_(3)` needed to ppt. the chorine in outer sphere in 200 ml of 0.01
Last Answer : Co-ordination number of Cr in `CrCl_(3^.)5H_(2)O` is six. The volume of 0.1 N `AgNO_(3)` ... of 0.01 M solution of he possible complex es is/are:
Description : A rheostat has 100 turns of a wire of radius 0.4 mm having resistivity `4.2xx10^(-7) Omega`m. The diameter of each turn is 3 cm. What is the maximum v
Last Answer : A rheostat has 100 turns of a wire of radius 0.4 mm having resistivity `4.2xx10^(-7) ... the maximum value of resistance that it can introduce ?
Description : A proton moves at a speed `v = 2xx10^(6) m//s` in a region of constant magnetic field of magnitude B = 0.05 T. The direction of the proton when it ent
Last Answer : A proton moves at a speed `v = 2xx10^(6) m//s` in a region of constant magnetic field of magnitude B = 0.05 T. ... `0.209 m` C. `2.82 m` D. `2.41 m`
Description : When a coordination compound CoCl3.6NH3 is mixed with AgNO3, 3 moles of AgCl are precipitated per mole of the compound. Write (i) Structural formula of the complex (ii) IUPAC name of the complex -Chemistry
Last Answer : i) Complex so formed is: CoCl3.6NH3 + AgNO3 → [Co(NH3)6]Cl3 (ii) IUPAC name of complex is: Hexaamminecobalt (III) chloride
Description : When a co-ordination compound CrCl3.6H2O is mixed with AgNO3, 2 moles of AgCl are precipitated per mole of the compound. Write (i) Structural formula of the complex. (ii) IUPAC name of the complex. -Chemistry
Last Answer : (i) The complex formed on mixing a coordination compound CrCl3.6H2O with AgNO3 is as follows CrCl3.6H2O + AgNO3 → [Cr(H2O5)Cl]Cl2. H2O (ii) Pentaaquachloridochromium (III) chloride monohydrate
Description : Aqueous hypo solution on reaction with aqueous `AgNO_(3)` gives :
Last Answer : Aqueous hypo solution on reaction with aqueous `AgNO_(3)` gives : A. yellow precipitate changing ... C. orange precipitate to blue D. no precipitate
Description : A colouless solution of a compound gives a precipitate with `AgNO_(3)` solution but no precipitate with a solution of `Na_(2)CO_(3)`. The action of co
Last Answer : A colouless solution of a compound gives a precipitate with `AgNO_(3)` solution but no precipitate with a solution ... `CaCl_(2)` C. `Nal` D. `NaBr`
Description : Assertion: A white precipitate is obtained when an aq solution of sodium thiosuphate is treated with `AgNO_(3)` solution and if the precipitate is hea
Last Answer : Assertion: A white precipitate is obtained when an aq solution of sodium thiosuphate is treated with ... I is not correct and Statement-II is correct
Description : A proton of mass `1.67xx10^(-27)` kg charge `1.6xx10^(-19) C` is projected in xy-plane with a speed of `2xx10^(6) m//s` at an angle of `60^(@)` to the
Last Answer : A proton of mass `1.67xx10^(-27)` kg charge `1.6xx10^(-19) C` is projected in xy-plane with a speed ... radius 0.14 m and time period `1.0xx10^(-7)s`
Description : The electron with change `(q=1.6xx10^(-19)C)` moves in an orbit of radius `5xx10^(-11)`m with a speed of `2.2xx10^(6)ms^(-1)`, around an atom. The equ
Last Answer : The electron with change `(q=1.6xx10^(-19)C)` moves in an orbit of radius `5xx10^(-11)`m with a speed of `2. ... -3)A` C. `1.12xx10^(-9)A` D. `1.12A`
Description : If a solution has a concentration of 75g per 100ml what does that mean?
Last Answer : Need answer
Description : The correct statement on the isomerism associated with the following complex ions , `(a) [Ni(H_(2)O)_(5)NH_(3)]^(2+), (b) [Ni(H_(2)O)_(4)(NH_(3))_(2)]
Last Answer : The correct statement on the isomerism associated with the following complex ions , `(a) [Ni(H_( ... a) and (b) show geometrical and optical isomerism
Description : Among the complex ions, `[Co(NH_(2) - CH_(2) - CH_(2) - NH_(2))_(2) Cl_(2)]^(+), [CrCl_(2) (C_(2)O_(4))_(2)]^(3-)` `[Fe(H_(2)O)_(4) (OH)_(2)]^(+), [Fe
Last Answer : Among the complex ions, `[Co(NH_(2) - CH_(2) - CH_(2) - NH_(2))_(2) Cl_(2)]^(+), [CrCl_(2) ... (3)) Cl]^(2+)` and that show(s) cis-trans isomerism is
Description : What happens when freshly precipitated Fe (OH)3 is shaken with a little amount of dilute solution of FeCl3 ?
Last Answer : Ans. It causes peptization leading to the formation of a positively charged sol of Fe (OH)3
Description : How proteins are precipitated from solution?
Last Answer : Any factor which neutralises the charge or re- moves water of hydration will cause precipita- tion of proteins.
Description : Ammonia forms the complex `[Cu(NH_3)_4]^(2+)` with copper ions in alkaline solution but not in acid solution. The reasons for it is:
Last Answer : Ammonia forms the complex `[Cu(NH_3)_4]^(2+)` with copper ions in alkaline solution but not in ... ` ions and `NH_(3)` molecules are not available.
Description : A complex of platinum, ammonia and chloride produces four ions per molecules in the solution. The structure consistent with the observation is :
Last Answer : A complex of platinum, ammonia and chloride produces four ions per molecules in the solution. The structure consistent ... [Pt(NH_(3))_(4)Cl_(2)]Cl`
Description : The volume (in `mL`) of `0.1M Ag NO_(3)` required for complete precipitation of chloride ions present in `30 mL` of `0.01M` solution of `[Cr(H_(2)O)_(
Last Answer : The volume (in `mL`) of `0.1M Ag NO_(3)` required for complete precipitation of chloride ions present ... Cl]Cl_(2)`, as silver chloride is close to:
Description : The IUPAC name of complex `[Cu(en)_(2)(H_(2)O)_(2)]^(22+)`
Last Answer : The IUPAC name of complex `[Cu(en)_(2)(H_(2)O)_(2)]^(22+)` A. ethylene ... C. diaquobisdietyleamineCU(II)ion D. diaquobis(ethylenediamine)cuprate(II)
Description : 25 mL of a solution of `Fe^(2+)` ions was titrated with a solution of the oxidizing agent `Cr_(2)O_(7)^(2-)` . 50 mL of 0.01 M `K_(2)Cr_(2)O_(7)` solu
Last Answer : 25 mL of a solution of `Fe^(2+)` ions was titrated with a solution of the oxidizing agent `Cr_(2)O_ ... is the molarity of the `Fe^(2+)` solution ?
Description : Assertion` :-` Major part of `CO_(2)` is transported in the form of sodium bicarbonate. Reason `:-` 0.3 ml of `CO_(2)` is transported per 100ml of blo
Last Answer : Assertion` :-` Major part of `CO_(2)` is transported in the form of sodium bicarbonate. Reason `: ... False. D. If both Assertion & Reason are false.
Description : The half`-` life periods of four isotopes are give below `:` `(i) 7.6 years` , ` ii. 4000 years` `iii. 6000 years`,`iv. 3.2xx10^(5) years` Which of th
Last Answer : The half`-` life periods of four isotopes are give below `:` `(i) 7.6 years` , ` ii. 4000 years` `iii. ... is most stable ? A. iv B. iii C. ii D. i
Description : A charged particle with a velocity `2xx10^(3) ms^(-1)` passes undeflected through electric field and magnetic fields in mutually perpendicular directi
Last Answer : A charged particle with a velocity `2xx10^(3) ms^(-1)` passes undeflected through electric field and magnetic fields ... 1)` D. `1.33xx10^(3)NC^(-1)`
Description : The magnetic field in a certain region of space is given by `B=8.35 xx10^(-2) hati T.`A proton is shot into the field with velocity `v=(2xx10^(5)hati+
Last Answer : The magnetic field in a certain region of space is given by `B=8.35 xx10^(-2) hati T.`A proton is shot into the ... .136 m` C. `0.157 m` D. `0.236 m`
Description : The reaction of compounf P with `CH_(3)MgBr` (excess) in `(C_(2)H_(5)_(2)O` followed by addition of `H_(2)O` give Q the compound Q on treatment with `
Last Answer : The reaction of compounf P with `CH_(3)MgBr` (excess) in `(C_(2)H_(5)_(2) ... and Friedel-Crafts acylation D. Dehydration and Friedel-Crafts acylation
Last Answer : The reaction of compounf P with `CH_(3)MgBr` (excess) in `(C_(2)H_(5)_(2)O` followed by addition of `H_ ... product S is The product S is A. B. C. D.
Description : `CaOCl_(2)overset(Delta)underset(CoCl_(2))rarr`product, The product are
Last Answer : `CaOCl_(2)overset(Delta)underset(CoCl_(2))rarr`product, The product are A. `CaCl_(2)` B. `O_(2)` C. `Ca(ClO_(3))_(2)` D. All of these
Description : Find the sum of number of geometrical isomers for following complexes. `(a) [CoCl_(2)Br_(2)]^(2-) " " (b) [Rh(en)_(3)]^(3+) " " ( c) [Cr(en)_(2)Br_(2)
Last Answer : Find the sum of number of geometrical isomers for following complexes. `(a) [CoCl_(2)Br_(2)]^(2-) " " (b) [Rh(en ... e) [Co(NH_(3))_(3)(NO_(2))_(3)]`
Description : The number of geometrical isomers for octahedral `[CoCl_(4)(NH_(3))_(2)]^(-)`, square planar `[AuBr_(2)Cl_(2)]^(-)` and `[PtCl_(2)(en)]` are
Last Answer : The number of geometrical isomers for octahedral `[CoCl_(4)(NH_(3))_(2)]^(-)`, square planar `[AuBr_(2)Cl_(2)]^(-) ... are A. 4,2 B. 2,2 C. 3,2 D. 2,3
Description : How many geomatrical isomers are possible for each of the following complexes ? `(a) [Pt(NH_(3))_(2)(SCN)_(2)] " " (b) [CoCl_(2)Br_(2)]^(2-)("tetrahed
Last Answer : How many geomatrical isomers are possible for each of the following complexes ? `(a) [Pt(NH_(3))_(2)(SCN)_(2)] " " ... (+) " " (f) [Rh(en)_(3)]^(3+)`
Description : Arrange the following in increasing order as directed. `(a) (i) [CoCl_(3)(NH_(3))_(3)]," "(ii)[CoCl(NH_(3))_(5)]Cl_(2)," "(iii)[Co(NH_(3))_(6)]Cl_(3),
Last Answer : Arrange the following in increasing order as directed. `(a) (i) [CoCl_(3)(NH_(3))_(3)]," "(ii)[CoCl(NH_ ... -),NH^(3),NO^(3)^(-)`-strength of ligands.
Description : All the metal ions contain `t_(2g)^(6)e_(g)^(0)` configuaration. Which of the following complex will be paramagnetic ?
Last Answer : All the metal ions contain `t_(2g)^(6)e_(g)^(0)` configuaration. Which of the following complex will be paramagnetic ? ... `[Fe(CN)_(5)(O_(2))]^(-5)`
Description : Compound (A) `C_(8)H_(9)Br`, gives a white precipitate when warmed with alcoholic `AgNO_(3)`. Oxidation of (A) gives an acid (B),`C_(8)H_(6)O_(4)`. (B
Last Answer : Compound (A) `C_(8)H_(9)Br`, gives a white precipitate when warmed with alcoholic `AgNO_(3)`. Oxidation of ... . Identify the compound (A) A. B. C. D.
Description : Which one of the hydracid does not form any precipitate with `AgNO_(3)`?
Last Answer : Which one of the hydracid does not form any precipitate with `AgNO_(3)`? A. (A) HF B. (B) HCI C. (C) HBr D. (D) HI
Description : `{:("Column" (I) , "Column"(II)), ((a) "Presence of halogen" , P. HNO_(3)//AgNO_(3)), ((b) "Presence of sulphur" , Q. Na_(2)[Fe(CN)_(5)NO]) , ((c) "Pr
Last Answer : `{:("Column" (I) , "Column"(II)), ((a) "Presence of halogen" , P. HNO_(3)//AgNO_(3)), ((b) "Presence ... (d) "Presence of" P "and" S , S. FeCl_(3)):}`
Description : A 0.22 M solution of lactic acid (pKa 3.9) was found to contain 0.20 M in the dissociated form and 0.02 M undissociated form, the pH of the solution is (A) 2.9 (B) 3.3 (C) 4.9 (D) 5.4
Last Answer : Answer : C
Description : The concentration of sodium ions in the standard WHO oral rehydration solution is: A. 40 m moles/L B. 60 m moles/L C. 90 m moles/L D. 110 m moles/L
Last Answer : C. 90 m moles/L