Description : When `H_(2)O_(2)` is reacted with `K_(2)Cr_(2)O_(7)" in dilute "H_(2)SO_(4)` and then ether is added. The ether layer gets -colour
Last Answer : When `H_(2)O_(2)` is reacted with `K_(2)Cr_(2)O_(7)" in dilute "H_(2)SO_(4)` and then ether ... layer gets -colour A. Red B. Yellow C. Blue D. Green
Description : `[X]+H_(2)SO_(4) rarr [Y]` a colourless gas with irritating smell `[Y] + K_(2)Cr_(2)O_(7) + H_(2)SO_(4) rarr` green solution `[X]` and `[Y]` are
Last Answer : `[X]+H_(2)SO_(4) rarr [Y]` a colourless gas with irritating smell `[Y] + K_(2)Cr_(2)O_(7) + H_(2)SO_(4) rarr ... 2-), H_(2)S` D. `CO_(3)^(2-), CO_(2)`
Description : When a mixture of solid NaCl, solid `K_(2)Cr_(2)O_(7)` is heated with conc. `H_(2)SO_(4)` orange red vapours are obtained. These are of the compound
Last Answer : When a mixture of solid NaCl, solid `K_(2)Cr_(2)O_(7)` is heated with conc. `H_(2 ... B. chromyl chloride C. chromic chloride D. chromic sulphate
Description : I. `H_(2)S` reduces acidified `KMnO_(4)` to `MnSO_(4)` II. `H_(2)S` reduces acidified `K_(2)Cr_(2)O_(7)` to red colour `Cr_(2)(SO_(4))_(3)` III. `H_(2
Last Answer : I. `H_(2)S` reduces acidified `KMnO_(4)` to `MnSO_(4)` II. `H_(2)S` reduces acidified `K_(2)Cr_(2) ... and III C. only II and III D. I,II,III and IV
Description : A compound 'X' of the formula `C_(3)H_(8)O` gives iodoform test. On oxidation with acidified `K_(2)Cr_(2)O_(7)X` gave Y. Y also gives iodogorm test. T
Last Answer : A compound 'X' of the formula `C_(3)H_(8)O` gives iodoform test. On oxidation with acidified `K_(2)Cr_(2) ... ` D. `CH_(3)COCH_(3), CH_(3)CHOHCH_(3)`
Description : Oxidation number of P in `PO_(4)^(3-)`, of S in `SO_(4)^(2-)` and that of `Cr_(2)O_(7)^(2-)` are respectively
Last Answer : Oxidation number of P in `PO_(4)^(3-)`, of S in `SO_(4)^(2-)` and that of `Cr_(2)O_(7)^(2-)` are ... . `+3, +6 and +5` D. `+5, +3, and +6`
Description : `SO_(2)` reduces acidified `K_(2)Cr_(2)O_(7)` to
Last Answer : `SO_(2)` reduces acidified `K_(2)Cr_(2)O_(7)` to A. `Cr_(2)(SO_(2))_(3)` B. `CrO_(3)` C. `Cr_(2)O_(3)` D. chromium
Description : `K_(2)Cr_(2)O_(7)` react with hydrazins to form product. The oxidation state of Cr in the product will be :-
Last Answer : `K_(2)Cr_(2)O_(7)` react with hydrazins to form product. The oxidation state of Cr in the product will be :- A. `+4` B. `+3` C. `+5` D. `+2`
Description : Which of the following is not formed when `H_(2)S` reacts acidic `K_(2)Cr_(2)O_(7)` solution ?
Last Answer : Which of the following is not formed when `H_(2)S` reacts acidic `K_(2)Cr_(2)O_(7)` solution ? A. `CrSO_(4)` B. ... (4))_(3)` C. `K_(2)SO_(4)` D. `S`
Description : An aqueous solution of a gas (X) gives the following reactions : (i) It decolourizes an acified `K_(2)Cr_(2)O_(7)`. (ii) On boiling with `H_(2)O_(2)`,
Last Answer : An aqueous solution of a gas (X) gives the following reactions : (i) It decolourizes an acified `K_(2)Cr_(2)O_(7)` ... B. `SO_(3)` C. `CO_(2)` D. `CO`
Description : How many mL of 0.3M `K_(2)Cr_(2)O_(7)` (acidic) is required for complete oxidation of 5 mL of 0.2 M `SnC_(2)O_(4)` solution.
Last Answer : How many mL of 0.3M `K_(2)Cr_(2)O_(7)` (acidic) is required for complete oxidation of 5 mL of 0.2 M `SnC_(2)O_(4)` solution.
Description : The oxidation state of Cr in `[Cr(H_(2)O)_(6)]Cl_(3), [Cr(C_(6)H_(6))_(2)], and K_(2)[Cr(CN)_(2)(O)_(2)(O_(2))(NH_(3))]` respectively are :
Last Answer : The oxidation state of Cr in `[Cr(H_(2)O)_(6)]Cl_(3), [Cr(C_(6)H_(6))_(2)], and K_(2)[Cr(CN)_(2)(O)_(2 ... and +4` C. `+3,+4 and +6` D. `+3,+2 and +4`
Description : Three different solutions of oxidising agents `KMnO_(4),K_(2)Cr_(2)O_(7) " and "I_(2)` is titrated separately with 0.158 gm of `Na_(2)S_(2)O_(3)`. If
Last Answer : Three different solutions of oxidising agents `KMnO_(4),K_(2)Cr_(2)O_(7) " and "I_(2)` is ... D. all three oxidising agent can act as self indicator.
Description : Assertion :- In acidic medium, equivalent weight of `K_(2)Cr_(2)O_(7)` is equal to `294//6`. Reason :- In acidic medium, `Cr_(2)O_(7)^(-2)` is reduced
Last Answer : Assertion :- In acidic medium, equivalent weight of `K_(2)Cr_(2)O_(7)` is equal to `294//6`. ... is False. D. If both Assertion & Reason are False.
Description : One mole of acidified `K_(2)Cr_(2)O_(7)` on reaction with excess of KCl will liberate….., moles of `I_(2)`.
Last Answer : One mole of acidified `K_(2)Cr_(2)O_(7)` on reaction with excess of KCl will liberate….., moles of `I_(2)`. A. 6 B. 1 C. 7 D. 3
Description : In the titration of `K_(2)Cr_(2)O_(7)` and ferrous sulphate, following data is obtained: `V_(1)` mL of `K_(2)Cr_(2)O_(7)` solution of molarity `M_(1)`
Last Answer : In the titration of `K_(2)Cr_(2)O_(7)` and ferrous sulphate, following data is obtained: `V_(1)` mL of `K_(2)Cr_ ... V_(2)` D. `M_(1)V_(1)=M_(2)V_(2)`
Description : If equal volumes of `0.1 M KMnO_(4)` and `0.1 M K_(2)Cr_(2)O_(7)` solutions are allowed to oxidise `Fe^(2+)` to `Fe^(3+)` in acidic medium, then `Fe^(
Last Answer : If equal volumes of `0.1 M KMnO_(4)` and `0.1 M K_(2)Cr_(2)O_(7)` solutions are allowed to ... O_(7)` C. equal in both cases D. cannot be determined.
Description : A 100 mL sample of water was treated to convert any iron present to `Fe^(2+)`. Addition of 25 mL of 0.002 M `K_(2)Cr_(2)O_(7)` resulted in the reactio
Last Answer : A 100 mL sample of water was treated to convert any iron present to `Fe^(2+)`. Addition of 25 ... parts per million (ppm) of iron in the water sample.
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 : A gas turns lime water milky and acidified `K_(2)Cr_(2)O_(7)` solution green then gas is :
Last Answer : A gas turns lime water milky and acidified `K_(2)Cr_(2)O_(7)` solution green then gas is : A. `HCl` B. `H_(2)S` C. `SO_(2)` D. `CO_(2)`
Description : `FeCr_(2)`(chromite ) is a good soure of chromium and its compounds like `Na_(2)CrO_(4),Na_(2)Cr_(2)O_(7)` ` P:FeCr_(2)O_(4)+NaOH+airto A+Fe_(2)O_(3)Q
Last Answer : `FeCr_(2)`(chromite ) is a good soure of chromium and its compounds like `Na_(2)CrO_(4),Na_(2)Cr_ ... Dissolving in `H_(2)O` D. Dissolving in dil,HCl
Last Answer : `FeCr_(2)`(chromite ) is a good soure of chromium and its compounds like `Na_(2)CrO_(4),Na_(2)Cr_(2)O_(7)` ... B. C and Al C. C in both D. Al in both
Last Answer : `FeCr_(2)`(chromite ) is a good soure of chromium and its compounds like `Na_(2)CrO_(4),Na_(2)Cr_(2)O_(7)` ` ... D. `Na_(4)[Fe(OH)_(6)],H_(2)SO_(4)`
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 : The oxidation state of `Cr` in `Cr_(2)O_(7)^(2-)` is
Last Answer : The oxidation state of `Cr` in `Cr_(2)O_(7)^(2-)` is A. `+2` B. `+6` C. `-6` D. `-4`
Description : To obtain chromium from chromic oxide `(Cr_(3)O_(3))` the method used is
Last Answer : To obtain chromium from chromic oxide `(Cr_(3)O_(3))` the method used is A. ... monoxide reduction C. Alumino thermic D. Electrolytic reduction
Description : An element `A` in a compound `ABD` has oxidation number `A^(n-)`. It is oxidised by `Cr_(2)O_(7)^(2-)` in acid medium. In the experiment `1.68xx10^(-3
Last Answer : An element `A` in a compound `ABD` has oxidation number `A^(n-)`. It is oxidised by `Cr_(2)O_(7)^(2-)` in acid ... is: A. 3 B. 3-n C. n-3 D. `+n`
Description : Ethyl alcohol on oxidation with acidified `K_(2)Ce_(2)O_(7)` gives
Last Answer : Ethyl alcohol on oxidation with acidified `K_(2)Ce_(2)O_(7)` gives A. `CH_(3)COCH_(3)` B. `HCOOH` C. `CH_(3)COOH` D. `HCHO
Description : How many are redox reaction- `{:((i),K_(4)[Fe (CN)_(6)] + "conc."H_(2)SO_(4) overset(Delta)rarr,(ii),"conc." H_(2)SO_(4) + KCl rarr),((iii),"conc." H_
Last Answer : How many are redox reaction- `{:((i),K_(4)[Fe (CN)_(6)] + "conc."H_(2)SO_(4) overset(Delta)rarr,(ii)," ... ,((ix),"conc." H_(2)SO_(4) + Cu rarr,,):}`
Description : Which of the following is produced during the following reaction ? `CO(g)+H_(2)overset(575K)underset(ZnO,Cr_(2)O_(3))rarr` ……?
Last Answer : Which of the following is produced during the following reaction ? `CO(g)+H_(2)overset(575K)underset(ZnO,Cr_(2)O_ ... 3)COOH` C. `HCOOH` D. `CH_(3)OH`
Description : The oxidation number of oxygen in `K_(2)O, K_(2)O_(2)` and `KO_(2)` are respecitvely
Last Answer : The oxidation number of oxygen in `K_(2)O, K_(2)O_(2)` and `KO_(2)` are respecitvely A. `-2,-1,-(1)/(2)` B. `-( ... 1,-2,-(1)/(2)` D. `-2,-(1)/(2),-1`
Description : Among the following, the number of compounds that can react with `PCl_(5)` to give `POCl_(3)` is `O_(2)`,`CO_(2)`,`SO_(2)`,`H_(2)O`,`H_(2)SO_(4)`,`P_(
Last Answer : Among the following, the number of compounds that can react with `PCl_(5)` to give `POCl_(3)` is `O_(2)`,`CO_(2) ... 2)O`,`H_(2)SO_(4)`,`P_(4)O_(10)`.
Description : The eq. wt. of `Na_(2)S_(2)O_(3)` as reductant in the reaction, `Na_(2)S_(2)O_(3)+H_(2)O+Cl_(2)rarrNa_(2)SO_(4)+2HCl+S` is :
Last Answer : The eq. wt. of `Na_(2)S_(2)O_(3)` as reductant in the reaction, `Na_(2)S_(2)O_(3)+H_(2)O+Cl_(2)rarrNa_(2) ... wt.)/2 C. (Mol. wt.)/6 D. (Mol. wt.)/8
Description : Assertion: Reaction of `SO_(2)` and `H_(2)S` in the presence of `Fe_(2)O_(3)` catalyst gives elemental sulphur. Reason: `SO_(2)` is a reducing agent.
Last Answer : Assertion: Reaction of `SO_(2)` and `H_(2)S` in the presence of `Fe_(2)O_(3)` catalyst gives ... is False. D. If both Assertion & Reason are False.
Description : How many compound(s) or iron (s) can be oxidised by `H_(2)O_(2)` among the following (i) `AsO_(3)^(2)` (ii) `SO_(4)^(2-)` (iii) `Fe_(2) (SO_(4))_(3)`
Last Answer : How many compound(s) or iron (s) can be oxidised by `H_(2)O_(2)` among the following (i) `AsO_(3)^(2)` (ii) ... ` (v) `H_(2)S` (vi) PbS (vii) `O_(3)`
Description : Cold dil. `H_(2)SO_(4)` will completely dissolve : (i) Pb (ii) `Fe_(3)O_(4)` (iii) Fe (iv) Cu (v) Mg (vi) MgO (vii) `CoCO_(3)` (viii) `CuCO_(2)` (ix)
Last Answer : Cold dil. `H_(2)SO_(4)` will completely dissolve : (i) Pb (ii) `Fe_(3)O_(4)` (iii) Fe (iv) Cu (v) ... ) `CoCO_(3)` (viii) `CuCO_(2)` (ix) `SrCO_(3)`
Description : `N_(2)O_(4), (HPO_(2))_(2), H_(2)CO_(3), SO_(2), SO_(3), P_(4)O_(10) H_(2)SO_(4), N_(2)O_(3), HNO_(3), H_(3)PO_(3)`. (a) Among the above compounds, co
Last Answer : `N_(2)O_(4), (HPO_(2))_(2), H_(2)CO_(3), SO_(2), SO_(3), P_(4)O_(10) H_(2)SO_(4), N_(2)O_(3 ... `d pi - p pi` bond are y. Given the answer as `x + y`
Description : Thiosulphate ion `(S_(2)O_(3)^(2-))` on acidification changes to `SO_(2)` along the precipitation of sulpur, `.^(35)S^(32) SO_(3)^(2-) + 2H^(+) to H_(
Last Answer : Thiosulphate ion `(S_(2)O_(3)^(2-))` on acidification changes to `SO_(2)` along the precipitation of sulpur, ` ... ` is in both D. `S^(35)` is in none
Description : Asseration: Number of `S-S` bonds in `H_(2)S_(n)O_(6)` is (n-1). Reason: `H_(2)S_(n)O_(6)` shows `HO_(3)S-underset((n-2))(S)-SO_(3)H`
Last Answer : Asseration: Number of `S-S` bonds in `H_(2)S_(n)O_(6)` is (n-1). Reason: `H_(2)S_(n)O_(6)` shows `HO_(3)S-underset((n-2))(S)-SO_(3)H`
Description : Match the following: Column I(reaction) (a) `H_(2)O_(2)+underset("2moles")(ClSO_(3)H) rarr` (b)`SO_(3)+HClrarr` c) `SO_(3)+HBr rarr` (d) `underset(("c
Last Answer : Match the following: Column I(reaction) (a) `H_(2)O_(2)+underset("2moles")(ClSO_(3) ... chloride t)Hydrogen halide is obtained as the product.
Description : Which of the following compounds can be used for drying of `H_(2)S` gas? I. Conc `H_(2)SO_(4)` II. `P_(4)O_(10)` III. Anhydrous `CaC1_(2)` IV. Anhydro
Last Answer : Which of the following compounds can be used for drying of `H_(2)S` gas? I. Conc `H_(2)SO_(4)` II. ` ... IV B. only I C. only II and III D. only III
Description : How many of the following species can act as both bleaching agent and reducing agent `O_(3),H_(2)O_(2),SO_(2),HCl,SO_(3)`
Last Answer : How many of the following species can act as both bleaching agent and reducing agent `O_(3),H_(2)O_(2),SO_(2),HCl,SO_(3)`
Description : Oxidation state of cobalt in `[Co(NH_(3))_(4)(H_(2)O)Cl]SO_(4)` is
Last Answer : Oxidation state of cobalt in `[Co(NH_(3))_(4)(H_(2)O)Cl]SO_(4)` is
Description : The oxidation states of sulphur in the anions `SO_(3)^(2-), S_(2)O_(4)^(2-)`, and `S_(2)O_(6)^(2-)` follow the order
Last Answer : The oxidation states of sulphur in the anions `SO_(3)^(2-), S_(2)O_(4)^(2-)`, and `S_(2)O_(6)^(2-)` follow ... (6)^(2-)ltS_(2)O_(4)^(2-)ltSO_(3)^(2-)`