Related InterviewSolutions

• If in solution containing `Cl^(-) & Bt^(-)` ions, `AgNO_(3)` is added then initial precipitate of which colour will be formed ?
• The ion most difficult to removes as precipitate isA. `Ag^(+)`B. `NH_(4)^(+)`C. `Fe^(+2)`D. `Co^(+2)`
• If silver nitrate solution is added to a salt solution and a yellow precipitate is obtained the salt may containA. `Br^(-)`B. `l^(-)`C. `Cl^(-)`D. `F^(-)`
• In the fifth group, `(NH_4)_2 CO_3` is added to precipitate out the carbonates, we do not add `Na_2 CO_3` becauseA. `MgCO_(3)` is soluble in `Na_(2)CO_(3)`B. `Na_(2)CO_(3)` increases the solubility of fifth group carbonatesC. `MgCO_(3)` will also be precipitated out in fifth groupD. `Na_(2)CO_(3)` will decrease the solubility product of `MgCO_(3)`
• The compound responsible for deep yellow colour isA. `FeCl_(3)`B. `CoCl_(3)`C. `MnCl_(2)`D. `NaCl`
• The compound responsible for red colour isA. `Fe(SCN)_(3)`B. `Co(CNS)_(6)^(-4)`C. `Mn(CNS)_(6)^(-4)`D. `NaSCN`
• A black mineral (A) on heating in presence of air gives a gas (B). The mineral (A) on reaction with dilute `H_(2)SO_(4)` gives a gas (C) and a solution of a compound (D) on passing the gas (C) into an aqueous solution of (B), a white turbidity is obtained. The aqueous solution of (D) on reaction with potassium ferricyanide gives a blue compound (E). Identify (A) to (E) and give chemical equations for the reaction involved.
• The compound A may beA. `FeSO_(4)`B. `CoSO_(4)`C. `MnSO_(4)`D. `Na_(2)S_(2)O_(7)`
• A compound (X) on heating with an excess of NaOH solution gives a gas (Y) which gives white fumes on exposure to HCl. Heating is continued to expel the gas completely. The resultant alkaline solution again liberates the same gas (Y) when heated with Zn powder. However, when the compound (X) is heated alone does not give nitrogen. Identify (X) and (Y).
• Which of the following compound will not turn black on adding `NH_(4)OH` to it ?A. `ZnSO_(4)`B. `Hg_(2)Cl_(2)`C. `AgCl`D. `CuSO_(4)`