A solution containing a group-IV cation gives a precipitate on passing H₂S. A solution of this precipitate in dil.HCl produces a white precipitate with NaOH solution and bluish-white precipitate with basic potassium ferrocyanide. The cation is :
02Easy64×since 2004Q1767
A solution of m-chloronailimne, m-chlorophenol and m-chlorobenzoic acid in ethyal acetate was extracted initially with a saturated solution of NaHCO₃
to give fraction A. The left over organic phase
was extracted with dilute NaoH solution tio give fraction B. The final organiic layer was labelled as
fraction C. Fractions A,B and C, contain respectively :
03Hard64×since 2004Q1769
An inorganic Compound 'X' on treatment with concentrated H₂SO₄ produces brown fumes and gives dark brown ring with FeSO₄ in presence of concentrated H₂SO₄. Also Compound 'X' gives precipitate 'Y', when its solution in dilute HCl is treated with H₂S gas. The precipitate 'Y' on treatment with concentrated HNO₃ followed by excess of NH₄OH further gives deep blue coloured solution, Compound 'X' is :
04Easy64×since 2004Q1770
Cu²⁺ salt reacts with potassium iodide to give
05Easy64×since 2004Q1771
When silver nitrate solution is added to potassium iodide solution then the sol produced is :
06Easy64×since 2004Q1772
To an aqueous solution containing ions such as Al³⁺, Zn²⁺, Ca²⁺, Fe³⁺, Ni²⁺, Ba²⁺ and Cu²⁺ was added conc. HCl, followed by H₂S.
The total number of cations precipitated during this reaction is/are :
07Easy64×since 2004Q1773
A white precipitate was formed when BaCl₂ was added to water extract of an inorganic salt. Further, a gas 'X' with characteristic odour was released when the formed white precipitate was dissolved in dilute HCl. The anion present in the inorganic salt is
08Easy64×since 2004Q1774
During halogen test, sodium fusion extract is boiled with concentrated HNO₃ to
09Easy64×since 2004Q1775
In the flame test of a mixture of salts, a green flame with blue centre was observed. Which one of the following cations may be present?
10Easy64×since 2004Q1776
During the qualitative analysis of salt with cation y²⁺, addition of a reagent (X) to alkaline solution of the salt gives a bright red precipitate. The reagent (X) and the cation (y²⁺) present respectively are :