A colourless inorganic compound (A) impa...

A colourless inorganic compound (A) imparts a green colour to the flame. Its solution gives a white ppt. (B) with `H_(2)SO_(4)`. When heated with `K_(2)Cr_(2)O_(7)` and conc. `H_(2)SO_(4)`, a brown red vapour/gas (C) is formed. The gas/ vapour when passed through aqueous NaOH solution, it turns into a yellow solution (D) which forms yellow precipitate (E) with `CH_(3)COOH` and `(CH_(3)COO)_(2)Pb`. with reference to above information, answe the following questions.
Q. The colourless inorganic compound (A) is:

`Ba(NO_(3))_(2)`

`BaCl_(2)`

`CuCl_(2)`

`CrBr_(3)`

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A colorless inorganic compound impart a green color to flame. It’s solution gives white precipitate with H_2SO_4 , when it is heated with K_2Cr_2O_7 and coc H_2SO_4 a red vapour is evolved. The oxidation nuber of metal in red vapour is :

A colourless inorganic compound (A) imparts a green colour to flame. Its solution does not give white precipitate with H_(2)S . Its solution gives white precipitate with conc. H_(2)SO_(4) which is insoluble in dil. H_(2)SO_(4) . When it is heated with K_(2)Cr_(2)O_(7) and conc. H_(2)SO_(4) , a red gas is evolved. The gas when passed through aqueous NaOH solution turns it Yellow. Identify the compound (A) and give chemical reactions.

Which of the following on heating with K_(2)Cr_(2)O_(7) and conc. H_(2)SO_(4) with organge red color vapours ?

The solid laboratory reagent A gives the following reactions: I. It imparts green colour to the flame. II. Its solution does not give a precipitate on passing H_(2)S. III. When it is heated with solid K_(2)Cr_(2)O_(7) and concentrated H_(2)SO_(4) a red gas is evolved. When this gas is passed into aqueous solution of NaOH it turns yellow: Identify A.

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