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IIB (arsenic group ) sulphides are solut...

IIB (arsenic group ) sulphides are solution in `YAS` if cone `HCI` isadded to this soluble portion colour red ppt are formed Write reaction

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To solve the question regarding the reactions of IIB (arsenic group) sulfides with concentrated hydrochloric acid (HCl), we will break down the process step by step. ### Step-by-Step Solution: 1. **Understanding the Solubility of Arsenic Group Sulfides**: - The arsenic group sulfides, such as ammonium arsenic sulfide (NH4)3AsS4 and ammonium tin sulfide (NH4)2SnS3, are soluble in concentrated hydrochloric acid (HCl). 2. **Reaction of Ammonium Arsenic Sulfide with HCl**: ...
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A colourless (A) when place into water a heavy white turbidly of (B) solid (A) gives a close solution in conesolution in cone HCI when HCI solution is added to clear solution water ,(B) forms again (B) dissolves in dilute HCI . When H_(2)S is passed through a sespension of (A) or (B), a black precipitate (C ) forms , (C ) is insolves in yellow ammonium sulphide (NH_(4))_(2)S , cone H_(2)SO_(4) added to solid (A) liberates gas (D) gas (D) is water soluble and gives white precipitate with mercuric salts (E ) and not mercuric salt .The black precipitate (C ) dissolves in HNO_(3), (1,1) to give a solution to which H_(2)SO_(4) is added followed by addition of NH_(4)OH when a white precipitate (F) is formed (E ) gives a black ppt , (G) with solution of sodium stannite. Compound (C ) is also formed by the following reaction

A colourless (A) when place into water a heavy white turbidly of (B) solid (A) gives a close solution in conesolution in cone HCI when HCI solution is added to clear solution water ,(B) forms again (B) dissolves in dilute HCI . When H_(2)S is passed through a sespension of (A) or (B), a black precipitate (C ) forms , (C ) is insolves in yellow ammonium sulphide (NH_(4))_(2)S , cone H_(2)SO_(4) added to solid (A) liberates gas (D) gas (D) is water soluble and gives white precipitate with mercuric salts (E ) and not mercuric salt .The black precipitate (C ) dissolves in HNO_(3), (1,1) to give a solution to which H_(2)SO_(4) is added followed by addition of NH_(4)OH when a white precipitate (F) is formed (E ) gives a black ppt , (G) with solution of sodium stannite. Compound (B ) is not soluble in

A colourless (A) when place into water a heavy white turbidly of (B) solid (A) gives a close solution in conesolution in cone HCI when HCI solution is added to clear solution water ,(B) forms again (B) dissolves in dilute HCI . When H_(2)S is passed through a sespension of (A) or (B), a black precipitate (C ) forms , (C ) is insolves in yellow ammonium sulphide (NH_(4))_(2)S , cone H_(2)SO_(4) added to solid (A) liberates gas (D) gas (D) is water soluble and gives white precipitate with mercuric salts (E ) and not mercuric salt .The black precipitate (C ) dissolves in HNO_(3), (1,1) to give a solution to which H_(2)SO_(4) is added followed by addition of NH_(4)OH when a white precipitate (F) is formed (E ) gives a black ppt , (G) with solution of sodium stannite. When compound (E ) reacts with NH_(4)OH , then product is a

Identify the cation (positive ion) and anion (negative ion) in - 'A','B' & 'C'. Also identify P, Q, R, S, T, U, V, W. a] Substance 'A' is water soluble and gives a curdy white precipitate 'P' with silver nitrate solution. 'P' is soluble in ammonium hydroxide but insoluble in dil. HNO_3 . Substance 'A' reacts with ammonium hydroxide solution to give a white precipitate ' soluble in excess of NH_4OH . b] A solution of substance 'B' is added to barium chloride solution. A white ppt. 'R' is formed, insoluble in dil. HCl or HNO_3 . A dirty green ppt. 'S' is formed on addition of ammonium hydroxide to a solution of 'B' and the precipitate is insoluble in excess of ammonium hydroxide. c] Substance 'C' is a coloured, crystalline salt which on heating decomposes leaving a black residue 'T'. On addition of copper turnings and conc. H_2SO_4 to 'C' a coloured acidic gas 'U' is evolved on heating. A solution of'C' is added to NaOH soln. until in excess. A pale blue ppt. 'P' is obtained insoluble in excess of NaOH A solution of 'C' is then added to NH_4OH soln. in excess to give an inky blue solution 'V'. A solution of 'C' is warmed and hydrogen sulphide gas is passed through it. A black ppt. 'W' appears.

Anhydrous white solid (A) on addition of potassium iodine solution gave a brown precipitate which turned white (B) on addition of excees of hypo solution. When potasium cyanide is added to an aqeous Solution of (A) a white precipitate is formed which then dissolved in excess forming (C ) A Solution (%) of (A) on adding to a solution of white portion of egg produced violet colouration in alkaline medium (i.e) in presence of NaOH) identify compound (A) and explain the reactions.

Write a balanced chemical equation for each of the following reactions and also classify them. (a) Lead acetate solution is treated with dilute hydrochloric acid to form lead chloride and acetic acid solution. (b) A piece of sodium metal is added to absolute ethanol to form sodim ethoxide and hydrogen gas. (c) Iron (III) oxide on heating with carbon monoxide gas reacts to form solid iron and liberates carbon dioxide gas. (d) Hydrogen sulphide gas reacts with oxygen gas to form solid sulphur and liquid water.

Salts M, N, O, P and Q undergo reactiom (i) to (v) respectively. Identify the cation present in these salts on the basis of these reaction. Tabulate your answer in the format given below. 1. When sodium hydroxide solution is added to the salt M, and heated strongly a colourless gas with a pungent smell is evolved which turm red litmus paper blue and gives dense white fumes with a moist glass rod with hydrochloric acid. 2. Addition of dilute hydrochloric acid to a solution of N gives a thick white precipitate which is soluble in hot water. 3. When ammonium hydroxide solution is added to the solution of 0 a light blue precipitate is obtained which is soluble in excess of ammonium hydroxide to form an inteme deep blue solution. 4. When ammonium hydroxide solution is added to the solution of P reddish brown (mustard colour) precipitate is obtained which ,is insoluble even in the excess of ammonium hydroxide solution. 5. When sodium hydroxide solution is added to the solution of Q a which coloured gelatinous precipitate is obtained which is soluble in excess of sodium hydroxide to form a clear solution

A black coloured compound (A) on reaction with dilute H_(2)SO_(4) gives a gas (B) which on passing in a solution of an acid ( C) gives a white turbidity (D) .Gas (B) when passed in an acidified solution of a compound (E) gives a precipitate (F) soluble in dilute HNO_(3) .After boiling this solution when an excess of NH_(4)OH is added a intense blue coloured compound (G) is formed. To this solution on addition of acetic acid and aqueous K_(4)[Fe(CN)_(6)] a chocolate brown precipitate (H) is obtained.On addition of an aqueous solution of BaCl_(2) to an aqueous solution of (E) a white precipitate insoluble in dilute HCl is obtained. Identify the compounds from (A) to (H) .

A sulphide of a metal (M) with formula MS is white coloured ppt which is soluble in acidic solution (PH lt 6) . Metal cation M is:

When potassium iodide solution is added to a solution of lead (II) nitrate in a test tube, a precipitate is formed. (a) What is the colour of this precipitate? Name the compound precipitated. (b) Write the balanced chemical equation for this rection. (c) List two types of reactions in which this reaction can be placed.

CENGAGE CHEMISTRY ENGLISH-QUALITATIVE INORGANIC SALT ANALYSIS-Viva Voce Questions And Part-C (Analysis Of Cations)
  1. IIB (arsenic group ) sulphides are solution in YAS if cone HCI isadded...

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  2. Why is it necessary to prepare original solution for the detection of ...

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  3. Why do we not prefer to prepare original solution of cations in conc....

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  4. What is solubility product? Explain its importance in qualitative anal...

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  5. What is the basis of classification of cations into different group ?

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  6. Why are only Pb^(2+),Ag^(o+) and Hg(2)^(2+) ions precipitated in group...

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  7. Why is lead placed in group I as well in II?

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  8. Is it necessary to acidify a solution before group II cations are prec...

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  9. Give the reason for the formation of a light yellow or white ppt. in t...

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  10. Why do we Prefer HCl for preparing solution of cations?

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  11. Is it advisable to use conc. HCI in place of dilute HCI for preparing ...

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  12. Why is it essential to boil off H(2)S gas before proceeding to group I...

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  13. Can the solution be acidified with HNO(3) in group II before passing H...

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  14. What can it be, if the precipitate of group I is soluble in hot water ...

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  15. Why do we not prefer to prepare original solution of cations in conc....

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  16. Group I filtrate is made moderately acidic before proceeding to group ...

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  17. Why do we add excess of NH(4)Cl and NH(4)OH in the precipitation of gr...

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  18. Why do we add excess of NH(4)Cl and NH(4)OH in the precipitation of gr...

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  19. Why is it essential to oxidise ferrous salt to ferric salt in group II...

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  20. Can NH(4)Cl be replaced by any other ammonium salt for the precipitati...

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  21. How will you distinguish between ferrous and ferric salts?

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