Chemistry
Fill in the blanks sentence case:
(a) …………… (AgCl/PbCl2) is a white precipitate soluble in excess of NH4OH.
(b) Addition of sodium hydroxide solution to ferrous sulphate solution produces a …………… (green/reddish brown) precipitate which is …………… (soluble/insoluble) in excess of NaOH solution.
(c) Ammonium chloride and sodium chloride can be distinguished by heating them with an …………… (acid/alkali).
(d) Element …………… (Fe/Zn/Cu) produces hydrogen by reacting with both acid as well as alkali.
Answer
(a) AgCl is a white precipitate soluble in excess of NH4OH.
(b) Addition of sodium hydroxide solution to ferrous sulphate solution produces a green precipitate which is insoluble in excess of NaOH solution.
(c) Ammonium chloride and sodium chloride can be distinguished by heating them with an alkali.
(d) Element Zn produces hydrogen by reacting with both acid as well as alkali.
Related Questions
Assertion (A): Oxides of most of the metals are basic in nature.
Reason (R): All metal oxides dissolve in water forming alkalis.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion (A): Zinc oxide reacts with acids as well as bases to form salt and water.
Reason (R): Zinc oxide is amphoteric in nature.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Match the following:
Sodium hydroxide / Ammonium hydroxide solution is added to the solutions containing the ions mentioned in column 1. Match them to the colours of their precipitates in column 2.
Column 1 Column 2 (a) Pb2+ (i) Blue ppt. (b) Fe2+ (ii) Reddish brown ppt. (c) Zn2+ (iii) Dirty green ppt. (d) Fe3+ (iv) Gelatinous white ppt. soluble in excess NaOH (e) Cu2+ (v) White ppt. soluble in excess NH4OH Name:
(a) two coloured metal ions.
(b) a metal that evolves a gas which burns with a pop sound when boiled with alkali solutions.
(c) two bases which are not alkalis but dissolve in strong alkalis.
(d) a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.
(e) a colourless cation not a representative element.
(f) a yellow monoxide that dissolves in hot and concentrated caustic alkali.
(g) a white, insoluble oxide that dissolves when fused with caustic soda or caustic potash.
(h) a compound containing zinc in the anion.