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प्रश्न
Name two coloured metal ions.
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उत्तर १
Fe2+, Mn2+
उत्तर २
Cupric (Blue) [Cu2+], Ferric (Yellow) [Fe3+]
संबंधित प्रश्न
Name a metallic oxide soluble in excess of caustic soda solution.
Name a strong alkali.
Name two colourless metal ions.
What do you observe when caustic soda solution is added to the following solution: first a little and then in excess : FeCl3
Name: Two bases which are not alkalis but dissolve in strong alkalis.
Fill in the blank.
The hydroxide which is soluble in excess of NaOH is _________ [Zn(OH)2 / Fe(OH)3 / Fe(OH)2].
Fill in the blank.
To distinguish soluble salts of zinc and lead ______ [NaOH / NH4OH]can be used.
When ammonium hydroxide is added to solution B, a pale blue precipitate is formed. This pale blue precipitate dissolves in excess ammonium hydroxide to give an inky blue solution. Name the cation present in solution B. What is the probable colour of solution B?
Write the equation for the following reaction :
Zinc oxide is treated with sodium hydroxide solution.
Write balanced equations for a metal that evolves a gas which burns with a pop sound when boiled with alkali solutions.
