Name a coloured metallic oxide which dissolves in alkalis to yield colourless solutions. - Chemistry

Name a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.

एक शब्द/वाक्यांश उत्तर

PbO

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Action of Alkalis on Certain Metals

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पाठ 4: Analytical Chemistry - Exercise 1 [पृष्ठ ८५]

पाठ 4 Analytical Chemistry
Exercise 1 | Q 11.7 | पृष्ठ ८५

Choose the most appropriate answer from the following list of oxides which fit the description.

[SO₂, SiO₂, Al₂O₃, MgO, CO, Na₂O]

A basic oxide.

Name two colourless metal ions.

Name two coloured metal ions.

Name the metal hydroxides which are :
(a) Insoluble (b) Soluble in
(i) Caustic soda solution (ii) Ammonium hydroxide solution.

Give two examples of amphoteric hydroxides.

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.

Why the alkali is added drop by drop to the salt solution?

Write balanced equations for a metal that evolves a gas which burns with a pop sound when boiled with alkali solutions.