Select the correct answer from the choice in brackets to complete each sentence.
Alkalis react with metallic __________ (salts/oxides) giving coloured metallic hydroxides.

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Solution

Alkalis react with metallic salts giving coloured metallic hydroxides.
$A B    S a l t s + N a O H ⟶ A O H      M e t a l l i c h y d r o x i d e + N a B$
It's a doble displacement reaction.

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Select the correct answer from the choice in a bracket to complete each sentence.

_________

[K C l O_{2} / K C l O_{3}]

gives potassium chloride and oxygen on heating with manganese dioxide.

Name :

(a) a metallic hydroxide soluble in excess of $N H_{4} O H$ .
(b) a metallic oxide soluble in excess of caustic soda solution. (c) a strong alkali.
(d) a weak alkali.
(e) two colourless metal ions.
(f) two coloured metal ions.
(g) a metal that evolves a gas which burns with a pop sound when boiled with alkali solutions.
(h) two bases which are not alkalis but dissolve in strong alkalis. (i) a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.
(j) a colourless cation, not a representative element.

Q. Rewrite the following by choosing the correct word from each pair in brackets.
Acids are compounds that contain (hydrogen/sulphur) atoms. Sulphuric acid is one such example. It is a (strong/weak) acid. It can be neutralised by (acids/alkalis) to form salts called (sulphites/sulphates).
Many (metals/non-metals) react with acids to give a gas called (hydrogen/oxygen). Acid also react with (carbonates/hydroxides) to give (hydrogen/carbon dioxide) gas.
Phenolphthalein turns (pink/colourless) in acids, while litmus turns (red/blue).

Q. From given metals select the metal which has a hydroxide that reacts with both acids and alkalis.

Q. Name
(a) a metallic hydroxide soluble in excess of NH₄OH.
(b) a metallic oxide soluble in excess of caustic soda solution.
(c) a strong alkali
(d) a weak alkali
(e) two coloured metal ions.
(f) two bases which are not alkalis but dissolve in strong alkalis.
(g) a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.

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Select the correct answer from the choice in brackets to complete each sentence.Alkalis react with metallic __________ (salts/oxides) giving coloured metallic hydroxides.

Alkalis react with metallic salts giving coloured metallic hydroxides.ABSalts+NaOH⟶AOHMetallichydroxide+NaBIt's a doble displacement reaction.

Select the correct answer from the choice in brackets to complete each sentence.
Alkalis react with metallic __________ (salts/oxides) giving coloured metallic hydroxides.

Alkalis react with metallic salts giving coloured metallic hydroxides.
$A B    S a l t s + N a O H ⟶ A O H      M e t a l l i c h y d r o x i d e + N a B$
It's a doble displacement reaction.