Reactions of transition metal elements multiple choice questions

Reactions of Transition Metal Elements

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Gaseous reactants attach to the catalytic surface by the process of...

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Iodide ions are oxidised by peroxodisulfate ions in aqueous solution:

2I^- + S₂O₈^2- ➔ I₂ + 2SO₄^2-

This reaction is catalysed by Fe²⁺ ions. This catalysis is effective because

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3 of 11

The reaction below can be catalysed by either Fe²⁺ ions or Fe³⁺ ions.

S₂O₈^2-_(aq) + 2I^-_{(aq) ➔} 2SO₄^2-_(aq) + I_2(aq)

This is because

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Copper(II) ions form an aqueous complex ion, X, with chloride ions.

Which statement about X is true?

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Which of the following reagents would enable you to separate iron(III) hydroxide from a mixture of iron(III) hydroxide and copper(II) hydroxide?

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The compound 1,2-diaminoethane, H₂NCH₂CH₂NH₂, is a bidentate ligand; in formulae, it is usually abbreviated to ‘en’.

When 1,2-diaminoethane is added to [Co(NH₃)₆]²⁺ in aqueous solution, [Co(en)₃]²⁺ is formed.

What is the best explanation for this?

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7 of 11

The reaction:

[Fe(H₂O)₆]²⁺ + H₂O ➔ [Fe(H₂O)₅(OH)]⁺ + H₃O⁺

is an example of

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8 of 11

Hydrated crystals of a compound have the formula CrCl₃(H₂O)₆.

A solution containing one mole of the compound reacts with two moles of silver nitrate to form two moles of silver chloride.

The complex chromium ion in the compound is most likely to be

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Which of the following is a correct statement about the test for Fe²⁺ ions in solution?

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Aqueous Cr³⁺ ions are reacted with an excess of aqueous sodium hydroxide.

Which product is formed?

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What is observed when concentrated hydrochloric acid is added to an aqueous solution of CuSO₄ until no further change occurs?

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