The elements of group 7 multiple choice questions

The Elements of Group 7

Total marks:0 / 17

1 of 17

Chlorine is added to 2 cm³ of a dilute solution of potassium iodide.

The equation for the reaction between chlorine and iodide ions is

Cl_2(aq) + 2I^-_(aq) ➔ I_2(aq) + 2Cl^-_(aq)

Which statement is correct?

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2 of 17

When solid potassium bromide reacts with concentrated sulfuric acid, which substance does not form?

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3 of 17

Redox reactions occur very frequently in the chemistry of group VII.

Which statement is correct?

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4 of 17

Concentrated sulfuric acid is added to separate solid samples of sodium chloride, sodium bromide and sodium iodide.

With which samples does sulfuric acid act as an oxidising agent?

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5 of 17

Chlorine gas is widely used to treat contaminated water.

Which species present in water when chlorine gas has been added is responsible for killing bacteria?

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6 of 17

Which statement about the reactions of solid halides with concentrated sulfuric acid is correct?

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7 of 17

Why do the boiling points of the halogens increase down the group?

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8 of 17

Y is a hydrogen halide. It reduces sulfuric(VI) acid to hydrogen sulfide, H₂S.

What is Y?

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9 of 17

Which statement about the reactions of halogens with halide ions is correct?

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10 of 17

Which species is not produced by a redox reaction between solid sodium iodide and concentrated sulfuric acid?

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11 of 17

Chlorine reacts with cold, dilute, aqueous sodium hydroxide.

Which is a complete list of the products?

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12 of 17

Some solid sodium halides are reacted with concentrated sulfuric acid.

Which solid sodium halide does not produce a sulfur-containing gas as one of the products?

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13 of 17

Which property increases down group 7?

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14 of 17

Which equation shows a redox reaction that does notoccur?

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15 of 17

What is the best oxidising agent?

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16 of 17

Hydrogen bromide gas reacts with ammonia gas:

HBr + NH₃ ➔ NH₄Br

What would be observed during this reaction?

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17 of 17

Chlorine is added to 2 cm³ of a dilute solution of potassium iodide.

The equation for the reaction between chlorine and iodide ions is

Cl_2(aq) + 2I^-_(aq) ➔ I_2(aq) + 2Cl^-_(aq)

When the reaction is complete, 10 cm³ of cyclohexane (density = 0.79 g cm^-3) is added. The mixture is shaken and left to settle into two layers.

Which description of one of these layers is correct?

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