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Which ion has the largest radius?
(a)
(b)
(c)
(d)

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Important Questions on Periodicity
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What happens when sodium is added to water?
I. A gas is evolved.
II. The temperature of the water increases.
III. A clear, colourless solution is formed.

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Which oxides produce an acidic solution when added to water?
I. II. III. .

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Which statement about the elements in group is correct?

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How many of the following oxides are amphoteric?
, , , .

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