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Earn 100

Which of the following oxide turns red litmus into blue?
(a)
(b)
(c)
(d)

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Important Questions on Metals and Non-Metals
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Which of the following set of reactions will NOT occur?
I.
II.
III.
IV.

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Statement I: Sodium metal reacts violently with water to produce heat and fire.
Statement II: Potassium metal reacts violently with water to form potassium hydroxide and hydrogen gas.
Select the correct answer from the option given below

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The metals which can form amphoteric oxides with oxygen are:

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I. Metal H does not react with dilute .
II. Metal K reacts with warm water.
III. Metal L does not react with water but displaces metal H from its aqueous salt solution.
IV. Metal M reacts with cold water.
Choose the correct decreasing order of reactivity of these metals amongst the following.

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