Which of the following statements is correct? |
i.\[Ca{{(OH)}_{2}}\] and \[Mg{{(OH)}_{2}}\] are examples of diacidic base. |
ii. A weak base produces high concentration of hydroxyl ions in solution. |
iii. Alkalis change colourless phenolphthalein to pink. |
iv. All bases decompose on heating to form their respective oxides. |
v. Alkalis react with carbon dioxide to form carbonic acid. |
A) i and iii
B) i, iii and iv
C) ii, iv and v
D) i, iii, iv and v
E) None of these
Correct Answer: A
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