Ions — task. Chemistry CBSE Live product, Class 9 (2025-26).

Choose the correct answer for the given question from the options.

1. The ions present in \(K_2SO_4\)are:

\(K^{2+}\) and \(SO_4^{2-}\)
\(K^+\) and \(SO_4^{-}\)
\(K^+\) and \(SO_3^{2-}\)
\(K^+\) and \(SO_4^{2-}\)

2. Which of the following compounds contains a polyatomic ion?

Magnesium chloride
Calcium oxide
Aluminium nitrate
Potassium bromide

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