Question
Potassium Nitrate:

Answer

Step -1 : To write the symbols of the radicals (Basic radicals on the left and acidic radicals on the right)
$K NO_3$
Step – 2 : To write the valency below the respective radical.
$\begin{array}{cc}
\mathrm{K} & \mathrm{NO}_{3} \\
1 & 1
\end{array}$
Step – 3: To cross-multiply as shown by arrows the number of radicals.
Maharashtra Board Class 9 Science Solutions Chapter 4 Measurement of Matter 42
Step – 4 : To write down the chemical formula of the compound.
$KNO_3$​​​​​​​
(Potassium nitrate)

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