Chemistry Past Questions and Answers

What mass of anhydrous sodium trioxocarbonate(IV) is present in \(500 cm ^{2}\) of \(0.1 mol dm m ^{-2}\) of the solution \([ Na =23, C =12, O =16]\)

The oxidation state of oxygen in tetraoxosulphate(IV) acid is ____________

Metals of the first transition series have special properties which are different from those of groups I and II elements because they have partially filled ____________

Separation of different carotenes from carrot root uses a method ____________

\begin{array}{|l|c|c|c|c|}<br/>\hline Solution & W & \(X\) & \(Y\) & \(Z\) \\<br/>\hline \(P h\) & 8 & 12 & 4 & 2 \\<br/>\hline<br/>\end{array}<br/>From the table, which of the solutions W, C, Y and \(Z\) will liberate carbon (IV) oxide from a trioxocarbonate (IV) salt?