Post Utme Chemistry Past Questions and Answers

Question 1096:

A saturated solution of silver trioxocarbonate (IV), was found to have concentration of \(1.30 \times 10^{5}\) moldm \(^{3}\). The solubility product of trioxocarbonate (IV) is ____________

A. \(8.79 \times 10^{-15}\)
B. \(1.69 \times 10^{-10}\)
C. \(1.82 \times 10^{-10}\)
D. \(9.84 \times 10^{-10}\)

Question 1097:

A Zinc half-cell is connected to an iron half-cell through a salt bridge and both are also connected through a cof per wire. At which electrode is reduction taking place anl which electrode is positively charged?

A. Zinc, zinc
B. Iron, iron
C. Zinc, Iron
D. Iron, Zine

Question 1098:

Which of the following is the difference between an electrolytic cell \(X\) and electrochemical cell \(Y:\)

A. Anode in \(X\) is-ve while anode in \(Y\) is +ve
B. In \(X\), oxidation takes place at the anode while in \(Y\) reduction takes place at the anode
C. In \(X\), anode is positive while in \(Y\) anode is negative
D. In X, chemical energy is converted into electrical energy while in \(Y\) electrical energy is converted into chemical energy

Question 1099:

What mass of bromine will saturate completely \(6.8 g\) of 3-methybut-1-yne \(( H =1 ; C =12 ; Br =80)\)

A. \(16 g\)
B. \(32 g\)
C. \(12 g\)
D. \(24 g\)

Question 1100:

\(100 cm ^{3}\) of oxygen and \(10 cm ^{3}\) of butane measured at room temperature and pressure were mixed and exploded. Determine the volume of the mixture when brought back to the original conditions of measurements.

A. \(125 cm ^{3}\)
B. \(100 cm ^{3}\)
C. \(75 cm ^{3}\)
D. None of these