RSUT Chemistry 2012/2013 Past Questions

The oxidation states of nitrogen in ammonium nitrate are

Which of these reagents can confirm the presence of a triple bond?

An excess 0.10mol/dm³ HCI was poured into a big beaker containing 2g of limestone. The unreacted acid required 25cm³ of 0.10mol/dm³ potassium carbonate to neutralize it. What was the original volume of the acid? [Ca = 40, C = 12,0 = 16]

²²⁶₈₈Ra ↠ ^x₈₆ + &alpha-particle;

What is the value of x in the nuclear reaction?

In the electrolysis of copper (II) sulphate using copper electrodes, the processes that occur at the anode and cathode respectively are

Burning of 0.46g of ethanol produced heat that raised the temperature of 100g of water by 30°C. Calculate the heat of combustion of ethanol: C₂H₅OH. (C = 12, H = 1, 0 = 16]

When chlorine is bubbled into potassium iodine solution:

PCl_5(g) → PCl_3g + Cl_2g.

In the reaction above, an increase in pressure will

A saturated solution of silver trioxocarbonate (IV), was found to have concentration of 1.30 x 10^-5 moldm^-3. The soludility product of the trioxocarbonate (IV) is

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