Chemistry Past Questions and Answers

In the thermite process, aluminium powder is mixed with iron(IIi. oxide to produce ____________<br/>i. Aluminium oxide and molten iron<br/>ii. A highly exothermic reaction used for welding<br/>iii. Iron and aluminium chloride<br/>iv. A mixture of aluminium and iron oxides

The mass of calcium (Ca = 40) deposited by 0.5 Faraday from CaCl₂ is ____________<br/>i. 20 g<br/>ii. 10 g<br/>iii. 40 g<br/>iv. 5 g

The IUPAC name of CH₃CH₂CH(CH₃)CH₂OH is ____________<br/>i. 2-methylbutan-1-ol<br/>ii. 3-methylbutan-1-ol<br/>iii. 2-methylbutanol<br/>iv. Isopentyl alcohol

In the reaction CuO + H₂ → Cu + H₂O, the substance reduced is ____________<br/>i. H₂ which gains oxygen<br/>ii. CuO which loses oxygen<br/>iii. Copper whose oxidation number decreases from +2 to 0<br/>iv. Hydrogen whose oxidation number increases from 0 to +1

The minimum volume of 0.5 M HCl required to react completely with 0.1 moles of NaOH is ____________<br/>i. 50 cm³<br/>ii. 100 cm³<br/>iii. 200 cm³<br/>iv. 0.2 dm³