Two elements are mixed, and react with evolution of heat and light. The reaction may be classified as:

The statement that best defines the alkali metals is:

The burning of natural gas is a change that is:

Balance each of the following equations:  (3 marks each) a) H2SO4 + Al(OH)3 → Al2(SO4)3 + H2O b) Ca3P2 + H2O → PH3 + Ca(OH)2 c) C3H7OH + O2 → CO2 + H2O d) Cl2 + CrBr3 → Br2 + CrCl3

HCl(aq) represents liquid hydrochloric acid.

Consider the graph of the quadratic function . Determine the intervals where the function is increasing and decreasing.    

Select the balanced equation.

Identify the toolkit function .

The combustion of hydrocarbons always result in the formation of water.  State 3 other types of chemical reactions that may result in the formation of water.        (3 marks)

CrO is a metal oxide.