Which of the following statements concerning halogens is false?

The formula of chloric acid is HClO3.

Water and oil-based paint are said to be miscible.

State what happens to the:      a) first ionization energy from left to right    b) electronegativity from top to bottom     c) reactivity from top to bottom in group 1    d) atomic radius from left to right   

An atom of U-238 contains:

What is the general name of the groups of elements that contain Mn, Au, Pt, Cu, Fe and Cr?       (1 mark) 

The most reactive metal of the following elements is:

The rotting of food is a change that is:

An isotope has:

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