94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe

92.5% aluminium, 40% copper, 2% nickel, and 1.5% Mg

10% aluminium and 90% copper

90% magnesium and 9% aluminium with some copper

greater than 7

less than 7

equal to 7

pH value has nothing to do with neutral solution

greater than 7

less than 7

equal to 7

pH value has nothing to do with neutral solution

greater than 7

equal to 7

less than 7

pH value has nothing to do with basic solution

gamma iron (910° to 1400°C), Cu, Ag, Au, Al, Ni, Pb, Pt

Mg, Zn, Ti, Zr, Br, Cd

a iron (below 910°C and between 1400 to 1539°C), W

all of the above