Engineering Materials
Acidic solution is one which has pH value

Less than 7
pH value has nothing to do with neutral solution
Greater than 7
Equal to 7

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Engineering Materials
Aluminium bronze contains

92.5% aluminium, 4% copper, 2% nickel, and 1.5% Mg
94% aluminium, 4% copper and 0.5% Mn, Mg, Si and Fe
90% magnesium and 9% aluminium with some copper
10% aluminium and 90% copper

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