How many litres of pure acid are there in 8 litres of a 20% solution? Choose the correct choice from the following answers:
A) 2 litres
B) 1.4 litres
C) 1 litres
D) 1.6 litres
E) None of these
Explanation :   Quantity of pure acid = 8 × (20/100) = 1.6   Answer : Option 1.6 litres
<result>D</result>
How many litres of pure acid are there in 8 litres of a 20% solution?