Question

Name any 4 toxic material whose compound are present in industrial wastes.

Answer 1

5/x + 1/y = 2
6/x - 3/y = 1
Let 1/x = a and 1/y = be
We get
5a + b = 2
b = 2 - 5a ....eq (1)
6a - 3b = 1
6a - 3(2 - 5a) = 1 ....{by eq(1)}
6a - 6 + 15a = 1
a = 1/3
b = 1/3
So x = 3 and y = 3

Answer 2

1. Ethylene oxide
2. Formaldehyde
3. Cadmium
4. Toluene