state gov APPSC (ఆంధ్రప్రదేశ్) Group 2 (Pre + Mains) Mock Test 2023 General Knowledge Ecology and Environment Environmental pollution
Consider the following:
1. Aluminium silicate
2. Silicon dioxide
3. Carbon dioxide
Which of the above are the composition of Fly Ash?
1
1 and 2 only
2
1 and 3 only
3
2 and 3 only
4
1, 2 and 3