Q. Consider the following statements about basic lava:

1. It is rich in iron and magnesium.
2. It has low fluidity.
3. It is commonly found along constructive plate boundaries.
4. It generally forms composite volcanoes.

Which of the above statements is/are correct?
Answer: Only 1 and 3
Notes: Basic lavas, such as basaltic lavas, are rich in iron and magnesium (Statement 1) and are characterized by high fluidity, not low fluidity (Statement 2 incorrect). They are common along constructive (divergent) plate boundaries (Statement 3), and they usually form shield volcanoes rather than composite volcanoes (Statement 4 incorrect).