Question

When a volcano ejects acidic lava, eruption is usually __________
A. Light and less violent
B. Soft and less violent
C. Loud and less violent
D. Loud and more violent

Answer 1

Hint: When a volcano is about to eject acidic lava there is explosive pressure which is building up in the magma. They are also considered very dangerous because materials from the eruption can rain down on the settlements.

Complete Answer:
Loud and violent is the kind of eruption when a volcano ejects acidic lava. Lava is basically magma, which is present inside the earth’s surface, when it reaches the earth’s surface. The lava can either be acidic or it can be basic in nature.
Viscous, lighter in colour and higher silica content are the properties of acidic lava. Non-viscous, darker in colour and lower silica content are the properties of basic lava.
Magma are generated because of the internal heat which is present inside the earth and it is erupted in the form of lava through fractures in the crust, this happens usually at temperatures from 800 to 1200 degrees C.
Volcano can be simply defined as a rupture in the earth’s crust. Volcanoes are mostly found in such places where tectonic plates are either diverging or converging. It must be noted that most volcanoes are found underwater.
In the Mid-Atlantic Ridge the volcanoes present are because of the result of divergent tectonic plates. In the Pacific Ring of Fire the volcanoes present are because of the result of the convergent tectonic plates.
Therefore the correct answer is option, ‘D. Loud and more violent’.

Note: Theory of plate tectonics says that the earth’s lithosphere is divided into 16 large plates and numerous smaller plates. The convection happening in the mantle is the reason for the plates to be in motion.