Which is false with regard to magmas ?    Question 10Answer Precipitated by high concentration of electrolytesSols of inorganic substances like Arsenic, iron and platinum They are lyophobic suspensions  They are two phase systems Viscosity is nearly same as that of the solvent

Which statement about igneous rocks is true?Group of answer choicesPyroclastic rocks are types of intrusive rocksGlassy textures are formed when magma cools very slowlySiO2-poor magmas are more explosive than SiO2-rich magmasIntrusive rocks are also known as plutonic rocks

The lowest temperatures and highest SiO2SiO2 contents occur in rhyolitic magma, material so viscous that it commonly does not flow.Group startsTrue or False

Gels are often classified as two-phase while magmas are considered single-phase. True False

The variations in the composition of magmas govern whether eruptions are peaceful or explosive.Group startsTrue or False

Basaltic magma has the lowest viscosity, so more of it reaches the surface; the more viscous rhyolitic magmas are so sluggish that they tend to be trapped deep below the surface where they cool, solidify, and grow into the larger mineral crystals of plutonic rocks.Group startsTrue or False