Soil Science - Study Mode

[#271] Which one is dominant mineral in sandstone
Correct Answer

(C) Quartz

Explanation

Solution: Quartz is one of the dominant minerals in Sandstone. Most sandstone is composed of quartz or feldspar as they are the most resistant minerals to weathering processes at the Earth’s surface. Quartz is a hard, crystalline mineral composed of silica. The atoms are linked in a continuous framework of silicon-oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO 2 .

[#272] Which one is Non-ferromagnesian mineral?
Correct Answer

(B) Quartz

Explanation

Solution: Quartz is one of the Non- ferromagnesian minerals. The silicate minerals without substantial Fe and Mg in their crystalline structure are non-ferromagnesian minerals. These are generally light coloured than the ferromagnesian silicates. Silica tetrahedral are bonded in three-dimensional frameworks in quartz.

[#273] In an experiment called Ash analysis the P cant material is strongly heated in the presence of oxygen. The residue contains oxides carbonates of about
Correct Answer

(B) Ten elements

Explanation

Solution: In an experiment called Ash analysis, the P cant material is strongly heated in the presence of oxygen. The residue contains oxides carbonates of about ten elements. In analytical chemistry, ashing or ash content determination is the process of mineralization for preconcentration of trace substances before a chemical analysis, such as chromatography or optical analysis, such as spectroscopy.

[#274] More concentrated spray solution can be used in case of
Correct Answer

(A) Low of volume sprayers

Explanation

Solution: A more concentrated spray solution can be used in the case of low-volume sprayers. Low-volume spraying was invented about 1950, particularly for the application of herbicides, in which 10 or 20 gallons, transformed into fine drops, would carry the pesticides. As it is sprayed in low volume thus the concentration of the solution should be high.

[#275] Which lime is referred to as burned lime or quick lime
Correct Answer

(A) CaO

Explanation

Solution: CaO is the lime that is referred to as burned lime or quick lime. It is white, caustic, alkaline, crystalline solid at room temperature. Quicklime specifically applies to the single chemical compound calcium oxide. Quicklime is relatively inexpensive. It is not stable, on cooling, it reacts spontaneously with carbon dioxide from the air.