(b) Which polymer in each of the following pairs is likely to have the higher glass transition temperature. Justify your answer? (0) Polystyrene and polymethyl styrene (ii) Polyvinyl alcohol and polyvinyl chloride
These types of interactions increase the rigidity of polymeric material therefore increase the glass transition temperature. Polyvinyl chloride has higher Tg than polyethylene and Nylon-6 also has higher transition point than polyolefin.
The correct options are. C Moss. D Lichen. At very few places, short grass, moss, lichen and colourful flowering plants are seen in Antarctica.
Also in Antarctic wildlife
There are no trees or shrubs, and only two species of flowering plants are found: Antarctic hair grass (Deschampsia antarctica) and Antarctic pearlwort (Colobanthus quitensis)
This rotting dead matter in the soil is called humus. Below the layer of humus, there is a clear water level which contains dissolved part from the soil. Below water layer, there are layers of clay, sand, gravel and stones.
Gravel is a kind of tiny stones.The amount of gravel present in a good top-soil is very small. In a good top-soil, gravel is present in very small amount.The main rock particles present in the top-soil are sand, clay and silt. So, depending on its composition, a soil can be classified as sandy soil, clayey soil or loamy soil.
