Biogas is a mixture of gases containing predominantly:
Biogas is a mixture of gases containing predominantly methane, produced by microbial activity.
Question 32 of 455
📘 CLASS XII
The common gas produced during fermentation processes cited in cheesemaking, dough preparation, and beverage production is:
In the examples cited in relation to fermentation of dough, cheese making and production of beverages, the main gas produced was CO2.
Question 33 of 455
📘 CLASS XII
The group of bacteria that grow anaerobically on cellulosic material and produce large amounts of methane are collectively called:
Certain bacteria, which grow anaerobically on cellulosic material, produce large amount of methane along with CO2 and H2. These bacteria are collectively called methanogens.
Question 34 of 455
📘 CLASS XII
An example of a common methanobacterium is:
One such common bacterium that is a methanogen is Methanobacterium.
Question 35 of 455
📘 CLASS XII
Methanogens are commonly found in the anaerobic sludge during sewage treatment and also in which specific anatomical part of cattle?
These bacteria are commonly found in the anaerobic sludge during sewage treatment, and are also present in the rumen (a part of stomach) of cattle.
Question 36 of 455
📘 CLASS XII
The excreta of cattle, rich in methanogens and cellulosic material, is commonly called:
The excreta (dung) of cattle, commonly called gobar, is rich in these bacteria.
Question 37 of 455
📘 CLASS XII
The technology of biogas production was developed in India mainly due to the efforts of IARI and which other organization?
The technology of biogas production was developed in India mainly due to the efforts of Indian Agricultural Research Institute (IARI) and Khadi and Village Industries Commission (KVIC).
Question 38 of 455
📘 CLASS XII
Biocontrol refers to the use of:
Biocontrol refers to the use of biological methods for controlling plant diseases and pests.
Question 39 of 455
📘 CLASS XII
A key belief of the organic farmer regarding pest control is that increased landscape variety furthers health. This concept is referred to as:
A key belief of the organic farmer is that biodiversity furthers health. The more variety a landscape has, the more sustainable it is.
Question 40 of 455
📘 CLASS XII
Which beetle, recognizable by its red and black markings, is useful to get rid of aphids?
The very familiar beetle with red and black markings – the Ladybird, is useful to get rid of aphids.
