Question
In cities sewage needs to be carried to processing unit and acted upon by microbial process. Microbes which can decompose аnу сорpound as well as destroy the pathogens of cholera typhoid are mixed with sewage. They release methane and carbondioxide by decomposition of the carbon compounds present in sewage Phenol oxidising bacteria decompose the xenobiotic chemicals present in sewage.
(1) Where is sewage in cities disposed off?
(2 ) Which disease pathogens are destroyed by microbes?
(3) Which gases are released by decomposition of carbon compounds?
(4) What is the role of Phenol oxidising bacteria?

Answer

(1) In cities sewage needs to be carried to processing unit and acted upon by microbial process.
(2) Microbes can destroy pathogens of Cholera and Typhoid.
(3) Methane and Carbon-dioxide are released by the decomposition of carbon compounds.
(4) Phenol oxidising bacteria decompose the Xenobiotic chemicals present in sewage.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

In, vacuum the velocity of light radiation with different wavelength is the same. But ina material medium, the velocity of different colour radiations is not the same and they travel with different paths. Due to this, the refractive index of the medium is different for different colours. If white beam of light is incident on a glass prism, the angle of refraction for different colours is different. When Sunlight is incident on the refracting surface, then it get splitted into seven coloured spectrum and emerges out. The splitting of light into its component colours is called dispersion.Sir Isaac Newton was the first to use a glass prism to obtain the spectrum of Sunlight. A glass prism is a transparent medium bounded by two plane surfaces inclined at an angle.When white light is dispersed into seven colours by a prism, different colours of light bend through different angles with respect to incident ray. Out of these seven colours, red light bends the least, while violet light bends the most. So, the rays of each colour emerge along different paths and becomes distinct. Hence, we get spectrum of seven different colours.
(i) How does emergent rays appear?
(ii) Write the colours of the Spectrum?
(iii) What is dispersion?
(iv) What is spectrum?
(v) Which light deviates the least and which one deviates the most?
The beautiful phenomenon of the rainbow is a combination of different phenomena dispersion, internal reflection and refraction of light. The rainbow appears in the sky after a rain shower. The water droplets act as small prisms. When sunlight enters the water droplets present in the atmosphere, they refract and disperse the incident Sunlight. Then, they reflect internally inside the droplet and finally again refract it. As a collective effect of all the phenomena, the seven coloured rainbow is observed.
(i) Which three major phenomena are responsible for rainbow?
(ii) How do refraction and dispersion take place?
(iii) Give a diagrammatic representation of Rainbow Production.