TET PRACTICE 2020 - TEST 25

Which of the following wastes cannot be decomposed by bacteria to form compost?

• (a) Kitchen wastes

• (b) Plastic and polythene bags

• (c) dead plants

• (d) bodies of insects living in the soil

If waste materials contaminate the source of drinking water which of the following diseases will spread?

• (a) Scurvy

• (b) Typhoid

• (c) Malaria

• (d) Anaemia

The group of organisms which convert light into food are called

• (a) autotrophs

• (b) heterotrophs

• (c) decomposers

• (d) omnivores

Vermicomposting is done by

• (a) fungus

• (b) bacteria

• (c) worms

• (d) animals

Which one of the following places in our country is a "Cold Desert"?

• (1) Jaisalmer

• (2) Ladakh

• (3) Meghalaya

• (4) Darjeeling

Ozone layer in the upper atmosphere is destroyed by:

• (a) HC1

• (b) smog

• (c) chlorofluorocarbons

• (d) SO

The gas associated with global warming is:

• (a) C02

• (b) H2S

• (c) CH4

• (d) S02

Among the most harmful non-biodegradable waste is:

• (a) cow dung

• (b) plastics

• (c) garbage

• (d) radioactive waste

Medicine of quinine is provided by

• (a) Eucalyptus plant

• (b) aconite plant

• (c) cinchona plant

• (d) money plant

71% of earth surface is covered with:

• (a) land

• (b) air

• (c) water

• (d) coal