The carbocation is less stable than
  • a)
  • b)
  • c)
  • d)
Correct answer is option 'C'. Can you explain this answer?

Shivkumar Tandale. answered  •  42 minutes ago
That carbocation is always more stable which has large number of R group ।। given carbocation has 2 R groups which are 2 methyl groups in the given options there is one option which has 3 R groups that is 3 methyl groups so option C) is correct one।।

The reason that the chemical/synthetic fertilisers should be replaced by biofertilisers is that the former:
  • a)
    are source of environmental pollution
  • b)
    are expensive
  • c)
    exhaust the valuable energy resources for their manufacture
  • d)
    all of these
Correct answer is option 'D'. Can you explain this answer?

Sushil Kumar answered  •  2 hours ago
Chemical fertilisers are being used in increasing amounts to increase output in high yielding varieties of crop plants. However, chemical fertilisers cause pollution of water bodies as well as groundwater, besides getting stored in crop plants. They are expensive and also require a lot of energy resources in their manufacture. 

Cyanobacteria are:
  • a)
    heterotrophs
  • b)
    chemotrophs
  • c)
    autotrophs
  • d)
    organotrophs
Correct answer is option 'C'. Can you explain this answer?

Learners Habitat answered  •  2 hours ago
Cyanobacteria are photosynthetic, Gram negative prokaryotes. They have chlorophyll a and are probably major primary producers in the world's oceans. Hence, they are autotrophs.
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