NEET UG BIOLOGY MCQ: ENVIRONMENTAL ISSUES

1 Hard

1 of 1

Understanding +4 | -1

Assertion :

\alpha ,\beta

and

\gamma

rays are emitted by
disintegration of atomic nuclei of radioactive
elements.

Reason : Nuclear fall out is shown by radioactive
elements.

View answer and explanation

Correct option: B

If both Assertion and Reason are true but Reason
is not the correct explanation of Assertion

Option B (If both Assertion and Reason are true but Reason is not the correct explanation of Assertion) is correct because both statements are factually correct, but the reason does not explain the assertion.

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Supreme court of India has ordered the Delhi government to take measures to improve the quality of air. The government started to use _________________ in public fleet. The unfavorable alteration of environment due to human activities is termed as The polluting strength of sewage is usually characterized by its A lake near a village suffered heavy mortality of fishes with in a few days. Consider the following reasons for this.
(i) Lost of urea and phosphate fertilizer were used in the crops in the vicinity
(ii) The area was sprayed with DDT by an aircraft
(iii) The lake water turned green and stinky
(iv) Phytoplankton populations in the lake declined initially thereby greatly reducing photosynthesis. Which of the following is not used for disinfection of drinking water? World most problematic aquatic weed is