Tamil Nadu State Board ( Samacheer Kalvi ) Online Test based on Book Back Questions - 12th Standard Biology - English Medium - Bio Zoology - Environmental Issues

Samacheer Kalvi 12th Biology - Bio Zoology - Environmental Issues - Book Back Questions in English Medium


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Question 1 Of 10

The Hydrochlorofluorocarbons (HCFCs) are the compounds which have the following molecules:


Question 2 Of 10

BOD stands for………………


Question 3 Of 10

E – Wastes are basically…………………..


Question 4 Of 10

UN conference on Sustainable development in 2012 was held at ……………….


Question 5 Of 10

What is the name of the app published by the Central Pollution Control Board that provides updates on AQI


Question 6 Of 10

Question 1.


Question 7 Of 10

The stratosphere is mainly depleted by…………..


Question 8 Of 10

In the E-waste generated by the Mobile Phones, which among the following metal is most abundant?


Question 9 Of 10

The Hydrochlorofluorocarbons (HCFCs) are the compounds which have the following molecules:


Question 10 Of 10

The molecular formula for ozone is………………


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