How is the value of COD compared to BOD?

Write the unit used for measuring ozone thickness.</h2></div>

Which of the following provides nutrients to the seedlings to grow in forests?</h2></div>

Vehicular standard based on European regulation was first introduced in .......... in India.</h2></div>

Find the odd one out:<br> </h2></div>

Chlorofluorocarbons cause<br> </h2></div>

How is the amount of biodegradable organic matter in sewage water estimated?

BOD stands for</h2></div>