Ncert Exercises & Solutions

Choose the incorrect statement :

1. The Montreal protocol is associated with the control of emission of ozone-depleting substances

2. Methane and carbon dioxide are greenhouse gases

3. Dobson units are used to measure the oxygen content

4. Use of incinerators is crucial to the disposal of hospital waste

Ans. (c) Dobson units used to express the column on the density of trace gases e.g., ozone. On the other hand. oxygen sensors are used to measure the exhaust gas concentration of oxygen.

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