Ozone Layer Depletion

Q. How is ozone formed in the atmosphere?

Q.

State the chemicals responsible for ozone layer destruction.

Q.

Result of ozone hole is -

1. Greenhouse effect

2. Global warming

3. Acid rain

4. UV rays

Q.

Ozone layer depletion is caused due to ___.

(CFCs/methane/nitrogen oxides/sulphur dioxide)

Q.

Out of the following, which one is an example of a molecule of a compound?

1. Nitrogen molecule

2. Water molecule

3. Oxygen molecule

4. Ozone

Q.

Which of the following is/are the effect(s) of ozone layer depletion?

1. Harmful UV rays entering into the earth.

2. Melting of polar Icecaps.

3. A decrease in sea level

4. Skin- disease

Q.

State two effects of ozone depletion.

Q.

Which of the following chemicals cause ozone layer depletion?

1. Freons

2. Nitric Oxide

3. Carbon Monoxide

4. Carbon Dioxide

Q.

Which radical results in depletion of Ozone layer?

1. Chlorine

2. Fluorine

3. Iodine

4. Bromine

Q.

Select the correct answer :

(a) Excessive release of carbon dioxide in the atmosphere is the cause of

(i) Depletion of ozone

Q.

Describe the methods of saving ozone layer.

Q.

Name the chemical responsible for ozone layer destruction?

Q.

Which reaction causes depletion of Ozone layer?

1. $C{F}_{2}C{l}_2\left(g\right)\stackrel{ultraviolet}{\to }C{F}_{2}Cl\left(g\right)+Cl\left(g\right)$

2. $NO\left(g\right)+O_3\stackrel{}{\to }N{O}_2\left(g\right)+O_2\left(g\right)$

3. $N{O}_2\left(g\right)+O_3\to N{O}_3\left(g\right)+O_2\left(g\right)$

4. $C{O}_2\left(g\right)+O_3\to CO\left(g\right)+2O_2\left(g\right)$

Q. Which compounds are responsible for the depletion of the ozone layer? [2 Marks]

Q.

Ozone hole refers to –

1. Increased concentration of ozone
2. Reduction in the thickness of ozone layer in troposphere
3. Reduction in the thickness of ozone layer in stratosphere
4. Hole in ozone layer

Q.

The _______ rays that strike the Earth result in the depletion of ozone layer.

1. Electromagnetic

2. Visible light

3. Infrared

4. Ultraviolet

Q. What is the advantage of using UV radiation for disinfecting drinking water?​

Q. The molecular formula for ozone is _________

1. $O$
2. $O_2$
3. $O_3$
4. $O_4$

Q. Explain ozone layer, its depletion and effects of ozone depletion.[ 5 Marks ]

Q. Which of the following reaction don't occur in troposphere?

1. $N_2+O_2\to 2NO$
2. $2NO+O_2\to 2N{O}_2$
3. $NO+O_3\to N{O}_2+O_2$
4. $Cl{F}_{2}C{l}_2\to Cl+C{F}_{2}Cl$