Identify the four layers of atmosphere as per the temperature range mentioned and arrange them in a sequence of $-60 °\mathrm{C}$ to $-15 °\mathrm{C}$, $17 °\mathrm{C}$ to$-51°\mathrm{C}$ , $-15 °\mathrm{C}$  to $-120 °\mathrm{C}$ and maximising up to $2000 °\mathrm{C}$.

1. Troposphere
2. Stratosphere
3. Mesosphere
4. Exosphere
5. Thermosphere

A list of four different substances is given below The methods of preparation of the substances are also given. Arrange the methods of preparation in the order of the substances given. 
(i) ${\mathrm{O}}_2$
(ii) ${\mathrm{CO}}_2$
(iii) ${\mathrm{SO}}_2$
(iv) ${\mathrm{P}}_2{\mathrm{O}}_5$ 

1. Burning of a non-metal produces dense white fumes.
2. Burning of a non-metal with sparkles and crackling sound.
3. Heating of one of the binary compounds of hydrogen.
4. Burning of a non-metal with a brilliant blue flame.

Identify the layers of atmosphere as per the activities mentioned and arrange them in a sequence.

Burning up of meteorites, flying of aeroplanes, reflection of radio waves, absorption of harmful ionising radiations and occurrence of most of the weather phenomena.

1. Troposphere
2. Stratosphere
3. Mesosphere
4. Ionosphere
5. Magnetosphere

Fountain ink pen leaks at higher altitudes. It is due to: