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Published on: 13/05/2022
QB365 provides detailed and simple solution for every Book back Questions in class 11 Chemistry Subject. It will helps to get more idea about question pattern in every book back questions with solution.
latest Book back QuestionsDownload Tamil Nadu 11th Standard Chemistry question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Chemistry Test1.
Aerosol cans carry clear warning of heating of the can. Why?
2.
Name two items that can serve as a model for Gay Lussac's law and explain.
3.
Can a Van der Waals gas with a = 0 be liquefied? explain
4.
Give the mathematical expression that relates gas volume and moles.
5.
Why do astronauts have to wear protective suits when they are on the surface of moon?
1.
On heating incineration might take place due to the increase of pressure
2.
The following table gives the pressure of a gas with increasing temperature at constant volume for two cylinders.
| ToC | 32oC | 69oC | 94oC | 130oC |
| P (atm) 50 L container |
0.51 | 0.56 | 0.6 | 0.66 |
| P (atm) 75 L container |
0.34 | 0.37 | 0.40 | 0.44 |
Both the models explain Gay - Lussac's Law. P \(\propto\) T are constant V & n
For 50 L container:
The pressure increases with rise in temperature (at constant volume)
For 75 L container:
The pressure increases with rise in temperature (at constant volume)
3.
For ideal gases, a = 0. The value of 'a' is a measure of the attractive forces between the molecules. There will not be any intermolecular forces of attraction. So it cannot be liquefied.
4.
According to Avogadro's hypothesis: V \(\alpha\) n
\(\therefore \frac{V_{1}}{n_{1}}=\frac{V_{2}}{n_{2}}=\text { constant }\)
V1 & n2 are the volume and number of moles of a gas and V2 & n2 are a different set of values of volume and number of moles of the same gas at same temperature and pressure.
5.
Astronauts must wear space suits filled with air, whenever they leave a space craft and are exposed to the environment of space.
Dangers experienced on moon's space :
1. In space there is no air to breathe and no air pressure.
2. Space is extremely cold and filled with dangerous radiations.
3. If they do not wear space suits, there may be bleeding due to high body pressure.
4. The space suits prevent astronauts from impacts of small bits of space dust.
5. There is no atmosphere on the moon and there are dangers from micro-meteorite impacts.
6. The astronauts are protected from these dangers on wearing space suits.
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