Equilibrium
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- True
- False
Explain the term phase transition point with an example.
Solid carbon dioxide is used for the refrigeration of food. Justify the statement.
N2(g)+3H2(g)⇌2NH(g)+Heat
What is the effect of the increase in temperature on this equilibrium reaction?
- Equilibrium is unaltered
- Formation of ammonia is favored
- Equilibrium is shifted to the left
- Reaction rate does not change
- not opposed
- opposed
- rapidly increased
- slowly increased
___ is the change of solid-state directly to vapor state without going through the ___state.
i) Liquid ⇌ Vapour 1. Melting point
ii) Solid ⇌ Liquid 2. Freezing point
iii) Solid ⇌ Vapour 3. Boiling point
iv) Liquid ⇌ Solid 4. Sublimation point
5. Condensation point
- i:1, ii:2, iii:3, iv:4
- i:3, ii:1, iii:4, iv:2
- i:2, ii:1, iii:3, iv:4
- i:3, ii:2, iii:4, iv:5
Give reason for the following observation :
Naphthalene balls disappear with time without leaving any solid
- Temperature
- Pressure
- Catalyst
- Concentration
Complete the following reaction
A substance is said to be______________ if it passes from the solid state directly into the gaseous state without changing into a liquid.
- Pressure
- Catalyst
- Concentration
- Temperature
4. Can a substance be changed from solid to gaseous state directly without being changed into its liquid state? Give examples.
4. Can a substance be changed from solid to gaseous state directly without being changed into its liquid state? Give examples.
Give reasons for the following.
The size of naphthalene balls decreases when left open for some time.
- evaporation
- condensation
- sublimation
- True
- False
- Concentration
- Pressure
- Temperature
- Catalyst