Advertisements
Advertisements
Question
A substance which can change its state
Options
wood
oxygen
paper
cloth
Solution
oxygen
APPEARS IN
RELATED QUESTIONS
Convert the following temperature to the Kelvin scale.
373°C
Give an example of desirable change which can also be undesirable.
Name the temperature at which :
- a liquid changes into a gas.
- a solid changes into a liquid.
How is ammonia gas liquefied ?
Which of the following process/processes release heat ?
- condensation
- vaporisation
- freezing
- melting
When water is heated to a temperature x, it gets converted into steam at temperature x by a process called R. And when steam at temperature x is cooled, it gets reconverted into water at the same temperature x by a process called S.
- How much is the value of x in Kelvin ?
- What is the process R called ?
- What is the name of the energy absorbed during the process R ?
- What is process S known as ?
- What is the name of energy released during the process S known as ?\\
Name the phenomenon which causes the following changes:
Disappearance of camphor when exposed to air
Photosynthesis is a natural process by which green plants manufacture food in the presence of sunlight.
Can the change be reversed or is it irreversible?
Give the reason for the following
On heating a sublimable solid, the molecules break free & escape from the surface of the solid directly into vapour.
Complete the blank with reference to interconversion of matter on the basis of kinetic theory-with the word ‘increase’, ‘decreases’, ‘gain’, ‘lose’, or ‘overcome’ in following case.
During the melting of solids, the inter-particles space __________.