Advertisements
Advertisements
प्रश्न
What do you observe when :
ime is dissolved in water.
उत्तर
The following two observations will be observed
(i) A hissing sound is observed.
(ii) The mixture starts boiling and lime water is obtained.
APPEARS IN
संबंधित प्रश्न
Convert the following temperature to the Kelvin scale.
25°C
What do you mean by the change of state? Write the flow chart showing the complete cycle of change of state.
Tick the most appropriate answer.
Melting of ice is a
A few substances are arranged in the increasing order of 'forces of attraction' between their particles. Which one of the following represents the correct arrangement?
What is the (a) common unit of temperature, and (b) SI unit of temperature ?
Name the temperature at which :
- a liquid changes into a gas.
- a solid changes into a liquid.
What is the name of the process in which a gas turns directly into a solid ?
Under what conditions heat can be given to a substance without raising its temperature ?
Explain why, steam at 100° C is better for heating purposes than boiling water at 100° C.
How is ammonia gas liquefied ?
The boiling point of ethane is – 88°C. This temperature will be equivalent to :
Differentiate between: Gas and vapour
Give reasons:
Why a solid does not flow, but a liquid flows?
Fill in the blanks:
Water boils at ______.
Name the phenomenon which causes the following changes:
Conversion of ice into water
The state of matter which has no definite shape or volume is called
A kind of matter which can sublime is
Explain the term condensation
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?
With reference to the liquid state of matter – answer the following
On heating, the liquid, do the particles gain or lose energy.
