Brownian motion of smoke particles in air strongly supports which model of matter?
Particulate kinetic model
The random, zig-zag movement of smoke particles suspended in air arises from continuous, random collisions with fast-moving, invisible air molecules. This observation gives strong evidence for the particulate kinetic model, confirming matter is made of discrete, constantly moving particles.
Important Questions from States of Matter
A liquid is heated up to a certain temperature. Which one of the following situation would correspond to the boiling of the liquid?
Which one among the following oxides has the highest melting point?
Equal volume of all gases, when measured at the same temperature and pressure, contain an equal number of particles. Who proposed the above law?
Match List I with List II and select the correct answer using the code given below the Lists:
Code:List I (Noble gas)
List II (Use)
A. Argon
1. In lights for advertising display
B. Neon
2. Airport landing lights and in light houses
C. Krypton
3. Light in photographer’s flash gun
D. Xenon
4. In tungsten filament to last
Match List-I with List-II and select the correct answer using the code given below the Lists:
List I
(Process)
List II
(Type of change)
A. Heating of camphor
1. Chemical
B. Cooling of water vapor up to room temperature
2. Evaporation
C. Cooking an egg
3. Condensation
D. Formation of water vapor at room temperature.
4. Sublimation
