Q.1. Water drops are spherical because of ?
A.viscosity
B.density
C.polarity
Explanation:-
This is due to the surface tension of the liquid.
The cohesive force between the liquid molecules is responsible for the phenomenon called surface tension.
The cohesive forces between molecules in a liquid are shared with all neighboring molecules. Those on the surface, they have no neighboring molecules above and, thus, exhibit stronger attractive forces upon their nearest neighbors on and below the surface.
Q.2 Which one of the following metals does not react with water to produce Hydrogen?
A.Cadmium
B.Lithium
C.Potassium
D.Sodium
Answer:A
Q.3 Aspirin is
A.acetyl salicylic acid
B.sodium salicylate
C.methyl salicylate
D.ethyl salicylate
Answer:A
A.viscosity
B.density
C.polarity
D.surface tension
Explanation:-
This is due to the surface tension of the liquid.
The cohesive force between the liquid molecules is responsible for the phenomenon called surface tension.
The cohesive forces between molecules in a liquid are shared with all neighboring molecules. Those on the surface, they have no neighboring molecules above and, thus, exhibit stronger attractive forces upon their nearest neighbors on and below the surface.
Surface tension could be defined as the property of the surface of a liquid that allows it to resist an external force, due to the cohesive nature of the water molecules.
Answer:-D
Q.2 Which one of the following metals does not react with water to produce Hydrogen?
A.Cadmium
B.Lithium
C.Potassium
D.Sodium
Answer:A
Q.3 Aspirin is
A.acetyl salicylic acid
B.sodium salicylate
C.methyl salicylate
D.ethyl salicylate
Answer:A
No comments:
Post a Comment