ORAL QUESTIONS
Q1. Name one solid, one liquid and one gas that are soluble in water.
Q2. The density of an object is slightly less than that of water. Will it float or sink in water?
Q3. Is clear water opaque, translucent or transparent?
Q4. Why do solids, liquids and gases have different properties related to shape and volume?
Answers
Answer:
(1) Kerosine is the liquid which is insoluble in water. H2 gas is also insoluble in water.
(2) The density of an object determines whether it will float or sink in another substance. An object will float if it is less dense than the liquid it is placed in. An object will sink if it is more dense than the liquid it is placed in.
(3) Materials like air, water, and clear glass are called transparent. When light encounters transparent materials, almost all of it passes directly through them.
(4) Solids, liquids and gases are different mainly because of their lattice arrangements and the cohesive forces between the molecules. ... The cohesive forces between their molecules are also very weak. This gives gases their property to flow and compressibility.