States of Matter

Lime water is a saturated solution of calcium hydroxide Ca(OH)₂ produced by mixing hydrated lime with water.It turns milky by CO₂  gas 

CFCs are not used for filling balloons.The most common gas used to fill a balloon is helium, which will make it float.

Milk is an emulsion of fat globules in water. Cream has a lower density than skimmed milk, so when cream is removed, the remaining milk has a higher proportion of denser components, increasing its overall density.

Milk is a colloid because it consists of microscopic fat globules dispersed in a water-based liquid, and these particles do not settle out over time.

The human body is composed of approximately 60% water, which is equivalent to 3/5 of the total body mass. This water is essential for various physiological processes and cellular functions.

Physical property: chopping and melting and boiling point is associated with a phase change. It describes an inherent characteristic of alcohol and ice. Chemical change involves a chemical reaction. At least one new substance is formed.

Changes in the state of matter, such as water turning from ice to liquid or steam, are primarily driven by changes in temperature.

Water vapour is the gaseous state of water. Ice is the solid state, while matter and substance are general terms for physical materials.

This option is correct because emulsion is colloidal dispersion in which both dispersed phase and dispersion medium are liquid.

Petroleum is commonly referred to as Black Gold due to its immense economic value and dark, viscous appearance. It serves as the primary source for many fuels and chemicals.

Mercury is a metal that remains liquid at room temperature and has a very high density compared to other common liquids. Its density is approximately 13.5 g/cm^3.

Kerosene is a hydrocarbon liquid that is less dense than water, which is why it floats on the surface. Petroleum and petrol also have lower densities than water, but kerosene is the standard answer in this context.

All around us are substances that are made of matter. Matter has mass and occupies some space. Different kinds of substances are made up of different matter. Matter can be thus be classified in many ways. Two basic classifications of matter are based on its physical and chemical properties. The physical classification of matter shows its physical appearance that describe the shape, hardness, softness, melting and boiling points. The chemical classification of matter shows the ability of the matter to change its composition to form new substances.

When a solid is in the form of a Lamina, its length and breadth increases on heating. Hence, its area also increases. This is known as the superficial expansion.

Ice has a relative density of 0.92. When ninety-two volumes of water at 4^oC is frozen, it will expand to hundred volumes. Thus, ice is lighter than water and hence it floats on water.