States of Matter

Condensation is the process where water vapour (gas) cools down and changes state into liquid water - this is what you see as water droplets on cold surfaces or clouds forming. Evaporation is the reverse (liquid to gas), crystallization is formation of solid crystals from solution, and sublimation is solid directly becoming gas without passing through liquid state.

Curdling is the breaking of an emulsion or colloid into large parts of different composition through the physico-chemical processes of flocculation, creaming and coalescence.

This is the correct option. Glucose solution and alcohol solution are non-electrolytes. They are non-conducting liquids.

When a cold glass sits in warm air, water vapor in the air contacts the cold surface and condenses into liquid droplets on the outside. This is condensation - the same process that causes dew on grass. The water doesn't freeze, change color, or evaporate; droplets form on the exterior due to temperature difference.

Rayon is smooth, cool, and highly absorbent, making it comfortable to wear. However, unlike natural fibres such as wool or cotton, rayon does not insulate body heat well - it can feel cold to the touch. This lack of thermal insulation is the property that rayon does not possess compared to many other fibres.

When water is heated in a paper cup over a flame, the water absorbs the heat through conduction and convection. The water's boiling point (100°C) is well below the paper's ignition temperature (233°C or higher). As long as water remains in the cup, the paper cannot reach its ignition temperature, preventing it from burning.

Correct Answer: Only I

Evaporation is the process by which water is converted from its liquid form to its vapour form and thus transferred from land and water masses to the atmosphere. In nature, the sun heats the water in ponds, lakes, rivers or sea, and changes into vapour and rises in air. Here water is also disappeared because of evaporation.

Water is not only colourless and odourless, it is tasteless too. 

Condensation is the change of the physical state of matter from gaseous phase into liquid phase. The temperature of the ice cold water is close to zero. The air around the container consists of water vapour, which accounts to humidity. When the water vapour comes in contact with the outer surface of glass containing ice cold water, there is a change in physical state of water vapour to water in liquid phase due to lower temperature and condensation. Hence,  it accounts for the water droplets on the outer surface of a tumbler or a glass containing ice cold water.

At - 8 degree Celsius temperature, the water in Dal lake goes below the freezing point as the freezing point is 0 degree Celsius. So, the water in Dal lake will freeze and the lake will become so hard so that any body can walk and play on that.

Matter in the gaseous state has both variable volume and shape adapting both to fit its container. Its particles are neither close together nor fixed in place. For example, oxygen, carbon dioxide, steam, etc.

For a substance to behave as an electrolyte it should produce ions when dissolved in water.