Skating on ice demonstrates that increasing pressure lowers the melting point of ice. When pressure is applied to ice, it causes a temporary phase transition, converting a thin layer of ice into liquid water, even at temperatures below the normal freezing point. This phenomenon reduces friction betwRead more
Skating on ice demonstrates that increasing pressure lowers the melting point of ice. When pressure is applied to ice, it causes a temporary phase transition, converting a thin layer of ice into liquid water, even at temperatures below the normal freezing point. This phenomenon reduces friction between the skate blades and the ice surface, enabling smoother skating movements. Hence, the correct answer is [C] decreases. Understanding this effect is essential in various fields, including sports science, materials engineering, and glaciology.
When two pieces of ice are pressed together, they stick together because the increased pressure lowers the melting point of ice at the point of contact. This phenomenon allows a thin layer of ice to melt, creating a temporary liquid bridge between the pieces. Upon release of pressure, this liquid reRead more
When two pieces of ice are pressed together, they stick together because the increased pressure lowers the melting point of ice at the point of contact. This phenomenon allows a thin layer of ice to melt, creating a temporary liquid bridge between the pieces. Upon release of pressure, this liquid refreezes, binding the pieces together. Therefore, the correct answer is [A] Due to increase in pressure the melting point of ice decreases. Understanding this effect is fundamental in various applications, including ice sculpting, construction, and geology.
During summer days, water kept in an earthen vessel stays cool primarily due to the phenomenon of evaporation. The porous structure of the earthen material allows water to slowly seep through its surface. Once on the outer surface, water molecules evaporate into the air, taking away latent heat fromRead more
During summer days, water kept in an earthen vessel stays cool primarily due to the phenomenon of evaporation. The porous structure of the earthen material allows water to slowly seep through its surface. Once on the outer surface, water molecules evaporate into the air, taking away latent heat from the remaining water inside the vessel. This process continues, leading to a continuous removal of heat from the water, thereby keeping it cool. Unlike other options such as diffusion, transpiration, or osmosis, which involve the movement of substances through membranes or diffusion gradients, evaporation specifically refers to the conversion of liquid water into vapor, usually at the surface of a liquid. Understanding this cooling effect of evaporation is crucial in various contexts, such as traditional cooling methods, climate control strategies, and the design of evaporative cooling systems for buildings or refrigeration units. Therefore, the correct answer is [D] Evaporation.
The process of making camphor vapor from solid camphor is called sublimation. Sublimation is a phase transition where a substance transitions directly from its solid phase to its gas phase without passing through the intermediate liquid phase. When solid camphor is heated, it undergoes sublimation,Read more
The process of making camphor vapor from solid camphor is called sublimation. Sublimation is a phase transition where a substance transitions directly from its solid phase to its gas phase without passing through the intermediate liquid phase. When solid camphor is heated, it undergoes sublimation, releasing vapors that have its characteristic odor. This process is commonly used in various applications, including religious rituals, medicinal purposes, and as a moth repellent. Camphor’s ability to sublime at room temperature also makes it useful in providing aromatic effects in products such as air fresheners and deodorants. Understanding the principle of sublimation is essential not only for utilizing camphor but also for comprehending various other natural and synthetic processes, such as the purification of substances, the functioning of certain air conditioning systems, and the behavior of volatile compounds in the atmosphere. Therefore, the correct answer to the process of making camphor vapor from solid camphor is [D] Sublimation.
Dew is not formed on a strong windy night primarily because the rate of evaporation is fast. Wind increases the movement of air, which in turn enhances the rate of evaporation by carrying away the thin layer of moisture near the ground. As a result, any moisture that condenses on surfaces at night dRead more
Dew is not formed on a strong windy night primarily because the rate of evaporation is fast. Wind increases the movement of air, which in turn enhances the rate of evaporation by carrying away the thin layer of moisture near the ground. As a result, any moisture that condenses on surfaces at night due to cooling temperatures is quickly evaporated by the wind, preventing the formation of dew. This phenomenon is particularly noticeable on windy nights when the air movement is strong enough to disrupt the delicate balance between condensation and evaporation needed for dew formation. Additionally, wind can also mix and disperse the air, reducing the relative humidity near the ground, which further inhibits dew formation. Therefore, the correct answer is [A] the rate of evaporation is fast. Understanding this effect of wind on dew formation is essential in meteorology and agriculture, particularly for predicting overnight condensation and its impact on crops and outdoor activities.
Skating on ice shows that on increasing the pressure the melting point of ice
Skating on ice demonstrates that increasing pressure lowers the melting point of ice. When pressure is applied to ice, it causes a temporary phase transition, converting a thin layer of ice into liquid water, even at temperatures below the normal freezing point. This phenomenon reduces friction betwRead more
Skating on ice demonstrates that increasing pressure lowers the melting point of ice. When pressure is applied to ice, it causes a temporary phase transition, converting a thin layer of ice into liquid water, even at temperatures below the normal freezing point. This phenomenon reduces friction between the skate blades and the ice surface, enabling smoother skating movements. Hence, the correct answer is [C] decreases. Understanding this effect is essential in various fields, including sports science, materials engineering, and glaciology.
See lessWhen two pieces of ice are pressed together, the pieces stick together, because —
When two pieces of ice are pressed together, they stick together because the increased pressure lowers the melting point of ice at the point of contact. This phenomenon allows a thin layer of ice to melt, creating a temporary liquid bridge between the pieces. Upon release of pressure, this liquid reRead more
When two pieces of ice are pressed together, they stick together because the increased pressure lowers the melting point of ice at the point of contact. This phenomenon allows a thin layer of ice to melt, creating a temporary liquid bridge between the pieces. Upon release of pressure, this liquid refreezes, binding the pieces together. Therefore, the correct answer is [A] Due to increase in pressure the melting point of ice decreases. Understanding this effect is fundamental in various applications, including ice sculpting, construction, and geology.
See lessDuring summer days, water kept in an earthen vessel cool. This happens due to the following phenomenon
During summer days, water kept in an earthen vessel stays cool primarily due to the phenomenon of evaporation. The porous structure of the earthen material allows water to slowly seep through its surface. Once on the outer surface, water molecules evaporate into the air, taking away latent heat fromRead more
During summer days, water kept in an earthen vessel stays cool primarily due to the phenomenon of evaporation. The porous structure of the earthen material allows water to slowly seep through its surface. Once on the outer surface, water molecules evaporate into the air, taking away latent heat from the remaining water inside the vessel. This process continues, leading to a continuous removal of heat from the water, thereby keeping it cool. Unlike other options such as diffusion, transpiration, or osmosis, which involve the movement of substances through membranes or diffusion gradients, evaporation specifically refers to the conversion of liquid water into vapor, usually at the surface of a liquid. Understanding this cooling effect of evaporation is crucial in various contexts, such as traditional cooling methods, climate control strategies, and the design of evaporative cooling systems for buildings or refrigeration units. Therefore, the correct answer is [D] Evaporation.
See lessThe process of making camphor vapor from solid camphor is called
The process of making camphor vapor from solid camphor is called sublimation. Sublimation is a phase transition where a substance transitions directly from its solid phase to its gas phase without passing through the intermediate liquid phase. When solid camphor is heated, it undergoes sublimation,Read more
The process of making camphor vapor from solid camphor is called sublimation. Sublimation is a phase transition where a substance transitions directly from its solid phase to its gas phase without passing through the intermediate liquid phase. When solid camphor is heated, it undergoes sublimation, releasing vapors that have its characteristic odor. This process is commonly used in various applications, including religious rituals, medicinal purposes, and as a moth repellent. Camphor’s ability to sublime at room temperature also makes it useful in providing aromatic effects in products such as air fresheners and deodorants. Understanding the principle of sublimation is essential not only for utilizing camphor but also for comprehending various other natural and synthetic processes, such as the purification of substances, the functioning of certain air conditioning systems, and the behavior of volatile compounds in the atmosphere. Therefore, the correct answer to the process of making camphor vapor from solid camphor is [D] Sublimation.
See lessDew is not formed on a strong windy night because
Dew is not formed on a strong windy night primarily because the rate of evaporation is fast. Wind increases the movement of air, which in turn enhances the rate of evaporation by carrying away the thin layer of moisture near the ground. As a result, any moisture that condenses on surfaces at night dRead more
Dew is not formed on a strong windy night primarily because the rate of evaporation is fast. Wind increases the movement of air, which in turn enhances the rate of evaporation by carrying away the thin layer of moisture near the ground. As a result, any moisture that condenses on surfaces at night due to cooling temperatures is quickly evaporated by the wind, preventing the formation of dew. This phenomenon is particularly noticeable on windy nights when the air movement is strong enough to disrupt the delicate balance between condensation and evaporation needed for dew formation. Additionally, wind can also mix and disperse the air, reducing the relative humidity near the ground, which further inhibits dew formation. Therefore, the correct answer is [A] the rate of evaporation is fast. Understanding this effect of wind on dew formation is essential in meteorology and agriculture, particularly for predicting overnight condensation and its impact on crops and outdoor activities.
See less