Water on mountains starts boiling at a temperature less than 100°C. This phenomenon occurs because the atmospheric pressure is lower at higher altitudes compared to sea level. Boiling occurs when a liquid's vapor pressure equals the surrounding atmospheric pressure. At higher elevations, the reducedRead more
Water on mountains starts boiling at a temperature less than 100°C. This phenomenon occurs because the atmospheric pressure is lower at higher altitudes compared to sea level. Boiling occurs when a liquid’s vapor pressure equals the surrounding atmospheric pressure. At higher elevations, the reduced atmospheric pressure lowers the boiling point of water. For instance, at an elevation of 2,000 meters (approximately 6,561 feet), water boils at about 93°C (199.4°F). This decreased boiling point has practical implications, such as affecting cooking times and methods in mountainous regions. Understanding this concept is essential for activities like mountaineering, high-altitude cooking, and certain industrial processes. Therefore, the correct answer is [A] Less than 100 °C. This reduction in boiling point due to lower atmospheric pressure at high altitudes is a well-established principle in physics and chemistry.
The correct answer is option [B] Melting point. The melting point is the temperature at which a solid substance transitions into its liquid state when heat is applied. At this temperature, the solid's internal structure breaks down, allowing its particles to move freely and assume the liquid state.Read more
The correct answer is option [B] Melting point. The melting point is the temperature at which a solid substance transitions into its liquid state when heat is applied. At this temperature, the solid’s internal structure breaks down, allowing its particles to move freely and assume the liquid state. Options [A] Boiling point and [C] Evaporation refer to processes involving liquid substances, not solids. Therefore, option [B] Melting point accurately describes the temperature associated with the solid-to-liquid phase transition. Option [D] None of these is incorrect, as melting point specifically denotes this transition.
The addition of impurities typically decreases the melting point of a substance. When impurities are introduced into a pure substance, they disrupt the regular arrangement of particles within the crystal lattice. As a result, the cohesive forces between the particles are weakened, requiring less eneRead more
The addition of impurities typically decreases the melting point of a substance. When impurities are introduced into a pure substance, they disrupt the regular arrangement of particles within the crystal lattice. As a result, the cohesive forces between the particles are weakened, requiring less energy to overcome them and transition into the liquid phase. Consequently, the melting point of the impure substance is lower than that of the pure substance. This phenomenon is known as freezing-point depression. Therefore, the answer is [A] decrease.
It’s a common occurrence observed in everyday life, such as adding salt to ice to lower its melting point, facilitating the melting of ice on roads during winter. Therefore, the correct answer is option [A] decrease. Options [B] increase, [C] remain unchanged, and [D] None of these do not accurately describe the effect of impurities on the melting point.
With an increase in pressure, the boiling point of a liquid generally rises. This phenomenon is described by the Clausius–Clapeyron equation, which states that an increase in pressure leads to an increase in the boiling point. Higher pressure compresses the gas phase, making it more difficult for moRead more
With an increase in pressure, the boiling point of a liquid generally rises. This phenomenon is described by the Clausius–Clapeyron equation, which states that an increase in pressure leads to an increase in the boiling point. Higher pressure compresses the gas phase, making it more difficult for molecules to escape into it from the liquid phase. Consequently, a higher temperature is needed to maintain equilibrium between the liquid and gas phases, resulting in a higher boiling point. This relationship between pressure and boiling point is particularly evident in systems like pressure cookers, where increased pressure results in higher cooking temperatures, facilitating faster cooking times. However, it’s essential to note that this relationship may not hold true for all substances, especially those exhibiting anomalous behavior under certain conditions.
The correct answer is option [A] Melting. Melting is the process in which a substance transitions from its solid state to its liquid state upon the application of heat. This occurs when the temperature of the solid reaches its melting point, causing the solid's crystal lattice structure to break dowRead more
The correct answer is option [A] Melting. Melting is the process in which a substance transitions from its solid state to its liquid state upon the application of heat. This occurs when the temperature of the solid reaches its melting point, causing the solid’s crystal lattice structure to break down, allowing its particles to move more freely and adopt the liquid phase. Option [B] Evaporation involves the transition of a liquid to vapor, while option [C] Boiling refers to the rapid vaporization of a liquid at its boiling point. Option [D] None of these is incorrect, as melting specifically denotes the solid-to-liquid phase transition.
Water on mountains starts boiling at the following temperature
Water on mountains starts boiling at a temperature less than 100°C. This phenomenon occurs because the atmospheric pressure is lower at higher altitudes compared to sea level. Boiling occurs when a liquid's vapor pressure equals the surrounding atmospheric pressure. At higher elevations, the reducedRead more
Water on mountains starts boiling at a temperature less than 100°C. This phenomenon occurs because the atmospheric pressure is lower at higher altitudes compared to sea level. Boiling occurs when a liquid’s vapor pressure equals the surrounding atmospheric pressure. At higher elevations, the reduced atmospheric pressure lowers the boiling point of water. For instance, at an elevation of 2,000 meters (approximately 6,561 feet), water boils at about 93°C (199.4°F). This decreased boiling point has practical implications, such as affecting cooking times and methods in mountainous regions. Understanding this concept is essential for activities like mountaineering, high-altitude cooking, and certain industrial processes. Therefore, the correct answer is [A] Less than 100 °C. This reduction in boiling point due to lower atmospheric pressure at high altitudes is a well-established principle in physics and chemistry.
See lessThe temperature at which a solid substance gets converted into liquid after receiving heat is called
The correct answer is option [B] Melting point. The melting point is the temperature at which a solid substance transitions into its liquid state when heat is applied. At this temperature, the solid's internal structure breaks down, allowing its particles to move freely and assume the liquid state.Read more
The correct answer is option [B] Melting point. The melting point is the temperature at which a solid substance transitions into its liquid state when heat is applied. At this temperature, the solid’s internal structure breaks down, allowing its particles to move freely and assume the liquid state. Options [A] Boiling point and [C] Evaporation refer to processes involving liquid substances, not solids. Therefore, option [B] Melting point accurately describes the temperature associated with the solid-to-liquid phase transition. Option [D] None of these is incorrect, as melting point specifically denotes this transition.
See lessWhat effect does the addition of impurities have on the melting point?
The addition of impurities typically decreases the melting point of a substance. When impurities are introduced into a pure substance, they disrupt the regular arrangement of particles within the crystal lattice. As a result, the cohesive forces between the particles are weakened, requiring less eneRead more
The addition of impurities typically decreases the melting point of a substance. When impurities are introduced into a pure substance, they disrupt the regular arrangement of particles within the crystal lattice. As a result, the cohesive forces between the particles are weakened, requiring less energy to overcome them and transition into the liquid phase. Consequently, the melting point of the impure substance is lower than that of the pure substance. This phenomenon is known as freezing-point depression. Therefore, the answer is [A] decrease.
See lessIt’s a common occurrence observed in everyday life, such as adding salt to ice to lower its melting point, facilitating the melting of ice on roads during winter. Therefore, the correct answer is option [A] decrease. Options [B] increase, [C] remain unchanged, and [D] None of these do not accurately describe the effect of impurities on the melting point.
With increase in pressure, the boiling point of a liquid will
With an increase in pressure, the boiling point of a liquid generally rises. This phenomenon is described by the Clausius–Clapeyron equation, which states that an increase in pressure leads to an increase in the boiling point. Higher pressure compresses the gas phase, making it more difficult for moRead more
With an increase in pressure, the boiling point of a liquid generally rises. This phenomenon is described by the Clausius–Clapeyron equation, which states that an increase in pressure leads to an increase in the boiling point. Higher pressure compresses the gas phase, making it more difficult for molecules to escape into it from the liquid phase. Consequently, a higher temperature is needed to maintain equilibrium between the liquid and gas phases, resulting in a higher boiling point. This relationship between pressure and boiling point is particularly evident in systems like pressure cookers, where increased pressure results in higher cooking temperatures, facilitating faster cooking times. However, it’s essential to note that this relationship may not hold true for all substances, especially those exhibiting anomalous behavior under certain conditions.
See lessThe change of state of a substance from solid to liquid is called
The correct answer is option [A] Melting. Melting is the process in which a substance transitions from its solid state to its liquid state upon the application of heat. This occurs when the temperature of the solid reaches its melting point, causing the solid's crystal lattice structure to break dowRead more
The correct answer is option [A] Melting. Melting is the process in which a substance transitions from its solid state to its liquid state upon the application of heat. This occurs when the temperature of the solid reaches its melting point, causing the solid’s crystal lattice structure to break down, allowing its particles to move more freely and adopt the liquid phase. Option [B] Evaporation involves the transition of a liquid to vapor, while option [C] Boiling refers to the rapid vaporization of a liquid at its boiling point. Option [D] None of these is incorrect, as melting specifically denotes the solid-to-liquid phase transition.
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