The outermost part of the flame is the hottest one, so Rakesh’s water will get heated in a shorter time. https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-6/
The outermost part of the flame is the hottest one, so Rakesh’s water will get heated in a shorter time.
No, as rusting is a very slow process as compared to combustion and the heat evolve in combustion is much more than rusting. Rusting can take place at room temperature but combustion need an ignition temperature. https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-6/
No, as rusting is a very slow process as compared to combustion and the heat evolve in combustion is much more than rusting. Rusting can take place at room temperature but combustion need an ignition temperature.
Goldsmith uses the outermost zone of the flame for melting gold and silver because it is the hottest zone (complete combustion) of the flame. https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-6/
Goldsmith uses the outermost zone of the flame for melting gold and silver because it is the hottest zone (complete combustion) of the flame.
The ignition temperature of green leaves is higher than that of the dry leaves, so dry leaves catch fire easily. https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-6/
The ignition temperature of green leaves is higher than that of the dry leaves, so dry leaves catch fire easily.
CO2, being heavier than oxygen, covers the fire like a blanket. Since the contact between the fuel and oxygen is cut off, the fire is controlled. https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-6/
CO2, being heavier than oxygen, covers the fire like a blanket. Since the contact between the fuel and oxygen is cut off, the fire is controlled.
Abida and Ramesh were doing an experiment in which water was to be heated in a beaker. Abida kept the beaker near the wick in the yellow part of the candle flame. Ramesh kept the beaker in the outermost part of the flame. Whose water will get heated in a shorter time?
The outermost part of the flame is the hottest one, so Rakesh’s water will get heated in a shorter time. https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-6/
The outermost part of the flame is the hottest one, so Rakesh’s water will get heated in a shorter time.
https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-6/
See lessCan the process of rusting be called combustion? Discuss.
No, as rusting is a very slow process as compared to combustion and the heat evolve in combustion is much more than rusting. Rusting can take place at room temperature but combustion need an ignition temperature. https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-6/
No, as rusting is a very slow process as compared to combustion and the heat evolve in combustion is much more than rusting. Rusting can take place at room temperature but combustion need an ignition temperature.
https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-6/
See lessWhich zone of a flame does a goldsmith use for melting gold and silver and why?
Goldsmith uses the outermost zone of the flame for melting gold and silver because it is the hottest zone (complete combustion) of the flame. https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-6/
Goldsmith uses the outermost zone of the flame for melting gold and silver because it is the hottest zone (complete combustion) of the flame.
https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-6/
See lessIt is difficult to burn a heap of green leaves but dry leaves catch fire easily. Explain.
The ignition temperature of green leaves is higher than that of the dry leaves, so dry leaves catch fire easily. https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-6/
The ignition temperature of green leaves is higher than that of the dry leaves, so dry leaves catch fire easily.
https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-6/
See lessExplain how CO₂ is able to control fires.
CO2, being heavier than oxygen, covers the fire like a blanket. Since the contact between the fuel and oxygen is cut off, the fire is controlled. https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-6/
CO2, being heavier than oxygen, covers the fire like a blanket. Since the contact between the fuel and oxygen is cut off, the fire is controlled.
https://www.tiwariacademy.com/ncert-solutions/class-8/science/chapter-6/
See less