experts u said that in thermos flask ice will melt only after some time because of flow of heat. but in thermos flasks no heat will pass via. so why did u said thatin thermos flask ice will melt only after some time because of flow of heat

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Solution

Because due to the presence of H₂O molecules which will be in motion and so that they possessed some amount of energy which is sufficient to melt the ice.

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experts u said that in thermos flask ice will melt only after some time because of flow of heat. but in thermos flasks no heat will pass via. so why did u said thatin thermos flask ice will melt only after some time because of flow of heat

Because due to the presence of H2O molecules which will be in motion and so that they possessed some amount of energy which is sufficient to melt the ice.

Because due to the presence of H₂O molecules which will be in motion and so that they possessed some amount of energy which is sufficient to melt the ice.