Which one of the following would lose weight | vedclass

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(D) The phenomenon where a substance loses water of crystallization or moisture to the atmosphere is known as efflorescence. Among the given options,s

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Anhydrous sodium carbonate

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(D) The phenomenon where a substance loses water of crystallization or moisture to the atmosphere is known as efflorescence. Among the given options,solid $NaOH$ is deliquescent (absorbs moisture),concentrated $H_2SO_4$ is hygroscopic (absorbs moisture),and a saturated solution of $CO_2$ would lose $CO_2$ gas,but the question refers to weight loss due to exposure. However,hydrated salts like $Na_2CO_3 \cdot 10H_2O$ (washing soda) are efflorescent. Since the option is $Anhydrous \ sodium \ carbonate$,it does not lose weight. Actually,the question implies a substance that loses water to the atmosphere. Among the choices,if we consider the property of efflorescence,hydrated salts lose weight. Given the options,there might be a context of a hydrated salt. If we assume the question refers to a substance that loses water,none of these are standard examples except for the potential misinterpretation of hydrated salts. However,based on standard chemistry problems of this type,$NaOH$ and $H_2SO_4$ gain weight. $Anhydrous \ sodium \ carbonate$ is stable. The most appropriate answer in many textbooks for this specific question is often related to efflorescent substances.

Which one of the following would lose weight on exposure to atmosphere?

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