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কোন বিক্রিয়াটি তাপোৎপাদী?

H_{2} 0 (1) \to H_{2} 0 (g)

H_{2} 0 (g) \to H_{2} 0 (1)

H_{2} 0 (s) \to H_{2} 0 (1)

H_{2} 0 (s) \to H_{2} 0 (g)

ANS : 2

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