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Which of the following preocesses are ac...

Which of the following preocesses are accompained by increase of entropy.
a. Dissolution of iodine in a solvent
b. `HCI` is added to `AgNO_(3)` and a precipitate of `AgCI` is obtained.
c. A partition is removed to allow two gases to mix.

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Increase of entropy: (a) and (c ).
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A balck coloured compound (A) on reaction with dilute H_(2)SO_(4) gives a gas (B) which on passing in a solution of an acid (C ) gives a white turbidity (D). Gas (B ) when passed in an acidified solution of a compound (E ) gives a precipitate (F) soluble in dil HNO_(4) . After boiling this solution when an excess of NH_(4)OH is added, a blue coloured compound (G) is formed. To this solution on addition of acetic acid and aqueous K_(4)[Fe(CN)_(6)] a chocolate precipitate (H) is obtained. On addition of an aqueous solution of BaCl_(2) to an aqueous solution of (E) , a white precipitate insolution in HNO_(3) is obtained. Identify (A) to (H).

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During which of the following processes, does entropy decrease ? (A)Freezing of water to ice at 0^(@)C (B) Freezing of water to ice at -10^(@)C (C ) N_(2)(g)+3H_(2)(g) to 2NH_(3)(g) (D) Adsorption of CO(g) on lead surface. (E ) Dissolution of NaCl in water Choose the correct answer from the options given below:

A certain compound (X) shows the following reactions. (a) when Ki is added to an aqueous suspention of (X) containing acetic acid, iodine is liberated. (b) when CO_(2) is passed through an aqueous suspension of (X) the turbidity transforms to a precipitate. (c ) When the past of (X) in water is heated with ethyl alcohol, a product of anaesthetic use is obtained. Identify (X) and write down chemical equations for reactions at steps (a), and (c ).

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