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When solid barium hydroxide and solid ammonium chloride are mixed in the test tube in a ratio of 2 : 1 by weight at room temperature then _______.(A) reaction proceeds with rise in temperature(B) reaction proceeds with fall in temperature(C) no reaction takes place(D) no reaction takes place unless heating is done |
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Answer» (B) reaction proceeds with fall in temperature Mixing of solid barium hydroxide [Ba(OH)2] and solid ammonium chloride [NH4Cl] in a ratio of 2 : 1 by weight at room temperature in a test tube sets an endothermic reaction and it proceeds by absorbing energy from the surrounding. Thus, there is a fall in temperature and especially the bottom of the test tube becomes cold. |
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