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Controlling Process

When HCl diss...

Question

When HCl dissolve in water then it shows which type of deviation and why?

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Q. When sugar dissolved in water, why is it not visible?

Q. (i) Gas (A) is more soluble in water than gas (B) at the same temperature. Which one of the two gases will have the higher value of

K_{H}

(Henry's constant) and why?

(ii) In non-ideal solution, what type of deviation shows the formation of maximum boiling azeotropes?

Q. When the solid A is added to water, it dissolves with the evolution of a lot of heat and making little explosions to form two products B and C. The properties of products B and C are entirely different from those of solid A as well as water. Moreover, products B and B cannot be reconverted into solid A and water. When another solid D is added to water, it dissolves with the absorption of a little heat to form a product E which cools down. The product E shows the properties of both, solid D as well as water. Moreover, product E can be converted into solid D and water.

(a) What type of change occurs when solid A is dissolved in water ? Why ?
(b) What type of change occurs when solid D is dissolved in water ? Why ?
(c) Name a metal which you think could behave like solid A.Also name the products B and C.
(d) Name the solid D if it is the one which is used in making ordinary dry cells.
(e) Name the process by which D can be recovered from E.

Q. If we add 1*10^-8of HCl into pure water in the following reaction:
HCl (aq) + H₂O (l) to give H₃O⁺ (aq) + Cl^- (aq)
and assuming that volume doesn't change when HCl is added, why is H₃O⁺= HCl = 10^-8? Shouldn't it be H₃O⁺+ HCl = 10^-8 because HCl is dissolved with water?

Q. A colourless gas is dissolved in water and the resulting solution turns red litmus blue. Which of the following gases shows this type of reaction?

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