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Stoichiometry

Stoichiometry
If the pH value of a solution changes by one unit, it implies that hydrogen ion concentration in the solution will change __________ times.

10
70
100
20

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Stoichiometry
A gas at 0°C is cooled at constant pressure until its volume becomes half the original volume. The temperature of the gas at this state will be

0°K
-273°C
- 136.5°K
-136.5°C

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Stoichiometry
The vapor pressure of water at 100°C is

76 cms of Hg
760 mm wc
13.6 cms of Hg
100N/m²

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Stoichiometry
Kopp's rule is useful for the determination of

Activation energy
Molal heat capacities of gases
Heat capacities of solids
Heat capacities of gases

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Stoichiometry
On addition of 1 c.c. of dilute hydrochloric acid (1% concentration) to 80 c.c. of a buffer solution of pH = 4, the pH of the solution becomes

4
1
2
8

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Stoichiometry
Hess's law of constant heat summation is based on conservation of mass. It deals with

Changes in heat of reaction
None of these
Equilibrium constant
Reaction rate

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