A. 5
B. 7
C. > 7
D. < 7
Related Mcqs:
- An aqueous solution of 2.45% by weight H2SO4 has a specific gravity of 1.011. The composition expressed in normality is______________?
A. 0.2500
B. 0.2528
C. 0.5000
D. 0.5055 - For a reaction, X → Y, if the concentration of ‘X’ is tripled; the rate becomes nine times. The order of reaction is__________________?
A. 0
B. 1
C. 2
D. 3 - The OH- concentration in a solution having pH value 3 is____________________?
A. 10-3
B. 10-10
C. 10-11
D. 10-13 - Acidity or alkanity of a solution is expressed by its pH value, which is defined as (where, [H+] = hydrogen ion concentration in the solution) ?
A. log (1/H+)
B. – log (1/H+)
C. 1/log H+
D. None of these - If pH value of an acidic solution is decreased from 5 to 2, then the increase in its hydrogen ion concentration is _____________ times?
A. 10
B. 100
C. 1000
D. 10000 - The pH value of a solution is 5.9. If the hydrogen ion concentration is decreased hundred times, the solution will be______________?
A. Basic
B. More acidic
C. Neutral
D. Of the same acidity - pH value of a solution containing equal concentration of hydroxyl and hydrogen ions will be_________________?
A. 0
B. 10
C. 7
D. 14 - Pure aniline is evaporating through a stagnant air film of 1 mm thickness at 300 K and a total pressure of 100 KPa. The vapor pressure of aniline at 300 K is 0.1 KPa. The total molar concentration under these conditions is 40.1 mole/m3. The diffusivity of aniline in air is 0.74 × 10-5m2/s. The numerical value of mass transfer co-efficient is 7.4 × 10-3. Its units are_______________________?
A. m/s
B. cm/s
C. mole/m2.s.Pa
D. k.mole/m2.s.Pa - The hydroxyl ion (OH-) concentration in a solution having pH value 3 will be_________________?
A. 10-11
B. 10-10
C. 10-3
D. 10-4 - Two substances are in equilibrium in a reversible chemical reaction. If the concentration of each substance is doubled, then the value of the equilibrium constant will be___________________?
A. Same
B. Doubled
C. Halved
D. One fourth of its original value
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