Important Questions of Equilibrium Chemistry | Zigya

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721.

pH of a saturated solution of Ca(OH)2 is 9. The solubility product(Ksp) of Ca(OH)2 is:

  • 0.25 × 10-10

  • 0.5 × 10-15

  • 0.125 × 10-15

  • 0.5 × 10-10


722.

At 900C , pure water has [H+]=10-6 M , if 100 mL of 0.2 M HCl is added to 200mL of 0.1 M KOH at 90°C then pH of the resulting solution will be:

  • 5

  • 6

  • 7

  • 4


723.

KMnO4 can be prepared from K2MnOas per reaction

  3MnO42- + 2H2O  2MnO4- + MnO2 + 4OH-

The reaction can go to completion by removing OH- ions by adding

  • HCl

  • KOH

  • CO2

  • SO2


724.

Consider the following reaction equilibrium:

N2(g) +3H2(g) 2NH3(g)

Initially, 1 mole of N2 and 3 moles of H2 are taken in a 2 L flask. At equilibrium state if, the number of moles of N2 is 0.6, what is the total number of moles of all gases present in the flask?

  • 0.8

  • 1.6

  • 3.2

  • 6.4


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