Equilibrium Set 5

1.

Study the following table.

Buffer solution	Volume (in mL) of 1 M weak acid	Volume (in mL) of 0.1 M sodium salt of weak acid
I	4.0	4.0
II	4.0	40.0
III	40.0	4.0
IV	0.1	10.0

Which of the two sets of buffer solutions have least pH?

I and II I and III II and III II and IV NULL NULL NULL

2.

Which indicator works in the

range 8-9.8?

Phenolphthalein Methyl orange Methyl red Litmus NULL NULL NULL

3.

100 mL of 0.015 M

solution is mixed with 100 mL of 0.005 M HCl. What is the pH of the resultant solution?

2.5 1.5 2 1 NULL NULL NULL

4.

The solubility of

is

Its solubility product is:

NULL NULL NULL

5.

The volume of water needed to dissolve

of

at

is:

None of these NULL NULL NULL

6.

In a vessel containing

and

at equilibrium, some helium gas in introduced so that, the total pressure increase, while temperature and volume remain constant. According to Le-Chatelier's principle the dissociation of

Increases Decreases Remains unaltered Changes unpredictably NULL NULL NULL

7.

Given the equilibrium system
<img width=242 height=22 src="https://mytat.co/uploads/question/EQUILIBRIUM-1_filesimage450.png">
<img width=82 height=22 src="https://mytat.co/uploads/question/EQUILIBRIUM-1_filesimage451.png"> kcal/mol).
What change will shift the equilibrium to the right?

Decreasing the temperature Increasing the temperature Dissolving