1341. The Solubility of AGl in Nal solution is less than in pure water . This is because :

A. Agl forms complex with Nal
B. Common ion effect *
C. Solubility product of Nal is less than AGl.
D. Temperature of solution decrease

1342. Ph of water is 7 at 50 degree centigrade . This water sample is :

A. Neutral
B. Acidic
C. Basic *
D. None

1343. _________ solvent is leveling for acids :

A. Protophilic *
B. Protogenic
C. Protonic
D. Acidic

1344. An aqueous solution of 1M Nacl and 1M Hcl is :

A. Buffer with PH < 7
B. Buffer with Ph > 7
C. Not a buffer but Ph < 7 *
D. Not a buffer but Ph > 7

1345. The sum of PH and Poh above 25 degree centigrade is :

A. Equal to 14
B. Less than 14 *
C. Greater than 14
D. All are possible

1346. Ph of 0.1 M solution of acid HX is 3 .The value of Ka of this acid is approximately equal to :

A. 10-7
B. 10 -3
C. 10 -5 *
D. 3 * 10 -1

1347. How many liters of water should be added to one litre of aqueous solution of HCI with a ph = 1 ; to creates an aqueous solution of ph- 2:

A. 1 L
B. 0.1 L
C. 10 L
D. 9 L *

1348. Which of the following is not a butter solution :

A. H2S and KHS
B. H2CO3 and KHCO3
C. NH3 AND NH4Cl
D. KCIO4 AND HCIO4 *

1349. Solution of 0.1 NH4OH and O.1 M NH4CL has PH 9.25. The PKB for NH4OH IS :

A. 9.25 *
B. 10
C. 4.75
D. 8.25

1350. To prepare a buffer solution of ph= 6. The Sodium acetate and acetic acid must be mixed ratio of their concentrations ( Ka = 10 -5):

A. 1: 10
B. 10: 1 *
C. 100:1
D. 1:100