CHAPTER NO.8 ACIDS, BASES AND SALTS

1.	Unit of Kw is a. Mol dm-3 b. Mol-2 dm-6 c. Mol2 dm-6 d. Non of these	C
2.	Conjugate acid base pair differs by a. A proton b.  A proton pair c. An electron d. An electron pair	A
3.	1M solution of Ca(OH)2 is mixed with 1M solution of HCl. The solution formed is a. Acidic b. Basic c. Neutral d. amphoteric	B
4.	Cl- is the conjugate base of a. AlCl3 b. NaCl c. HCl d. KClO3	C
5.	pH of an aqueous solutions ,its pOH is a. 11 b. 9 c. 7 5	D
6.	Salt of a weak base and strong acid has pH , approximately a. 8 b. 6 c. 7 d. 9	B
7.	Very large Ka value means that the solution is a. Strong acid b. Weak acid c. Weak base d. Strong base	A
8.	A solution with pKa = 9, is a. Strong acid b. Weak acid c. Weak base d. Strong base	B
9.	Example of buffer solution is a. HCl/NaCl b. NH4 OH/NH4 Cl c. NaOH/H2 CO3 d. Non of these	B
10.	Which one of the following is strongest acid a. HF b. HCl c. HBr d. HI	D
11.	An anoin is a/an a. Acid b. Base c. Amphoteric d. none	B
12.	which one of the following statement is false for the acids that they a. liberate H b. accept electrons c. have high pH d. turn blue litmus red	C
13.	10-3 moles of HNO3 is dissolved/L. its pH is a. -3 b. 5 c. 3 d. 1	C
14.	strong acid and weak base make the solution a. Acidic b. Basic c. Neutral d. Acidic, basic, neutral	A
15.	Salt derived from a strong base and weak acid make the solution a. Acidic b. Basic c. Neutral d. Acidic, basic, neutral	B
16.	Salt derived from a strong acid and strong base make the solution a. Acidic b. Basic c. Neutral d. Acidic, basic, neutral	C
17.	Salt derived from a weak acid and weak base make the solution a. Acidic b. Basic c. Neutral d. Acidic, basic, neutral	D
18.	If a base dissolves in water it is called an a. Acid b. Base c. Amphoteric d. Alkali	D
19.	A weak acid has is a a. Strong conjugate base b. Strong conjugate acid c. Weak conjugate base d. weak conjugate acid	A
20.	A weak base has is a a. Strong conjugate base b. Strong conjugate acid c. Weak conjugate base d. weak conjugate acid	B
21.	pKw =…. at 250 a. 0 b. 7 c. 14 d. Non of these	C
22.	C. the value pKw of decrease with a. Increase in temperature b. Decrease in temperature c. No impact with temperature d. Non of these	A
23.	Ka x Kb = a. Kw b. 1014 c. Both a and b d. 14	C
24.	pKa + pKb = a. Kw b. 1014 c. Both a and b d. 14	D
25.	Which one of the following is weak acid a. HI b. HBr c. HCl d. HCN	D