CHAPTER NO.12 ELECTROCHEMISTRY

CHAPTER NO.12 ELECTROCHEMISTRY

1.	weak electrolyte in solution is a. completely ionizeda b. slightly ionized c. never ionized d. destroyed	B
2.	strong electrolyte in solution is a. completely ionized b. slightly ionized c. never ionized d. destroyed	A
3.	which one of the following is strong electrolyte in solution is a. ammonium hydroxide b. carbonic acid c. potassium iodide d. acetic acid	A
4.	the cathode has a charge a. positive b. negative c. neutral d. zero	B
5.	the cations has a charge a. positive b. negative c. neutral d. zero	A
6.	the oxidation number of Cl in HClO3 is a. 5 b. 6 c. 2 d. 3	A
7.	the oxidation number of Cr in K2Cr2O7 is a. 5 b. 6 c. 2 d. 3	B
8.	the oxidation number of S in S2O3-2 is a. 5 b. 6 c. 2 d. 3	C
9.	The oxidation number of manganese in MnO4-1  is a. 2 b. 3 c. 4 d. 7	D
10.	Which one of the following is reduction reaction a. Br2 → 2Br- b. Fe+2 →Fe+3 c. Zn →Zn+2 d. Sn →Sn+4	A
11.	A cell in which a non spontaneous redox reaction is carried out by passing an electric current is not a/an a. Galvanic cell b. Voltaic cell c. Daniell cell d. Electrolytic cell	D
12.	zinc act is cathode when coupled with aluminum, this is because reduction potential of a. Zn > Al b. Zn < Zl c. Zn = Al d. Zn =0	A
13.	Given standard reduction potential for Fe+2 + 2 es → Fe   -0.440 V Fe+3  + 3 es →Fe    -0.036V The standard electrode potential for Fe+3 +e →Fe+2 is a. -0.476 b. 0.496 c. 0.404 d. -.404	D
14.	Electrolysis is a process in which the cations and anions liberated from the electrolyte are a. Hydrated b. Hydrolyzed c. Charged d. dicharged	B
15.	a cell which produces electric current by a redox reaction is called a/an a. electrolytic cell b. voltaic cell c. half cell standard cell	A
16.	the lead storage battery is a/an a. electrolytic cell b. voltaic cell c. standard cell d. half cell	A
17.	a cell which produces electric current by a redox reaction is called a/an a. electrolytic cell b. voltaic cell c. dry cell d. electrolytic cell	B
18.	the electrode potential of standard hydrogen electrode is a. 0 b. 1 c. -1 d. 2	A
19.	A cathode has the reduction potential a. Less than the anode b. More than the anode c. The same as that of anode d. Always zero	B
20.	The oxidation number of free element is a. 1 b. 2 c. 3 d. 0	D
21.	Which one of the following are strong oxidizing agent/s a. K2Cr2O7 b. KMnO4 c. K2Cr2O7 and KMnO4 d. H2S and SO2	C
22.	Which one of the following is strong reducing agents a. K2Cr2O7 b. KMnO4 c. K2Cr2O7 and KMnO4 d. H2S and SOz	D
23.	Choose the second law of Michael faraday a. W =Q b. W = ZIt c. W =Ite/F d. All  of these	B
24.	The value of F in W=Ite/F a. 965 C b. 9650 C c. 96500 C d. 965000 C	C
25.	Dry cell is a. Electrolytic cell b. Nelson cell c. Voltaic cell d. All of these	C