12th Chemistry chapter 3 Bihar board with NCERT-Details & Highlights
| name of content | 12th Chemistry chapter 3 full solution |
| content | Chemistry objective type MCQ question with answer |
| name of subjects | class 12 Chemistry |
| important for exam | Bihar board & other state board |
| pattern & Level | NCERT & State level question |
12th Chemistry chapter 3 all objective solutions – download PDF
1. A standard hydrogen electrode that a zero potential because
-
- (a) hydrogen can be most’easily oxidized
- (b) hydrogen has only one electron
- (c) the electrode potential is assumed to be zero
- (d) hydrogen is the lightest element.
Ans (C)
2. Which of the following is the correct order in which metals displace each other from the salt solution of their salts ?
-
- (a) Zn, Al, Mg, Fe, Cu
- (b) Cu, Fe, Mg, Al, Zn
- (c) Mg, Al, Zn, Fe, Cu
- (d) Al, Mg, Fe, Cu, Zn
Ans (D)
3. Fluorine is the best oxidising agent because it has ………..
-
- (a) highest electron affinity
- (b) highest reduction potential
- (c) highest oxidation potential
- (d) lowest electron affinity.
Ans (B)
4. The molar conductivity is maximum for the solution of concentration
-
- (a) 0.004 M
- (b) 0.002 M
- (c) 0.005 M
- (d) 0.001 M
Ans (D)
5. Specific conductance of 0.1 M NaCl solution is 1.01 x 10-2 ohm-1cm-1. Its molar conductance in ohm-1 cm2 mol-1
-
- (a) 1.01 x 102
- (b) 1.01 x 103
- (c) 1.01 x 104
- (d) 1.01
Ans (A)
6. When water is added to an aqueous solution of an electrolyte, what is the change in specific conductivity of the electrolyte ?
-
- (a) Conductivity decreases
- (b) Conductivity increases
- (c) Conductivity remain same
- (d) Conductivity does not depend on number of ions
Ans (A)
7. In galvanic cell, anode is :
-
- (a) Negative electrode
- (b) Positive electrode
- (c) Neutral electrode
- (d) None of these
Ans (A)
8. The cell which involves the conversion of chemical energy into electrical energy is called :
-
- (a) Electrolytic cell
- (b) Galvanic cell
- (c) Conductivity cell
- (d) All of these
Ans (B)
9. When flow of electric current in a conductor is through flow of electron then, the conductor is called:
-
- (a) Metallic conductor
- (b) Electrolytic conductor
- (c) Bad conductor
- (d) None of these
Ans (A)
10. If 96500 coulomb electricity is passed through CuSO4Solution, it will liberate.
-
- (a) 63.5 gm of Cu
- (b) 31.76 gm of Cu
- (c) 96500 gm of Cu
- (d) 100 gm of Cu
Ans (B)
Bihar Board most important mcq solution 12th chemistry chapter 3
11. Fused NaCl on electrolysis gives …… on cathode.
-
- (a) Chlorine
- (b) Sodium
- (c) Sodium amalgam
- (d) Hydrogen
Ans (B)
12. n an aqueous solution hydrogen (H) will not reduce :
-
- (a) Fe3+
- (b) Zn2+
- (c) Cu2+
- (d) Ag
Ans (A)
13. Which of the following is a secondary cell ?
-
- (a) Leclanche cell
- (b) Lead storage battery
- (c) Concentration cell
- (d) All of these
Ans (B)
14. Faraday’s second law of electrolysis is related to :
-
- (a) Atomic number of cation
- (b) Speed of cation
- (c) Speed of anion
- (d) Equivalent weight of electrolyte
Ans (D)
15. The molar conductivity is maximum for the solution of concentration :
-
- (a) 0.004 M
- (b) 0.002 M
- (c) 0.005 M
- (d) 0.001 M
Ans (D)
16. Which has the maximum standard oxidation potential ?
-
-
- (a) Zn
- (b) Cu
- (c) Ag
- (d) Mg
-
Ans (D)
17. The quantity of charge required to obtain one mole of aluminium from Al2O3is …….
-
- (a) 1 F
- (b) 6 F
- (c) 3 F
- (d) 2 F
Ans (C)
18. One Faraday electricity equal to how much Coulombs ?
-
- (a) 96550
- (b) 96500
- (c) 96000
- (d) 95500
Ans (B)
19. When one faraday of electric current is passed, the mass deposited, is equal to :
-
- (a) One gram equivalent
- (b) One gram mole
- (c) electrochemical equivalent
- (d) Half gram equivalent
Ans (C)
20. The electrode through which electrons enter into electrolytic solution is:
-
- (a) Cathode
- (b) Anode
- (c) May be anode cathode
- (d) None
Ans (C)
21. A dilute aqueous solution of sodium fluoride is electrolysed, the products at the anode and cathode are :
-
- (a) F, Na
- (b) F2, H2
- (c) O2 , Na
- (d) O2, H2
Ans (B)
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Bihar board 12th science stream subjects wise solution
click here to check out Bihar board science stream all subjects solutions
| SL.N. | Subject name with solutions |
| 01 | Physics |
| 02 | Chemistry |
| 03 | Biology |
| 04 | Math |
| 05 | Hindi |
| 06 | English |
