MCQOPTIONS
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MCQOPTIONS
This section includes 41 Mcqs, each offering curated multiple-choice questions to sharpen your SRMJEEE knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
When same quantity of electricity is passed for half an hour, the amount of Cu and Cr deposited are respectively 0.375 g and 0.30 g. Ratio of electrochemical equivalent of Cu and Cr is |
| A. | 0.8 |
| B. | 1.25 |
| C. | 2.5 |
| D. | 1.62 |
| Answer» C. 2.5 | |
| 2. |
When a lead storage battery is discharged |
| A. | lead is formed |
| B. | SO2 is evolved |
| C. | lead sulphate is consumed |
| D. | sulphuric acid is consumed |
| Answer» E. | |
| 3. |
When 3.86 amperes current is passed through an electrolyte for 50 minutes, 2.4 grams of a divalent metal is deposited. The gram atomic weight of the metal (in grams) is |
| A. | 24 |
| B. | 12 |
| C. | 64 |
| D. | 40 |
| Answer» E. | |
| 4. |
What is the time (in sec) required for deposition all the silver present in 125mL of 1 M AgNO3 solution by passing a current of 241.25 amperes? (1F = 96500 coulombs) |
| A. | 10 |
| B. | 50 |
| C. | 1000 |
| D. | 100 |
| Answer» C. 1000 | |
| 5. |
What is the quantity of electricity (in coulombs) required to deposit all the silver from 250ml of 1 M AgNO3 solution? (Ag = 108) |
| A. | 2412.5 |
| B. | 24125 |
| C. | 4825.0 |
| D. | 48250 |
| Answer» C. 4825.0 | |
| 6. |
What is the electrochemical equivalent (in g coulomb–1) of silver? (Ag = 108; F = Faraday) |
| A. | 108F |
| B. | 108/F |
| C. | F/108 |
| D. | 1/108F |
| Answer» C. F/108 | |
| 7. |
What flows in the internal circuit of a galvanic cell? |
| A. | Electricity |
| B. | Electrons |
| C. | Ions |
| D. | Atoms |
| Answer» D. Atoms | |
| 8. |
The highest electrical conductivity of the following aqueous solutions is of [AIEEE 2005] |
| A. | 0.1 M acetic acid |
| B. | 0.1 M chloroacetic acid |
| C. | 0.1 M fluoroacetic acid |
| D. | 0.1 M difluoroacetic acid |
| Answer» E. | |
| 9. |
Which of the following electrolytic solutions has the least specific conductance?[Karnataka CET 2008] |
| A. | 0.02 N |
| B. | 0.2 N |
| C. | 2 N |
| D. | 0.002 N |
| Answer» E. | |
| 10. |
For the reduction of silver ions with copper metal the standard cell potential was found to be +0.46V at 25°C. The value of standard Gibbs energy, ΔG° wll be (F = 96500 C mol-1) [CBSE AIPMT 2010] |
| A. | –44.5 kJ |
| B. | –98.0 kJ |
| C. | –89.0 kJ |
| D. | –89.0 J |
| Answer» D. –89.0 J | |
| 11. |
An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to [CBSE AIPMT 2010] |
| A. | increase in both i.e. number of ions and ionic mobility of ions |
| B. | increase in number of ions |
| C. | increase in ionic mobility of ions |
| D. | 100% ionization of electrolyte at normal dilution |
| Answer» D. 100% ionization of electrolyte at normal dilution | |
| 12. |
The potential of a hydrogen electrode at pH = 10 is [West Bengal JEE 2010] |
| A. | 0.59 V |
| B. | 0.00 V |
| C. | –0.59 V |
| D. | –0.059 V |
| Answer» D. –0.059 V | |
| 13. |
A concentrated aqueous solution of sodium chloride is called |
| A. | aqueous solution |
| B. | salt solution |
| C. | brine |
| D. | lemonade |
| Answer» D. lemonade | |
| 14. |
Electrolytes convert electricity in |
| A. | solid state |
| B. | liquid state |
| C. | gaseous state |
| D. | plasma state |
| Answer» C. gaseous state | |
| 15. |
Electrodes used in production of sodium metal are |
| A. | iron cathode and graphite anode |
| B. | sodium cathode and carbon anode |
| C. | aluminum cathode and fluoride anode |
| D. | none of above |
| Answer» B. sodium cathode and carbon anode | |
| 16. |
In chromium plating few drops of Sulphuric acid are added to electrolyte in order to prevent |
| A. | oxidation |
| B. | reduction |
| C. | hydrolysis |
| D. | sublimation |
| Answer» D. sublimation | |
| 17. |
By losing one or two electrons atoms of metal are |
| A. | oxidized |
| B. | reduced |
| C. | hydrogenated |
| D. | sublimated |
| Answer» B. reduced | |
| 18. |
A reactant containing element that is oxidized is called |
| A. | reducing agent |
| B. | oxidizing agent |
| C. | hydrogen |
| D. | sublime |
| Answer» B. oxidizing agent | |
| 19. |
Electrolysis of brine produces |
| A. | chlorine gas |
| B. | hydrogen gas |
| C. | sodium hydroxide |
| D. | all of above |
| Answer» E. | |
| 20. |
When zinc is plated on steel, anode is made up of |
| A. | steel |
| B. | oxygen |
| C. | zinc |
| D. | carbon |
| Answer» D. carbon | |
| 21. |
Galvanic cells are also named as |
| A. | electrolytic cells |
| B. | battery cells |
| C. | Daniel cells |
| D. | john cells |
| Answer» D. john cells | |
| 22. |
Oxidation state of any free element is always |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 0 |
| Answer» E. | |
| 23. |
Voltaic cells generates electricity by |
| A. | spontaneous redox reaction |
| B. | non spontaneous redox reaction |
| C. | sublimation reaction |
| D. | thermochemical reaction |
| Answer» B. non spontaneous redox reaction | |
| 24. |
A physical or chemical process that occurs by itself is called |
| A. | non spontaneous |
| B. | self occurring process |
| C. | spontaneous process |
| D. | thermodynamic process |
| Answer» D. thermodynamic process | |
| 25. |
Process used to deposit one metal over another metal is called |
| A. | electrolysis |
| B. | electroplating |
| C. | carbon plating |
| D. | none of above |
| Answer» C. carbon plating | |
| 26. |
Electrolyte among following is |
| A. | NaOH |
| B. | urea |
| C. | glucose |
| D. | benzene |
| Answer» B. urea | |
| 27. |
Electrochemical cells convert |
| A. | mechanical energy in to electrical energy |
| B. | potential energy in to electrical energy |
| C. | kinetic energy in to electrical energy |
| D. | chemical energy in to electrical energy |
| Answer» E. | |
| 28. |
Conditions for good electroplating are |
| A. | high current density |
| B. | low temperature |
| C. | high concentration of metal in electrolyte |
| D. | all of above |
| Answer» E. | |
| 29. |
Lead and Zinc metals occur naturally as |
| A. | oxides |
| B. | sulphite ores |
| C. | carbon ores |
| D. | chloride ores |
| Answer» C. carbon ores | |
| 30. |
Oxidation-reduction reaction involves |
| A. | transfer of neutrons |
| B. | transfer of protons |
| C. | transfer of electrons |
| D. | none of above |
| Answer» D. none of above | |
| 31. |
As compare to iron, aluminum has |
| A. | higher tendency to oxidize |
| B. | less tendency to oxidize |
| C. | equal tendency to oxidize |
| D. | none of above |
| Answer» B. less tendency to oxidize | |
| 32. |
An electrochemical cell is also called |
| A. | battery cell |
| B. | galvanic cell |
| C. | cell |
| D. | chargeable cell |
| Answer» C. cell | |
| 33. |
In a dry cell anode is made up of |
| A. | zinc |
| B. | calcium |
| C. | sodium |
| D. | graphite |
| Answer» E. | |
| 34. |
Oxidation state of group IIIA metals is |
| A. | -3 |
| B. | 3 |
| C. | 0 |
| D. | 1 |
| Answer» C. 0 | |
| 35. |
Elements whose oxidation number is increased are |
| A. | reduced |
| B. | hydrogenated |
| C. | oxidized |
| D. | none of above |
| Answer» D. none of above | |
| 36. |
Loss of hydrogen atoms by an element is called |
| A. | hydrogenation |
| B. | oxidation |
| C. | reduction |
| D. | sublimation |
| Answer» C. reduction | |
| 37. |
An electrolytic cell uses electrical energy to drive |
| A. | chemical reaction |
| B. | physical reaction |
| C. | no reaction |
| D. | none of above |
| Answer» B. physical reaction | |
| 38. |
Electrolyte used for tin plating is |
| A. | sulphide ore |
| B. | stannous sulphate |
| C. | hydrogen sulphate |
| D. | sodium chloride |
| Answer» C. hydrogen sulphate | |
| 39. |
Corrosion can be prevented by |
| A. | Alloying |
| B. | Tinning |
| C. | Galvanizing |
| D. | all of above |
| Answer» E. | |
| 40. |
On industrial scale sodium metal is prepared by electrolysis of fused |
| A. | NaOH |
| B. | NaCl |
| C. | NaO |
| D. | NH3 |
| Answer» C. NaO | |
| 41. |
Process in which substance gains electrons is called |
| A. | oxidation |
| B. | hydrogenation |
| C. | sublimation |
| D. | reduction |
| Answer» E. | |