MCQOPTIONS
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MCQOPTIONS
This section includes 37 Mcqs, each offering curated multiple-choice questions to sharpen your Organic Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Burning of hydrogen |
| A. | acts as fuel in rockets etc. |
| B. | is an endothermic reaction |
| C. | results in acid rains |
| D. | is fatal for plant habitats |
| Answer» B. is an endothermic reaction | |
| 2. |
In the electrolysis of brine, ions moving to the cathode include |
| A. | hydroxide ions |
| B. | sodium + hydrogen ions |
| C. | hydrogen gas is bubbled off |
| D. | chloride ions |
| Answer» C. hydrogen gas is bubbled off | |
| 3. |
The molar mass of potassium hydrogen carbonate KHCO3 is |
| A. | 100.115g/mol |
| B. | 90.15g/mol |
| C. | 119.21g/mol |
| D. | 111.127g/mol |
| Answer» B. 90.15g/mol | |
| 4. |
Nitric acid manufacturing requires catalyst of |
| A. | iron |
| B. | vanadium oxide |
| C. | nickel |
| D. | platinum |
| Answer» E. | |
| 5. |
A strong electrolyte solution makes a bulb |
| A. | shine dimly |
| B. | shine brightly |
| C. | None of Above |
| D. | does not shine at all |
| Answer» C. None of Above | |
| 6. |
Metals are good at |
| A. | donating electrons |
| B. | accepting electrons |
| C. | producing electricity |
| D. | insulation |
| Answer» B. accepting electrons | |
| 7. |
Onion juice is |
| A. | alkaline |
| B. | acidic |
| C. | basic |
| D. | neutral |
| Answer» C. basic | |
| 8. |
To balance Al(OH)3 + HNO3 → Al(NO3)3 + H2O, number of HNO3 molecules required will be |
| A. | 4 |
| B. | 2 |
| C. | 8 |
| D. | 6 |
| Answer» E. | |
| 9. |
Rare freezing of sea water can be explained through |
| A. | presence of impurities like salts |
| B. | lowering the freezing point of water |
| C. | elevation of the boiling point |
| D. | presence of breathing animals in it |
| Answer» B. lowering the freezing point of water | |
| 10. |
In deuterium, the number of neutrons are |
| A. | 2 |
| B. | 3 |
| C. | 0 |
| D. | 1 |
| Answer» E. | |
| 11. |
Less vitamins and valuable nutrients are destroyed if the |
| A. | larger food particles are cooked |
| B. | smaller particles are cooked |
| C. | if food is fried |
| D. | if food is frozen |
| Answer» C. if food is fried | |
| 12. |
Sodium is not |
| A. | a salt |
| B. | insoluble in water |
| C. | stable in air |
| D. | explosive in air |
| Answer» D. explosive in air | |
| 13. |
KOH, NaOH and CuSO4 solutions are |
| A. | non-electrolyte |
| B. | strong electrolyte |
| C. | None of Above |
| D. | weak electrolyte |
| Answer» C. None of Above | |
| 14. |
Hydrogen acts as a redundant, |
| A. | by giving electrons |
| B. | by taking oxygen |
| C. | None of Above |
| D. | Both A and B |
| Answer» E. | |
| 15. |
In CuO and CO reaction, oxidizing agent is |
| A. | CO |
| B. | CuO |
| C. | CO2 |
| D. | Cu |
| Answer» C. CO2 | |
| 16. |
Milk has a pH of |
| A. | 6 |
| B. | 3 |
| C. | 12 |
| D. | 9 |
| Answer» B. 3 | |
| 17. |
Acids reacts with metal carbonates to form |
| A. | water |
| B. | salt |
| C. | all of these |
| D. | carbon dioxide |
| Answer» D. carbon dioxide | |
| 18. |
Energy conservation mechanisms do not include |
| A. | insulating cavity walls with polyurethane |
| B. | insulating lofts with pylons |
| C. | prevention of heat loss |
| D. | double glazing windows |
| Answer» C. prevention of heat loss | |
| 19. |
Metals are malleable and ductile due to |
| A. | rigidity of metals |
| B. | van der Waals' forces |
| C. | high pressures |
| D. | non-rigidity of metals |
| Answer» E. | |
| 20. |
Displacement reaction occurs when |
| A. | a more reactive metal displaces a less reactive metal |
| B. | a more reactive non-metal displaces less reactive non-metals |
| C. | Both A and B |
| D. | None of These |
| Answer» D. None of These | |
| 21. |
Electrodes refer to the |
| A. | the metal plates carrying electricity in the liquid |
| B. | switches in a battery |
| C. | anode |
| D. | cathode |
| Answer» B. switches in a battery | |
| 22. |
Consider the equation: Fe+3 (aq) + 3OH- (aq) → Fe(OH)3 (s). The precipitate of iron (III) hydroxide will be of |
| A. | blue color |
| B. | green color |
| C. | white color |
| D. | brown color |
| Answer» E. | |
| 23. |
To balance Cu + H2SO4 → CuSO4 + H2O + SO2; number of H2SO4 molecules will be |
| A. | 2 |
| B. | 1 |
| C. | 4 |
| D. | 3 |
| Answer» B. 1 | |
| 24. |
Due to hydrogen bonds in water, water |
| A. | has high boiling and melting points |
| B. | has high van der Waals' forces |
| C. | is a poor conductor of electricity |
| D. | has many valence electrons |
| Answer» B. has high van der Waals' forces | |
| 25. |
If NaOH(aq) reacts with HCl(aq), the reaction can be called as |
| A. | Thermal decomposition |
| B. | combustion |
| C. | Respiration |
| D. | Neutralization |
| Answer» E. | |
| 26. |
Cathodic reduction refers to |
| A. | gain of electrons at the cathode |
| B. | loss of electrons at the anode |
| C. | gain of electrons at the anode |
| D. | loss of electrons at the cathode |
| Answer» B. loss of electrons at the anode | |
| 27. |
Carbon dioxide diffuses |
| A. | slowly than oxygen |
| B. | slowly than hydrogen |
| C. | faster than oxygen |
| D. | faster than hydrogen |
| Answer» B. slowly than hydrogen | |
| 28. |
HOW_MANY_MOLES_OF_KMNO4_ARE_REQUIRED_FOR_COMPLETE_OXIDATION_OF_1.25_MOL_CU2S??$ |
| A. | |
| B. | 1 mole |
| C. | 3 moles |
| Answer» D. | |
| 29. |
What is the volume strength of H2O2 of its 11.2 ml requires 30 ml of 0.5 M K2Cr2O7?$ |
| A. | 35 |
| B. | 55 |
| C. | 25 |
| D. | 45 |
| Answer» E. | |
| 30. |
How many moles of KCI are required to produce 10 mol Cl2 by the reaction with KCIO3? |
| A. | 1.66 mole |
| B. | 13.33 mole |
| C. | 0.66 mole |
| D. | 16.66 mole |
| Answer» E. | |
| 31. |
What is the concentration of H2O2 solution of 20 ml of H2O2 solution which will react completely with 10 ml of 2 M KMnO4 in acidic medium? |
| A. | 1.25 M |
| B. | 5 M |
| C. | 2.5 M |
| D. | 25 M |
| Answer» D. 25 M | |
| 32. |
What is the mass of Fe304 if it reacts completely with 25 ml of 0.3m K2Cr2O7? |
| A. | 1 .44 g |
| B. | 10.44 g |
| C. | 104.4 g |
| D. | 14.4 g |
| Answer» C. 104.4 g | |
| 33. |
What is the volume of 0.05 M KMnO4 which will react with 50 ml of 0.1 M H2S in acidic medium (H2S ‚Üí S02)?$ |
| A. | 60 ml |
| B. | 6 ml |
| C. | 12 ml |
| D. | 120 ml |
| Answer» E. | |
| 34. |
What is the mass of K2Cr2O7 required to produce 254 gm I2 from KI solution? Given: K2Cr2O7 + 2KI ‚Üí 2Cr3+ + I2$ |
| A. | 49 g |
| B. | 98 g |
| C. | 9.8 g |
| D. | 4.9 g |
| Answer» C. 9.8 g | |
| 35. |
How many number of moles of KMnO4 will react with 180 gm H2C2O4 according to given reaction? |
| A. | |
| B. | 4/5 |
| C. | 2/5 |
| Answer» B. 4/5 | |
| 36. |
Excess of KI reacts with CuSO4 solution and then Na2S2O3 solution is added to it. Which of the statement is incorrect for this reaction? |
| A. | Na<sub>2</sub>S<sub>2</sub>O<sub>3</sub> is oxidized |
| B. | CuI<sub>2</sub> is formed |
| C. | Cu<sub>2</sub>I<sub>2</sub> is formed |
| D. | Evolved I<sub>2</sub> is reduced |
| Answer» C. Cu<sub>2</sub>I<sub>2</sub> is formed | |
| 37. |
KMnO4 reacts with oxalic acid according to the equation given below. Here 20 mL of 0.1 M KMnO4 is equivalent to how many mL and molarity of H2C2O4? |
| A. | |
| B. | 20 mL of 0.5 M H<sub>2</sub>C<sub>2</sub>O<sub>4</sub> |
| C. | 50 mL of 0.5 M H<sub>2</sub>C<sub>2</sub>O<sub>4</sub> |
| Answer» D. | |