MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 47 Mcqs, each offering curated multiple-choice questions to sharpen your Graduate Aptitude Test (GATE) knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The conductivity of micelles is |
| A. | Higher than a colloidal solution |
| B. | Lower than a colloidal solution |
| C. | Equals to colloidal solution |
| D. | None of the mentioned |
| Answer» B. Lower than a colloidal solution | |
| 2. |
Micelles behave as colloids only whena |
| A. | Concentration is less than CMC |
| B. | Concentration is equal to CMC |
| C. | Concentration is greater than CMC |
| D. | They always behave as colloids |
| Answer» D. They always behave as colloids | |
| 3. |
What is Critical Micelle Concentration? |
| A. | The maximum amount of concentration that is required for the formation of micelle |
| B. | The minimum amount of concentration that is required for the formation of micelle |
| C. | The maximum amount of concentration that is not required for the formation of micelle |
| D. | The minimum amount of concentration that is not required for the formation of micelle |
| Answer» C. The maximum amount of concentration that is not required for the formation of micelle | |
| 4. |
The transition of ions to micelle is |
| A. | Reversible |
| B. | Irreversible |
| C. | All of the mentioned |
| D. | None of the mentioned |
| Answer» B. Irreversible | |
| 5. |
Select the correct statement from the following options |
| A. | The soap micelle is unstable due to positive charge on its head |
| B. | The soap micelle is unstable due to positive charge on its head |
| C. | The soap micelle is unstable due to negative charge on its head |
| D. | The soap micelle is stable due to negative charge on its head |
| Answer» E. | |
| 6. |
Select the incorrect statement from the following options. |
| A. | In the micelle formation, the water soluble heads are directed towards the centre |
| B. | In the micelle formation, the water soluble heads are on the surface in contact with the water |
| C. | In the micelle formation, the water insoluble tails are directed towards the centre |
| D. | None of the mentioned |
| Answer» B. In the micelle formation, the water soluble heads are on the surface in contact with the water | |
| 7. |
The number of stearate ions required to form a micelle of colloidal size is |
| A. | 50 |
| B. | 60 |
| C. | 70 |
| D. | 80 |
| Answer» D. 80 | |
| 8. |
Which of the following is water insoluble? |
| A. | COO– |
| B. | Na+ |
| C. | C17H35 |
| D. | All of the mentioned |
| Answer» C. C17H35 | |
| 9. |
Which part of the stearate ion is hydrophilic in nature? |
| A. | Tail |
| B. | Hydrocarbon chain |
| C. | Head |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 10. |
What is the molecular formula of stearate ion? |
| A. | C17H35COO– |
| B. | C35H17COO+ |
| C. | C35H17COO– |
| D. | C17H35COO+ |
| Answer» B. C35H17COO+ | |
| 11. |
At what temperature does the water molecules contract? |
| A. | At 00C |
| B. | Below 00C |
| C. | At 40C |
| D. | Between 00C and 40C |
| Answer» E. | |
| 12. |
Which of the following possess lowest energy? |
| A. | NO |
| B. | O2 |
| C. | N2 |
| D. | CO |
| Answer» D. CO | |
| 13. |
O-nitrophenol is more volatile than p-nitrophenol due to |
| A. | Inductive effect |
| B. | Electromeric effect |
| C. | Inter-molecular hydrogen bonding in O-nitrophenol |
| D. | Intra-molecular hydrogen bonding in O-nitrophenol |
| Answer» E. | |
| 14. |
Which of the following is the consequence of hydrogen bonding? |
| A. | Abnormal boiling point |
| B. | Solubility and Viscosity |
| C. | Azeotropic behavior |
| D. | All of the mentioned |
| Answer» E. | |
| 15. |
Which of the following is not a necessary condition for the formation of intra-molecular hydrogen bonding? |
| A. | A 5 or 6-membered ring should be formed |
| B. | The ring should be planar |
| C. | There should be minimum strain during the ring closure |
| D. | There should be maximum strain during the ring closure |
| Answer» E. | |
| 16. |
Hydrogen bonding is maximum in |
| A. | Diethyl ether |
| B. | Ethyl chloride |
| C. | Ethanol |
| D. | Triethylamine |
| Answer» D. Triethylamine | |
| 17. |
Arrange the following molecules in the order of increasing boiling point. |
| A. | I2 < Br2 < Cl2 < F2 |
| B. | F2 < Cl2 < Br2 < I2 |
| C. | F2 < Br2 < Cl2 < I2 |
| D. | Cl2 < F2 < I2 < Br2 |
| Answer» C. F2 < Br2 < Cl2 < I2 | |
| 18. |
The strength of Vander Waals forces depends upon |
| A. | Size of the molecule |
| B. | Molecular structure |
| C. | Number of electrons present in the molecule |
| D. | All of the mentioned |
| Answer» E. | |
| 19. |
Which of the following has the highest bond dissociation energy? |
| A. | Covalent bond |
| B. | Vander Waals forces |
| C. | Dipole-dipole |
| D. | Hydrogen bond |
| Answer» B. Vander Waals forces | |
| 20. |
Which of the following is a microscopic property? |
| A. | Reactivity |
| B. | Inter-molecular force |
| C. | Boiling point |
| D. | Kinetic energy |
| Answer» C. Boiling point | |
| 21. |
The amplification factor for transistor when used as an amplifier will be |
| A. | 25 |
| B. | 50 |
| C. | 75 |
| D. | 100 |
| Answer» C. 75 | |
| 22. |
Which of the following is not an application of a transistor? |
| A. | Tunnel diodes |
| B. | Thermistors |
| C. | Amplifiers |
| D. | None of the mentioned |
| Answer» E. | |
| 23. |
The correct sequence for the procedure adopted for making a pure elemental semiconductor consist of |
| A. | Preparation of ultrapure Si or Ge>> Doping>> Preparation of single crystals of S |
| B. | Doping>> Preparation of ultrapure Si or Ge>> Preparation of single crystals of S |
| C. | Preparation of ultrapure Si or Ge>> Preparation of single crystals of Si or Ge>> Doping |
| D. | Preparation of single crystals of Si or Ge>> Preparation of ultrapure Si or Ge>> |
| Answer» D. Preparation of single crystals of Si or Ge>> Preparation of ultrapure Si or Ge>> | |
| 24. |
Optical fibre can be safely used for signal transmission near the nuclear installati |
| A. | There is no leakage of signals |
| B. | Plastic cladded silica fibres are resistant to nuclear radiations |
| C. | Plastic cladded silica fibres are not resistant to nuclear radiations |
| D. | There is no electromagnetic interference |
| Answer» C. Plastic cladded silica fibres are not resistant to nuclear radiations | |
| 25. |
What is the principle on which an optical fibre works? |
| A. | Total internal reflection |
| B. | Farraday’s law of induction |
| C. | Doppler Effect |
| D. | Hooke’s law |
| Answer» B. Farraday’s law of induction | |
| 26. |
The dielectric material that shows spontaneous and reversible dielectric polarisa |
| A. | Piezoelectrics |
| B. | Pyroelectrics |
| C. | Ferroelectrics |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 27. |
Identify the class of the superconductor to which TiO and NbO belong. |
| A. | Simple compounds |
| B. | Nonstoichiometric crystals having defects |
| C. | Charge-transfer compounds |
| D. | Molecular crystals |
| Answer» C. Charge-transfer compounds | |
| 28. |
The critical temperature for the cuprate La2CuO4 is |
| A. | 40 K |
| B. | 90 K |
| C. | 125 K |
| D. | 35 K |
| Answer» E. | |
| 29. |
The materials which offer no resistance to the passage of electricity are |
| A. | Superconductors |
| B. | Semiconductors |
| C. | Optical fibre |
| D. | Smart material |
| Answer» B. Semiconductors | |
| 30. |
Which compound imparts grey color, strength and hardness to the portland cement? |
| A. | Iron oxide |
| B. | Alumina |
| C. | Magnesium oxide |
| D. | Silica |
| Answer» B. Alumina | |
| 31. |
Which compound causes the cement efflorescent, if present in excess? |
| A. | Iron oxide |
| B. | Alkali oxide |
| C. | Sulphur trioxide |
| D. | Lime |
| Answer» C. Sulphur trioxide | |
| 32. |
The percentage composition of alumina in Portland cement is |
| A. | 60-69 |
| B. | 17-25 |
| C. | 3-8 |
| D. | 2-4 |
| Answer» D. 2-4 | |
| 33. |
All portland cements are hydraulic cement because of they |
| A. | Set and harden in the absence of water |
| B. | Set and harden in the presence of water |
| C. | Do not harden after mixing water |
| D. | None of the mentioned option |
| Answer» C. Do not harden after mixing water | |
| 34. |
Who is recognized as the “Father of the modern Portland cement industry”? |
| A. | Emil Abderhalden |
| B. | Richard Abegg |
| C. | Peter Agre |
| D. | William Aspdin |
| Answer» E. | |
| 35. |
Why Gypsum is added after calcination in the manufacture of Portland cement? |
| A. | To prevent flash setting |
| B. | To improve the quality of cement |
| C. | To increase the lime saturation factor |
| D. | None of the mentioned |
| Answer» B. To improve the quality of cement | |
| 36. |
Portland cement is made by calcining at temperature equals to |
| A. | 30000C |
| B. | 15000C |
| C. | 18000C |
| D. | 20000C |
| Answer» C. 18000C | |
| 37. |
Blast furnace slag is the mixture of |
| A. | Slaked lime and calcium silicate |
| B. | Aluminium silicate and hydrated lime |
| C. | Calcium silicate and aluminium silicate |
| D. | Silica, alumina and calcium oxide |
| Answer» D. Silica, alumina and calcium oxide | |
| 38. |
Select the incorrect statement from the following options. |
| A. | Puzzolona is the oldest cement invented by Romans |
| B. | Natural puzzolona is deposit of volcanic ash |
| C. | Puzzolona was used in making concrete for construction of walls and domes |
| D. | Puzzolona is quite setting cement and posses relatively low strength |
| Answer» E. | |
| 39. |
Which type of cement possesses hydraulic qualities? |
| A. | Natural |
| B. | Puzzolona |
| C. | Slag |
| D. | Portland |
| Answer» B. Puzzolona | |
| 40. |
Which of the following is not an application of nanomaterials? |
| A. | TV and computer monitors |
| B. | Cardiology |
| C. | Magnetic Resonance Imaging (MRI) |
| D. | Sunscreens and fuel cells |
| Answer» C. Magnetic Resonance Imaging (MRI) | |
| 41. |
Which one of the following is non-linear material? |
| A. | Zirconium oxide |
| B. | Magnetite |
| C. | Maghemite |
| D. | Lithium niobate |
| Answer» E. | |
| 42. |
Which type of material expands and contract in response to an applied electric field? |
| A. | Advanced material |
| B. | Smart material |
| C. | Biomaterial |
| D. | Nanomaterial |
| Answer» C. Biomaterial | |
| 43. |
Polymers are used in the chemical industry because of their |
| A. | Inert nature |
| B. | Light weight |
| C. | Low cost |
| D. | Easiness in fabricability |
| Answer» B. Light weight | |
| 44. |
Which one of the following is the best heat and corrosion resistant material? |
| A. | Metals |
| B. | Ceramics |
| C. | Polymers |
| D. | Semi-conductors |
| Answer» C. Polymers | |
| 45. |
Select the incorrect statement from the following option. |
| A. | Metals are extremely good conductors of heat and electricity |
| B. | The properties of metal degrade rapidly with temperature |
| C. | Metals have poor corrosion resistant |
| D. | A polished metal surface has a dull appearance |
| Answer» E. | |
| 46. |
Which of the following is not an aerospace material? |
| A. | Plastics |
| B. | Silica |
| C. | Aluminium alloys |
| D. | Polymers |
| Answer» E. | |
| 47. |
Based on the important category, concrete and fibre glass are the examples of |
| A. | Ceramics |
| B. | Polymers |
| C. | Composites |
| D. | Semi-conductors |
| Answer» D. Semi-conductors | |