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Page 1 Liquid Crystal Technology MCQ’s 1 1. Liquid crystal was first observed by a. Botanist b. Chemist c. Physicist d. Zoologist 2. Liquid crystal was first observed by a. Robert Hook b. William Reinteizer c. Friendrich Reinteizer d. Robert Reinteizer 3. The amount of energy needed for a phase transition is called a. Heat of fusion b. Heat of transition c. Latent heat of transition d. Latent heat of fusion 4. Which type of molecules shows the molecular arrangement shown in following figure a. Solid b. liquid c. Gaseous d. Liquid crystal 5. First liquid crystal phase discovered in a compound: a. Cholesteryl benzoate b. Cholesteryl proponoate c. Cholesteryl ethanoate d. Cholesteryl methaoate 6. Transition temperature of Cholesteryl benzoate is: a. 145°C b. 165°C c. 126°C d. 178°C 7. Melting point of Cholesteryl benzoate is: a. 145°C b. 165°C c. 125°C d. 178°C 8. Mesomorphic state refers to: a. Solid state b. Liquid state c. Liquid crystal state d. Gaseous state 9. The point at which solid changes into turbid liquid (liquid crystals) is known as a. Melting point b. Transition point c. boiling point d. Eutectic point 10. The point at which turbid liquid changes into clear liquid is called a. Melting point b. Transition point c. Eutectoid point d. Eutectic point 11. How many triple points are shown by following curve ? Page 2 Liquid Crystal Technology MCQ’s 1 1. Liquid crystal was first observed by a. Botanist b. Chemist c. Physicist d. Zoologist 2. Liquid crystal was first observed by a. Robert Hook b. William Reinteizer c. Friendrich Reinteizer d. Robert Reinteizer 3. The amount of energy needed for a phase transition is called a. Heat of fusion b. Heat of transition c. Latent heat of transition d. Latent heat of fusion 4. Which type of molecules shows the molecular arrangement shown in following figure a. Solid b. liquid c. Gaseous d. Liquid crystal 5. First liquid crystal phase discovered in a compound: a. Cholesteryl benzoate b. Cholesteryl proponoate c. Cholesteryl ethanoate d. Cholesteryl methaoate 6. Transition temperature of Cholesteryl benzoate is: a. 145°C b. 165°C c. 126°C d. 178°C 7. Melting point of Cholesteryl benzoate is: a. 145°C b. 165°C c. 125°C d. 178°C 8. Mesomorphic state refers to: a. Solid state b. Liquid state c. Liquid crystal state d. Gaseous state 9. The point at which solid changes into turbid liquid (liquid crystals) is known as a. Melting point b. Transition point c. boiling point d. Eutectic point 10. The point at which turbid liquid changes into clear liquid is called a. Melting point b. Transition point c. Eutectoid point d. Eutectic point 11. How many triple points are shown by following curve ? Liquid Crystal Technology MCQ’s 2 a. Two b. Three c. Four d. One 12. Liquid crystal molecules have structure like: a. Cylinder b. Spherical c. Rod d. Circular 13. Liquid crystal which flow like near normal flow behavior of liquids a. Smectic liquid crystals b. Nematic liquid crystals c. Chlorestic liquid crystals d. None of above 14. The appearance of nematic phase of liquid crystal is a. Gel Like Substance b. Thread like substance c. Slippery substance d. Much thicker substance 15. Liquid crystal molecules possess: a. Transational order b. Vibrational order c. Intrinsic order d. Orientational order 16. The distinguishing characteristic of the liquid crystalline state is the tendency of the molecules (mesogens) to point along a common axis, is called a. Director b. Orientational order c. Positional order d. Theta 17. The amount of order is measured by: a. 3 cos 2 ?-1/2 b. 3 cos 2 ?-2/2 c. 3 cos 2 ?-1/3 d. 3 cos 2 ?-2/3 17. Order parameter depends upon a. Temperature b. Pressure c. Viscosity d. Surface Tension 18. In order parameter vs Temperature graph, Tc refers to: a. Critical temperature b. Transition temperature c. Melting point d. Boiling point Page 3 Liquid Crystal Technology MCQ’s 1 1. Liquid crystal was first observed by a. Botanist b. Chemist c. Physicist d. Zoologist 2. Liquid crystal was first observed by a. Robert Hook b. William Reinteizer c. Friendrich Reinteizer d. Robert Reinteizer 3. The amount of energy needed for a phase transition is called a. Heat of fusion b. Heat of transition c. Latent heat of transition d. Latent heat of fusion 4. Which type of molecules shows the molecular arrangement shown in following figure a. Solid b. liquid c. Gaseous d. Liquid crystal 5. First liquid crystal phase discovered in a compound: a. Cholesteryl benzoate b. Cholesteryl proponoate c. Cholesteryl ethanoate d. Cholesteryl methaoate 6. Transition temperature of Cholesteryl benzoate is: a. 145°C b. 165°C c. 126°C d. 178°C 7. Melting point of Cholesteryl benzoate is: a. 145°C b. 165°C c. 125°C d. 178°C 8. Mesomorphic state refers to: a. Solid state b. Liquid state c. Liquid crystal state d. Gaseous state 9. The point at which solid changes into turbid liquid (liquid crystals) is known as a. Melting point b. Transition point c. boiling point d. Eutectic point 10. The point at which turbid liquid changes into clear liquid is called a. Melting point b. Transition point c. Eutectoid point d. Eutectic point 11. How many triple points are shown by following curve ? Liquid Crystal Technology MCQ’s 2 a. Two b. Three c. Four d. One 12. Liquid crystal molecules have structure like: a. Cylinder b. Spherical c. Rod d. Circular 13. Liquid crystal which flow like near normal flow behavior of liquids a. Smectic liquid crystals b. Nematic liquid crystals c. Chlorestic liquid crystals d. None of above 14. The appearance of nematic phase of liquid crystal is a. Gel Like Substance b. Thread like substance c. Slippery substance d. Much thicker substance 15. Liquid crystal molecules possess: a. Transational order b. Vibrational order c. Intrinsic order d. Orientational order 16. The distinguishing characteristic of the liquid crystalline state is the tendency of the molecules (mesogens) to point along a common axis, is called a. Director b. Orientational order c. Positional order d. Theta 17. The amount of order is measured by: a. 3 cos 2 ?-1/2 b. 3 cos 2 ?-2/2 c. 3 cos 2 ?-1/3 d. 3 cos 2 ?-2/3 17. Order parameter depends upon a. Temperature b. Pressure c. Viscosity d. Surface Tension 18. In order parameter vs Temperature graph, Tc refers to: a. Critical temperature b. Transition temperature c. Melting point d. Boiling point Liquid Crystal Technology MCQ’s 3 19. Order parameter of liquid crystal is in range of a. 0-5 b. 0-10 c. 2-8 d. 1-10 20. Order parameter for liquid is a. 0 b. 1 c. 0-1 d. Infinity 21. Order parameter of solid is equal to a. 0 b. 1 c. 0-1 d. Infinity 22. Order parameter __________ with increase in temperature a. increases b. decreases c. does not change d. Abruptly increases 23. Lyotropic mesomorphism in a substance is introduced by a. Adding solute b. Increasing pressure c. Increasing temperature d. Adding Solvent 24. Thermrtropic mesomorphism in a substance is introduced by a. Adding solute b. Increasing pressure c. Increasing temperature d. Adding Solvent 25. Liquid crystal molecules possess a. Sinlgle indices of refraction b. Multiple indices of refraction c. Two different indices of refraction d. None of above 26. Which of the following is not a property of liquid crystals a. Long range order b. Flexible ends c. Rigid central region d. No functional groups 27. Liquid crystal state is also called as a. Triple phase b. Nematic phase c. Mesomorphic state d. Polymer dispersed phase 28. Which liquid phase has no positional order but the director n is at a constant tilt angle measured normal to the surface of the layer a. Smectic A b. Smectic B c. Smectic C d. Nematic 29. Under polarized light, nematic phase appears like a. Thread like b. Fan-like c. Rope-like d. Wheel-like 30. Which of the following property of liquid crystal resembles that of liquids a. Fluidity b. Anisotropy in magnetic properties c. Anisotropy in optical properties d. Double refraction Page 4 Liquid Crystal Technology MCQ’s 1 1. Liquid crystal was first observed by a. Botanist b. Chemist c. Physicist d. Zoologist 2. Liquid crystal was first observed by a. Robert Hook b. William Reinteizer c. Friendrich Reinteizer d. Robert Reinteizer 3. The amount of energy needed for a phase transition is called a. Heat of fusion b. Heat of transition c. Latent heat of transition d. Latent heat of fusion 4. Which type of molecules shows the molecular arrangement shown in following figure a. Solid b. liquid c. Gaseous d. Liquid crystal 5. First liquid crystal phase discovered in a compound: a. Cholesteryl benzoate b. Cholesteryl proponoate c. Cholesteryl ethanoate d. Cholesteryl methaoate 6. Transition temperature of Cholesteryl benzoate is: a. 145°C b. 165°C c. 126°C d. 178°C 7. Melting point of Cholesteryl benzoate is: a. 145°C b. 165°C c. 125°C d. 178°C 8. Mesomorphic state refers to: a. Solid state b. Liquid state c. Liquid crystal state d. Gaseous state 9. The point at which solid changes into turbid liquid (liquid crystals) is known as a. Melting point b. Transition point c. boiling point d. Eutectic point 10. The point at which turbid liquid changes into clear liquid is called a. Melting point b. Transition point c. Eutectoid point d. Eutectic point 11. How many triple points are shown by following curve ? Liquid Crystal Technology MCQ’s 2 a. Two b. Three c. Four d. One 12. Liquid crystal molecules have structure like: a. Cylinder b. Spherical c. Rod d. Circular 13. Liquid crystal which flow like near normal flow behavior of liquids a. Smectic liquid crystals b. Nematic liquid crystals c. Chlorestic liquid crystals d. None of above 14. The appearance of nematic phase of liquid crystal is a. Gel Like Substance b. Thread like substance c. Slippery substance d. Much thicker substance 15. Liquid crystal molecules possess: a. Transational order b. Vibrational order c. Intrinsic order d. Orientational order 16. The distinguishing characteristic of the liquid crystalline state is the tendency of the molecules (mesogens) to point along a common axis, is called a. Director b. Orientational order c. Positional order d. Theta 17. The amount of order is measured by: a. 3 cos 2 ?-1/2 b. 3 cos 2 ?-2/2 c. 3 cos 2 ?-1/3 d. 3 cos 2 ?-2/3 17. Order parameter depends upon a. Temperature b. Pressure c. Viscosity d. Surface Tension 18. In order parameter vs Temperature graph, Tc refers to: a. Critical temperature b. Transition temperature c. Melting point d. Boiling point Liquid Crystal Technology MCQ’s 3 19. Order parameter of liquid crystal is in range of a. 0-5 b. 0-10 c. 2-8 d. 1-10 20. Order parameter for liquid is a. 0 b. 1 c. 0-1 d. Infinity 21. Order parameter of solid is equal to a. 0 b. 1 c. 0-1 d. Infinity 22. Order parameter __________ with increase in temperature a. increases b. decreases c. does not change d. Abruptly increases 23. Lyotropic mesomorphism in a substance is introduced by a. Adding solute b. Increasing pressure c. Increasing temperature d. Adding Solvent 24. Thermrtropic mesomorphism in a substance is introduced by a. Adding solute b. Increasing pressure c. Increasing temperature d. Adding Solvent 25. Liquid crystal molecules possess a. Sinlgle indices of refraction b. Multiple indices of refraction c. Two different indices of refraction d. None of above 26. Which of the following is not a property of liquid crystals a. Long range order b. Flexible ends c. Rigid central region d. No functional groups 27. Liquid crystal state is also called as a. Triple phase b. Nematic phase c. Mesomorphic state d. Polymer dispersed phase 28. Which liquid phase has no positional order but the director n is at a constant tilt angle measured normal to the surface of the layer a. Smectic A b. Smectic B c. Smectic C d. Nematic 29. Under polarized light, nematic phase appears like a. Thread like b. Fan-like c. Rope-like d. Wheel-like 30. Which of the following property of liquid crystal resembles that of liquids a. Fluidity b. Anisotropy in magnetic properties c. Anisotropy in optical properties d. Double refraction Liquid Crystal Technology MCQ’s 4 31. Liquids possess a. anisotropy b. orientational order c. Isotropy d. positional order 32. Under polarized light, cholesteric liquid crystal have appearance like a. Finger print b. Thread c. helix d. fan 33. Which of the following property of liquid crystal resembles that of solids a. Fluidity b. Formation of droplets c. Anisotropy d. Isotropy 34. Which liquid crystal phase has fan like structure under polarized light ? a. Smectic b. Nematic c. Cholesteric d. Polymer dispersed 35. Which liquid crystal phase has gel like appearance? a. Smectic b. Nematic c. Cholesteric d. Polymer dispersed 36. Newtonian flow behavior is adopted by a. Nematic b. Smectic-A c. Smectic-B d. Smectic-C 37. The flow of true liquid is: a. Newtonian b. Non- Newtonian c. Far- Newtonian d. Near- Newtonian 38. Flow of Smectic liquid crystal is a. Newtonian b. Non- Newtonian c. Far- Newtonian d. Near- Newtonian 39. Nematic phase possess a. Positional order b. Translational order c. Orientational order d. Vibrational order 40. Pitch is measured in case of ________ liquid crystals a. Smectic b. Nematic c. Cholesteric d. Polymer dispersed 41. In the following diagram, ‘n’ represents a. Long axis of molecules b. Molecular axis c. Director d. Direction of molecules 42. Which type of molecules are depicted in following figure Page 5 Liquid Crystal Technology MCQ’s 1 1. Liquid crystal was first observed by a. Botanist b. Chemist c. Physicist d. Zoologist 2. Liquid crystal was first observed by a. Robert Hook b. William Reinteizer c. Friendrich Reinteizer d. Robert Reinteizer 3. The amount of energy needed for a phase transition is called a. Heat of fusion b. Heat of transition c. Latent heat of transition d. Latent heat of fusion 4. Which type of molecules shows the molecular arrangement shown in following figure a. Solid b. liquid c. Gaseous d. Liquid crystal 5. First liquid crystal phase discovered in a compound: a. Cholesteryl benzoate b. Cholesteryl proponoate c. Cholesteryl ethanoate d. Cholesteryl methaoate 6. Transition temperature of Cholesteryl benzoate is: a. 145°C b. 165°C c. 126°C d. 178°C 7. Melting point of Cholesteryl benzoate is: a. 145°C b. 165°C c. 125°C d. 178°C 8. Mesomorphic state refers to: a. Solid state b. Liquid state c. Liquid crystal state d. Gaseous state 9. The point at which solid changes into turbid liquid (liquid crystals) is known as a. Melting point b. Transition point c. boiling point d. Eutectic point 10. The point at which turbid liquid changes into clear liquid is called a. Melting point b. Transition point c. Eutectoid point d. Eutectic point 11. How many triple points are shown by following curve ? Liquid Crystal Technology MCQ’s 2 a. Two b. Three c. Four d. One 12. Liquid crystal molecules have structure like: a. Cylinder b. Spherical c. Rod d. Circular 13. Liquid crystal which flow like near normal flow behavior of liquids a. Smectic liquid crystals b. Nematic liquid crystals c. Chlorestic liquid crystals d. None of above 14. The appearance of nematic phase of liquid crystal is a. Gel Like Substance b. Thread like substance c. Slippery substance d. Much thicker substance 15. Liquid crystal molecules possess: a. Transational order b. Vibrational order c. Intrinsic order d. Orientational order 16. The distinguishing characteristic of the liquid crystalline state is the tendency of the molecules (mesogens) to point along a common axis, is called a. Director b. Orientational order c. Positional order d. Theta 17. The amount of order is measured by: a. 3 cos 2 ?-1/2 b. 3 cos 2 ?-2/2 c. 3 cos 2 ?-1/3 d. 3 cos 2 ?-2/3 17. Order parameter depends upon a. Temperature b. Pressure c. Viscosity d. Surface Tension 18. In order parameter vs Temperature graph, Tc refers to: a. Critical temperature b. Transition temperature c. Melting point d. Boiling point Liquid Crystal Technology MCQ’s 3 19. Order parameter of liquid crystal is in range of a. 0-5 b. 0-10 c. 2-8 d. 1-10 20. Order parameter for liquid is a. 0 b. 1 c. 0-1 d. Infinity 21. Order parameter of solid is equal to a. 0 b. 1 c. 0-1 d. Infinity 22. Order parameter __________ with increase in temperature a. increases b. decreases c. does not change d. Abruptly increases 23. Lyotropic mesomorphism in a substance is introduced by a. Adding solute b. Increasing pressure c. Increasing temperature d. Adding Solvent 24. Thermrtropic mesomorphism in a substance is introduced by a. Adding solute b. Increasing pressure c. Increasing temperature d. Adding Solvent 25. Liquid crystal molecules possess a. Sinlgle indices of refraction b. Multiple indices of refraction c. Two different indices of refraction d. None of above 26. Which of the following is not a property of liquid crystals a. Long range order b. Flexible ends c. Rigid central region d. No functional groups 27. Liquid crystal state is also called as a. Triple phase b. Nematic phase c. Mesomorphic state d. Polymer dispersed phase 28. Which liquid phase has no positional order but the director n is at a constant tilt angle measured normal to the surface of the layer a. Smectic A b. Smectic B c. Smectic C d. Nematic 29. Under polarized light, nematic phase appears like a. Thread like b. Fan-like c. Rope-like d. Wheel-like 30. Which of the following property of liquid crystal resembles that of liquids a. Fluidity b. Anisotropy in magnetic properties c. Anisotropy in optical properties d. Double refraction Liquid Crystal Technology MCQ’s 4 31. Liquids possess a. anisotropy b. orientational order c. Isotropy d. positional order 32. Under polarized light, cholesteric liquid crystal have appearance like a. Finger print b. Thread c. helix d. fan 33. Which of the following property of liquid crystal resembles that of solids a. Fluidity b. Formation of droplets c. Anisotropy d. Isotropy 34. Which liquid crystal phase has fan like structure under polarized light ? a. Smectic b. Nematic c. Cholesteric d. Polymer dispersed 35. Which liquid crystal phase has gel like appearance? a. Smectic b. Nematic c. Cholesteric d. Polymer dispersed 36. Newtonian flow behavior is adopted by a. Nematic b. Smectic-A c. Smectic-B d. Smectic-C 37. The flow of true liquid is: a. Newtonian b. Non- Newtonian c. Far- Newtonian d. Near- Newtonian 38. Flow of Smectic liquid crystal is a. Newtonian b. Non- Newtonian c. Far- Newtonian d. Near- Newtonian 39. Nematic phase possess a. Positional order b. Translational order c. Orientational order d. Vibrational order 40. Pitch is measured in case of ________ liquid crystals a. Smectic b. Nematic c. Cholesteric d. Polymer dispersed 41. In the following diagram, ‘n’ represents a. Long axis of molecules b. Molecular axis c. Director d. Direction of molecules 42. Which type of molecules are depicted in following figure Liquid Crystal Technology MCQ’s 5 a. Nematic b. Smectic A c. Smectic B d. Smectic C 43. In laptops, LCD's display material used is a. TN display material b. STN display material c. FLC display material d. ECB display material 44. The following arrangement is shown by a. Smectic A b. Smectic B c. Nematic d. Chlolestric 45. In diagram of Q. 44, what ‘a’ depicts? a. Director b. Pitch c. Half Pitch d. Length 46. Which application of Liquid crystal technology is influenced by ‘a’ ? a. Liquid crystal display b. Optical imaging c. Liquid crystal thermometer d. Thermography 47. In diagram of Q.44, which pattern is followed by its director in structure? a. Spherical b. Helical c. Circular d. Semi-circular 48. The molecules align in layers, this causes the director n orientation to rotate slightly between the layers, eventually bringing the molecules back into the original orientation. The distance required to achieve this is known as a. Director b. Half pitch c. Pitch d. Order 49. Thickness of layer of Chlolesteric phase is a. 50-500 molecules b. 500-5000 molecules c. 50-5000 molecules d. 500-500000 molecules 50. Which property changes the magnitude of pitch in cholesteric phase? a. Temperature b. Pressure c. Viscosity d. Surface tension 51. Layered structure is shown by a. Nematic b. SmecticRead More
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