A polymer is termed as an 'elastomer', if its percentage elongation is more than 100%. An elastomer is termed as 'rubber' if its percentage elongation is more than __________ percent.

A. 150

B. 200

C. 300

D. 400

Please do not use chat terms. Example: avoid using "grt" instead of "great".

You can do it
  1. A common disinfectant used in village wells for disinfection of water is
  2. Probability of cavitation occuring becomes very high, when the local __________ resulting in water bubbles…
  3. The condition of diffraction from a crystal is given by
  4. Which of the following has the least value of ultimate tensile strength (UTS)?
  5. An ideal material for making cooking vessels should have
  6. Sand used to stop the green sand from sticking to the pattern is termed as the __________ sand.
  7. Pressure required to increase the density of water by about 1% is __________ atmosphere.
  8. Which of the following approaches the ideal gas behaviour most closely?
  9. The cooling rate required to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours is __________…
  10. Addition of silicon to cast iron
  11. Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air…
  12. Atomic __________ is a whole number for an element.
  13. __________ of hard alloy and tool steel is done to make it easily machinable.
  14. Calorific value of __________ are almost same.
  15. 'Cryogenics' is concerned with the generation & use of low temperature in the range of
  16. Which of the following is not a characteristic observed in material failure by fatigue fracture?
  17. A steam carrying pipeline is insulated with two layers of insulating materials with the inferior insulation…
  18. The fugacity of liquid water at 298 K is approximately 3171 Pa. Considering the ideal heat of vaporisation…
  19. Which of the following terminology is used for the temperature at which new grains are formed in a metal?
  20. Silicon percentage in silicon steel used for electrical equipments is about
  21. Filler material used in welding should have __________ as compared to the parent metal to be welded.
  22. Work required for compression of a gas contained in a cylinder is 7000 kJ. During compression, heat…
  23. In the acid Bessemer process, the hot metal should have the following composition.
  24. Auto collimator is used to check
  25. Pick out the wrong conversion of absolute & kinematic viscosities.
  26. A spring material should have low
  27. Property responsible for the talcum powder to cling to the skin is the
  28. The transition temperature at which all the ferromagnetic materials become paramagnetic materials is…
  29. Electrostatic separation of minerals from each other is based on their differences in the following…
  30. Ammonia leakage in the refrigeration system is detected by