Energy of the sun arises mainly from __________ reactions.

A. Fusion

B. Fission

C. Combustion

D. None of these

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  1. Identify the false statement
  2. 'Amortization' in respect of financial obligation of a company means the
  3. The life of a ball bearing is inversely proportional to
  4. For the irreversible reaction, Ca+ 2C = Ca C2 , Δ H°298 = - 60000 J . mole-1 . If a system…
  5. Pipelines carrying various utilities in chemical industries are identified by their colour codes. The…
  6. The following type of bonding is strongly directional in solids.
  7. Damage to metal surface by mechanical action is called
  8. Friction factor for fluid flow in pipe does not depend upon the
  9. In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold…
  10. Between 230 and 370°C, blue brittleness is caused in mild steel because of the
  11. A reduction in thermal resistance during heat transfer does not occur in the
  12. Use of flux during soldering is done to
  13. On oscilloscope screen for dynamic measurement, lissajous diagram is normally used to determine the…
  14. The ratio of the shear stress to the principal stress on a principal plane is
  15. Work required for compression of a gas contained in a cylinder is 7000 kJ. During compression, heat…
  16. On decreasing the grain size of a polycrystalline material, the property most likely to deteriorate…
  17. Fibrous fracture is normally encountered in the __________ materials.
  18. Corona discharge is related to the operation of a/an
  19. __________ of air does not increase with increase in temperature.
  20. When an isolated thermodynamic system executes a process,
  21. The activity of pure hydrogen gas at 1000°C and 5 atm pressure
  22. The joint for soldering is supported by binding wire made of
  23. Which of the following is not categorised as the ore agglomeration process?
  24. Unit of surface tension in S.I. unit is
  25. Out of the following, the best material capable of withstanding shock & vibration without the danger…
  26. Pick out the wrong statement about coating/electroplating of metals.
  27. A polymer is termed as an 'elastomer', if its percentage elongation is more than 100%. An elastomer…
  28. Which of the following is not an ore of copper?
  29. Heating of ferromagnetic materials to a temperature above Curie temperature makes it
  30. Maximum hardenability of steel depends upon its