Tip of the match stick contains a mixture of

A. K + S

B. K + S + K2Cr2O7

C. S + K2Cr2O7 + White P

D. None of these

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

You can do it
  1. Projection welding & stud welding is categorised as the __________ welding.
  2. Hot & cold working of material causes its __________ deformation.
  3. __________ flux is used for the extraction of metal from its self fluxing ores.
  4. Shrinkage allowance on pattern is provided to compensate for shrinkage when the
  5. Which of the following has the least value of ultimate tensile strength (UTS)?
  6. Which of the following is resistant to the action of both heat & chemicals?
  7. The boiling & freezing points on a newly defined temperature scale in degree 'D' are 400°D & 100°D…
  8. Resistance of an electrical conductor is proportional to its (where, l = length and A = cross-sectional…
  9. Oxide layer formed on the non-ferrous metal surface after its annealing is
  10. __________ are normally subjected to sub-zero treatment.
  11. Pick out the correct statement.
  12. __________ cannot increase the fatigue strength of a material.
  13. Which of the following is not a principal alloying element for the structural steel?
  14. Dryness fraction of dry steam is
  15. Air standard Otto cycle is more efficient than the diesel cycle for the same
  16. Nickel and __________ are the alloying element added in steel to increase its toughness.
  17. Case hardening is not done by
  18. Maximum hardenability of steel depends upon its
  19. Rankine cycle comprises of two isothermal and two __________ processes.
  20. In Imperial Smelting Process for extraction of zinc, zinc vapour thus produced is quenched in the external…
  21. Which of the following does not have a sharp melting point?
  22. Thermal efficiency of an internal combustion engine is around __________ percent.
  23. The passage between the nozzle and the __________ is called 'sprue' in case of injection moulding.
  24. Pick out the wrong statement.
  25. Runge-Kutta method is used to solve a/an
  26. Two solutions A1 & A2 have pH value of 2 & 6 respectively. It implies that the solution
  27. Which of the following can be manufactured using powder metallurgy techniques?
  28. A fire tube boiler is limited to a maximum steam pressure of about __________ kg/cm2.
  29. The excess air required for the combustion of pulverised coal is of the order of about __________ percent.
  30. Change in volume of metals from absolute zero temperature to their melting points is