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The 'laughing gas' is

A. Nitrous oxide

B. Nitric oxide

C. Nitrogen trioxide

D. Nitrogen pentoxide

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

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  1. While the thermosetting polymers are amorphous in nature, the thermoplastic polymers are either amorphous…
  2. A cylindrical rod subjected to a tensile strain within the elastic limit undergoes a volume change.…
  3. __________ is not used as the control rod material in a nuclear reactor.
  4. Babbitt lining is used on brass/bronze bearings to increase the
  5. Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles…
  6. Cold chisels hammers are made of
  7. Chlorine acts as a bleaching agent only in the presence of
  8. For a spontaneous natural process at constant temperature and pressure, the free energy of the system…
  9. Bad odour in sanitary latrines is reduced by periodically sprinkling
  10. Electrolytic reduction cell used for conversion of calcined Al2O3 to Al is a carbon lined furnace operating…
  11. The bank of tubes located at the back of the domestic refrigerators are the __________ tubes.
  12. Which of the following has the least value of ultimate tensile strength (UTS)?
  13. Fine grained steels have
  14. Nickel is a __________ material.
  15. The dimensional formula of bulk modulus of elasticity is same as that of the
  16. Strain hardening effect in a metal subjected to cold working is due to the __________ mechanism.
  17. Unit of surface tension in S.I. unit is
  18. Dies for wire drawing are generally made of
  19. When the wavelength of incident X-rays increases, the angle of diffraction
  20. Projection welding & stud welding is categorised as the __________ welding.
  21. Tip of the match stick contains a mixture of
  22. Brinell Hardness Number (BHN) for talc is approximately in the range of
  23. In condensers used in thermal power plants, steam is normally used in shell side and cooling water on…
  24. __________ number determines whether the fluid flow in an open channel is supercritical, critical or…
  25. Wave length of X-rays is about 1 angstrom; however it cannot pass through a sheet of
  26. __________ is the most important element, which controls the physical properties of steel.
  27. Compressed dry air is used as the cutting fluid, while machining
  28. During decarburising of a plain carbon steel, the thickness of ferrite layer growth is proportional…
  29. High endurance limit of carburised machine parts is because of the fact that carburisation
  30. Angular displacement can be measured suitably by a