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Glass reacts with

A. H2SO3

B. HF

C. HNO3

D. K2Cr2O7

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  1. Energy to be supplied to the radioactive nucleus for the emission of a neutron is __________ MeV.
  2. While the oxy-acetylene flame produces a temperature of 3200°C, the temperature produced by oxy-hydrogen…
  3. For a spontaneous natural process at constant temperature and pressure, the free energy of the system…
  4. Hardening of steel is not possible, unless it is heated __________ critical point.
  5. Leakage in a cooking gas cylinder is detected by
  6. Silicon percentage in silicon steel used for electrical equipments is about
  7. Propulsion of rocket follows from the
  8. __________ is not used as a material of construction in thermocouples.
  9. About __________ ton of coke is required in a cupola to produce one ton of casting.
  10. Fog is an example of colloidal system of
  11. Pick out the wrong statement.
  12. Pick out the wrong statement about coating/electroplating of metals.
  13. Notched bar test is used for testing the __________ of a material.
  14. Flue gases pass through the following boiler accessories in a high pressure natural circulation boiler.A.…
  15. Circular cross section machine parts which are symmetrical about the axis of rotation are made by hot
  16. Steel is welded using the __________ flame.
  17. Volumetric composition of flue gas analysed with the Orsat apparatus is : CO2 = 12%, O2 = 8%, CO = nil,…
  18. Which of the following is a commonly used manometric liquid for low pressure range?
  19. Atomic __________ of an element is a whole number.
  20. Liquid nitrogen containers can be made from
  21. CANDU type nuclear reactor using natural uranium as fuel is the extensively used nuclear reactor because…
  22. Steel rods are normally used for concrete reinforcement because concrete and steel have almost equal
  23. Hot & cold working of material causes its __________ deformation.
  24. Magnesium is present in
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  26. Brazing filler metal used for joining steel plates
  27. Solidification time of a molten metal in a casting is proportional to (where, V = volume of metal &…
  28. Superheating of steam is done at constant
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  30. Ammonia leakage in the refrigeration system is detected by