how is rrb model question paper for science junior engineer
gr.II
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PVC is obtained by the polymerization of 1 Propene 2 Vinyl chloride 3 Styrene 4 Acetylene
What are comets?
Soda-acid fire extinguisher involves the reaction between 1 Sodium hydroxide and nitric acid 2 Sodium bi carbonate and sulphuric acid 3 Sodium sulphate and carbonic acid 4 Sodium carbonate and hydrochloric acid
When was the first rocket launched from thumba?
Which of the following are the ingredients of gun metal? 1 Iron, Tin 2 Copper, Tin 3 Iron, Brass, Tin 4 Iron, Zinc, Titanium
what are the advantages and disadvantages of rational knowledge?
infra-red rays were first detected by? the intensity level of sound is measured in? the material used for a fuse wire should? radioactivity is a property of? what is the source of electric energy in an artificial satellite? the following is used as a lubricant in heavy machines? supher, bauxite , graphite, phosphorus
Why we use nhexane inplace of hexane in mobilepase preparation
Which isotope of Uranium is capable of sustaining chain reaction ?
why we can't make our living room as refrigerator?
Actinides are the elements with atomic numbers from 1 36 to 43 2 89 to 103 3 97 to 114 4 101 to 115
describe the function of muscles