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QUESTIONS

Chemistry
The inexpensive and commonly used variety of glass is called soda glass.

was initially used for storing sodium carbonate
was used initially for making bottles of soda(carbonated drink)
is made using soda(sodium carbonate)
is made using soda lime

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Chemistry
The gas used in the manufacture of vanaspati from vegetable oil is

carbon dioxide
nitrogen
oxygen
hydrogen

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Chemistry
The ionic radii of N3-, O2-, F- and Na+ follows the order

O2- > F- > Na+ > N3-
N3- > O2- > F- > Na+
Na+ > O2- > N3- > F-
N3- > Na+ > O2- > F-

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Chemistry
The graphite rods in the nuclear reactor

react with U to release energy
convert fast moving neutrons into thermal neutrons
produce neutrons
undergo combustion which triggers the nuclear fission

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Steam Boilers, Engines, Nozzles and Turbines
The stage efficiency (ηS) is given by (where ηB = Blading efficiency, and ηN = Nozzle efficiency)

None of the listed here
ηS = ηB / ηN
ηS = ηN / ηB
ηS = ηB × ηN

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