Chemical Process
During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond 160°C, as

Its viscosity is not reduced on further heating (hence pressure drop on pumping it, cannot be further reduced)
It is very corrosive at elevated temperature
It decomposes on further increasing the temperature
None of these

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Chemical Process
Pick out the wrong statement pertaining to nitric acid.

Yellow color of impure nitric acid is because of dissolved oxides of nitrogen (mainly NO₂)
It is a strong mono basic acid which reacts with almost all the metals except noble metals
About 90% of nitric acid is manufactured by Ostwald
Arc process of nitric acid manufacture is economical as compared to Ostwald

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Chemical Process
Nylon 66 is so named because the

Average degree of polymerisation of the polymer is 1966
Number of carbon atoms between two nitrogen atoms are 6
Number of nitrogen atoms between two carbon atoms are 6
Polymer was first synthesised in 1966

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