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Yogita Ingle 5 years, 4 months ago
Invar is a 36% nickel iron alloy which has the lowest thermal expansion among all metals and alloys in the range from room temperature up to approximately 230°C. The Invar alloy is ductile and easily weldable, and machinability is similar to austenitic stainless steel.
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Yogita Ingle 5 years, 6 months ago
A homologous series is a series of carbon compounds that have different numbers of carbon atoms but contain the same functional group.
For example, methane, ethane, propane, butane, etc. are all part of the alkane homologous series.
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Yogita Ingle 5 years, 6 months ago
We produce Hydrogen Chloride in the laboratory by treating sodium chloride with concentrated sulphuric acid. We, then, heat this mixture up to 420K.
420K
NaCl + H2SO4 → NaHSO4 + HCl
We get Sodium bisulphate as a by-product. This is insoluble. Therefore, we further mix it with more sodium chloride. This mixture has to be further warmed to a higher temperature of around 823K. It gives dissolvable sodium sulfate and HCl gas.
823K
NaHSO4 + NaCl → Na2SO4 + HCl
We dry this HCl by treating it with concentrated sulphuric acid. HCl is not dried over phosphorus pentoxide or brisk lime. This is because it reacts with both of these compounds.
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Harsimran Singh? 5 years, 2 months ago
3Thank You