Vacuum steel degassing units are lined with
high alumina bricks
Impure camphor is purified by
sublimation
Which of the following is the best criteria of purity of organic compounds?
Mixed melting point
One of the raw materials used in preparing ethyne (C2H2) contains a number of impurities. Two of these impurities are
calcium sulfide and calcium phosphide
Concentration of a solution expressed in terms of __________ is independent of temperature.
molality
The major component used in preparation of different types of glasses is :
Silica
The rate constant of a first order reaction depends on the
temperature
The reactions catalyzed by sunlight are called reactions
Photochemical
The ratio of lateral strain to linear strain is termed as the
Poisson's ratio
Which of the following does not figure in the list of seven substances selected for international temperature scale ?
Zinc (B.P) and mercury (F.P)
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