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Start learning 50% faster. Sign in nowMost naphthalene is derived from coal tar. Typical coal tar is about 10% naphthalene by weight. Naphthalene in crystallized from coal tar fraction with boiling point 210-220°C than it is washed with sulphuric acid solution to remove theophany, with diluted alkali to remove phenol and, finally, is distilled. Also naphthalene is produced from heavy petroleum fractions during petroleum refining, but today petroleum-derived naphthalene represents only a minor component of production . Coal tar is brown or black liquid of extremely high viscosity. In the coal gas era, there were many companies in Britain whose business was distil coal tar to separate the higher-value fractions, such as naphtha, creosote and pitch.
In canning the slowest-heating point referred to as…….
All tissues except CNS/brain can use fat for:
Plate form test for milk does not include
In bread making, microorganisms are useful in development of ______ and ______ of the product (Both blanks need to be correct).
Which of the following is a Class II product?
An example of a biological hazard is:
Which of the following is an example of enzyme coagulated milk product?
a. Paneer
b. Dahl
c. Cheese
<...Drone bee is used in agriculture sector including
Amino acids joint together by forming……bonds.
