Question
Main source of Naphthalene
Solution
Most 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.Â
A tribal festival called Medaram Jatara will soon get the tag of National Festival. This festival is observed in:
The Google Doodle marks legendary singer-composer Dr Bhupen Hazarika’s birth anniversary on 8th September, 2022. It was his ___ birth anniversary.
Which movie was selected as India’s official entry for the best foreign language film category of the 2019 Academy (Oscar) Awards?
Who had won the Best Actor Award at the 68th NAtional film Awards, 2022 held in New Delhi?
Kunchikal Falls is situated in which Indian state?
The most suitable soil for the cultivation of cotton is which of the following?
Which day is observed as World Immunization Day every year?
Rourkela Steel Plant is developed by the assistance of
Recently who has taken over as the Managing Director of the ONGC Videsh Limited?
Who assumed the role of the 12th Governor of Jharkhand recently?
Relevant for Exams:
