Why is coal crushed to a powder before being fed into a boiler?

Q Write Notes on Fermentation
Q Which patron saint of Lahore and one of the finest embodiments of inter-faith harmony was asked by Guru Arjun Dev to lay the first stone of the Golden Temple on January 15, 1588 AD?
Q Besides Mahrashtra, Karnataka and Goa, which is the fourth State for Konkan Railway Project?
Q What name was given to a legendary substance believed to turn base metals (notably lead) into gold or silver?
Q Which US president greeted astronauts Neil Armstrong, Michael Collins and Buzz Aldrin when they got back from the moon?
Q Cornbread, Turkey and Sweet potatoes made up the first what
Q Where is Olympic Museum located?
Q What are the main types of objects used in rhino?
Q What benefit does strict two-phase locking provide? what disadvantages result?
Q Explain the absence of supply curve under monopoly with the help of a relevant diagram.
Q what is refractory period