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Downstream speed of the boat = 176/11 = 16 km/hr Upstream speed of the boat = 144/18 = 8 km/hr Speed of boat in still water = (16 + 8)/2 = 12 km/hr
“Firefighting clothes” are made from
Of the following which one pollutes the air of abig city?
The chiefsource for the production of nitrogeneous fertilizers is :
The gas that usually causes explosions in coal mines is
Which one of the following is an example of a gel?
Bakelite is a copolymer of Phenol and
Spirit in contact with body gives cool sensation because it is:
The Bhopal tragedy was caused by the gas
Which of the following processes is used for the production of Biodiesel?
Natural rubber is the polymer of: