Question
When is “World Biofuel Day” observed worldwide?
Solution
The day is observed in honour of Sir Rudolf Diesel, inventor of the diesel engine. It is observed to spread awareness about unconventional sources of fuels that could work as an alternative to fossil fuels.
_________is the process in which acids and bases react to form salts and water.
The element used for making solar cells is
The fuel that is used in modern submarines is -
The noble gas used in radiotherapy is
The gas used for filling weather balloons is-
The pH of a neutral solution is —Â
The most reactive among the halogens is-
The element used in the manufacture of safety matches is —
Which metal is extracted from seawater?
The fuel that is used in modern submarines is -