Question
Who is the author of the book 'A Brief History of
Time'?Solution
'A Brief History of Time' is a popular-science book written by physicist Stephen Hawking and first published in 1988.
_________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 -