ATQ, 10000 – 999 = 9001
The pH of a neutral solution is —
The important ore of aluminium is-
The fuel that is used in modern submarines is -
The gas usually causing explosions in coal mines is-
The most reactive among the halogens is-
The gas used for filling weather balloons is-
The nucleus of an atom consists of-
Urea is a —
___________ is the process in which acids and bases react to form salts and water.
Which of the following is a physical change?