प्रशासनिक कर्मचारी वर्ग के लिए हिंदी का प्रशिक्षण किस आयु तक देना अनिवार्य है?
The correct answer is A
The gas usually causing explosions in coal mines is-
The major component of honey is-
The fuel that is used in modern submarines is -
Bronze is an alloy of-
The chemical name of'Common salt’
The acid used in lead storage cells is-
___________ is the process in which acids and bases react to form salts and water.
Urea is a —
The important ore of aluminium is-
The element used in the manufacture of safety matches is —