B
A
O
E
The use of Heat treatment of ore that includes smelting and roasting is termed as
The variety of coal in which the deposit contains recognizable traces of the original plant material is
The vast resources of unutilised natural gas can be used in the production of
The vector of disease sleeping sickness is
The vitamin which is generally excreted by humans in urine is
The vitamins which is generally excreted in urine is
The waste management technique that involves the use of microorganisms to remove or neutralize pollutants from contaminated site is called
The water from a hand pump is warm in winter as
The waves used in sonography are
The weight of 6.023 × 10²² atoms of carbon is
