49. Aluminium salt commonly used to stop bleeding is A.Aluminium nitrate B.Aluminium sulphate C.Aluminium Chloride D.Potash alum
Answer: Option B Solution: Nitrate (NO3) is the most common form of inorganic nitrogen in unpolluted waters. Nitrate moves readily through soils and into ground water, where concentrations can be much higher than in surface waters. Water in coastal areas mainly contains elementary nitrogen gas (N2).
