The difference between the amounts of dissolved oxygen in a sample of water saturated with oxygen and that after incubation for a period of 5 days is known as.

Discuss the importance of dissolved oxygen in water.

Determine the amount of 'CaCl_2(i=2.47)' dissolved in 2.5 litre of water such that its osmotic pressure is '0.75 atm' at '27^circ C'

The process of 'eutrophication' is due to : increase in concentration of insecticide in water, increase in concentration of fluoride ion in water, The reduction in concentration of the dissolved oxygen in water due to phosphate pollution in water, attack of younger leaves of a plant by peroxyacetyl nitrate.

An unknown sample weighing 1.5 g was found to contain only Mn and S. The sample was completely reacted with oxygen and it produced 1.22 g of Mn(II) oxide and 1.38 g of SO_(3) .What is the simplest formula for this compound? (MnS)

Assertion : Crude salt is dissolved in minimum amount of water and filtrate is saturated with HCl gas, CaCl_(2) and MgCl_(2) remains in solution while NaCl separates out. Reason : Solubility of NaCl is more than that of CaCl_(2) and MgCl_(2)

4.008 g of pure KCIO_(3) , was quantitatively decomposed to give 2.438 g of KCl and oxygen. KCl was dissolved in water and treated with AgNO, solution. The result was a precipitate of AgCl weighing 4.687 g. Under further treatment, AgCl was found to contain 3.531 g of Ag. What are the atomic weights of Ag, Cl and K relative to O = 16?