The ratio of actual evapo-transpiration to potential evapo-transpiration is in the range
(A) 0.0 to 0.4
(B) 0.6 to 0.9
(C) 0.0 to 1.0
(D) 1.0 to 2.0
The ratio of actual evapo-transpiration to potential evapo-transpiration is in the range
(A) 0.0 to 0.4
(B) 0.6 to 0.9
(C) 0.0 to 1.0
(D) 1.0 to 2.0
A sample of domestic sewage is digested with silver sulphate, sulphuric acid, potassium dichromate and mercuric sulphate in chemical oxygen demand (COD) test. The digested sample is then titrated with standard ferrous ammonium sulphate (FAS) to determine the un-reacted amount of
(A) mercuric sulphate
(B) potassium dichromate
(C) silver sulphate
(D) sulphuric acid
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