C12H12N-NaO8S2 is the chemical formula of ______?
A. Activated charcoal
B. Azomethine H
C. Carbonated sodium sulphate
D. None of the above
The formula used for calculating RSC is _____?
A. RSC=(CO32 + HCO2) (Na + K + Ca2 + Mg2)
B. RSC=(CO32 + HCO2) ( Ca2 + Mg2)
C. None of the above
D. non of these
While handing concentrated acids. bases or other hazardous chemicals use ___?
A. Table
B. Fume hoods
C. Both a & b
D. None of the above
An expression of the intensity of the basic or a acidic condition of a liquid or of soil is called _________?
A. ESR
B. SAR
C. EC
D. pH
The conductivity of a saturation extract is greater 4 dsm-1 an exchangeable sodium percentage (ESP) of less than 15 and the pH is usually less than 8.5 is called as ____?
A. Saline soils
B. Saline-sodic soils
C. Sodic soils
D. Neutral soils
Chitin and steroids are _______?
A. Lipids
B. Carbohydrates
C. Proteins
D. Waxes
Secondary air pollution is _________?
A. HNO3
B. CO3
C. CO2
D. All the above
Permanente wilting point of clayey soils is not less than _________?
A. 20%
B. 10%
C. 5%
D. 15%
Urea in manufactured form gases ________?
A. NH3
B. NH48CO2
C. NH3 & CH4
D. All the above
Acid soils of the world’s arable comprise up to ________?
A. 40%
B. 30%
C. 58%
D. 20%
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