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Question:
(a) Explain the potential health risk which composting will pose to workers or to those located near a facility.
(b) A number of concerns have been shown in regard to risk assessment and waste management. Show fully the four main stages in the systematic approach to risk assessment.
(c) With regards to public health and environmental protection a properly designed and operated landfill should offer advantages in several areas. Describe briefly five advantages.
Q. Explain Ionization Energy? Ans. When an electron is removed from an atom, the atom has been ionized. Therefore, the energy required to remove an electron from an atom i
what is formox what does it do and is it good or bad for environment
Acidic character order of phenon , ortho nitro phinol, para nitro phenol#
the properties of s,p,d,f block elements?
homolytic fission
The maximum number of electrons present in an orbit l= 3 , is: (1) 6 (2) 8 (3) 10 (4) 14 Ans: 14
Use the VSEPR model to predict approximate molecular geometries and electron-domain for the following species. (a) XeF 2 , (b) NH3Cl + , (c) BrO2 -
The number of unpaired electrons in Fe 3+ (Z= 26) are: (1) 5 (2) 6 (3) 3 (4) 4 Ans: 5
4-nitrotolouene ---> LiAlH 4 converts it to 4-aminotoluene ----> Add HNO 2 and it forms -----> diazonium salt ------> add H 3 PO 2 to get Toluene -----> add Br 2 /CCl 4 - 2
Q. Describe Molarity and Molality and what is the basic diffrence between Molarity and Molality? The concentration of a solution is usually expressed as molarity (i.e., M). The
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