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Question 1:
(i) What are the main physical properties of hydrogen sulphide?
(ii) Which occupational group of workers is often exposed to hydrogen sulphide?
(iii) Outline two acute and four chronic health effects of human exposure to hydrogen sulphide.
(iv) Suggest four engineering and four administrative controls to hydrogen sulphide at workplaces.
Explain briefly the importance of material safety data sheet.
Q. What is law of definite proportions? A given compound is forever composed of the same elements in the same proportion by mass. This fact is recognized as the law of definit
Each element has a unique number of protons. This unique number is known as the element's atomic number . All atoms of a given element have the same atomic number. For example:
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ether is more volatile than an alcohol both having same molecular formula. why?
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the simplest forms of physical quantities
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