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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.
A solid substance with a mass of 200g is at its melting temperature in a calorimeter. While the substance changes from a solid to a liquid at the same temperature, the 400-gram mas
Vitamins - Biomolecules Additionally to air, water, proteins, carbohydrates, fats and mineral salts, specific organic substances needed for regulating some of the body procedur
The maximum number of electrons accommodated in 5f orbitals are: (1) 5 (2) 10 (3) 14 (4) 18 Ans: 14
photochemical combination of hydrogen molecule and iodine molecule
Q.Briefly describe about Nitrogen? Ans. Nitrogen is a gas that makes up approximately 79% of the atmosphere. It exists in the form of the diatomic molecule N 2 . In this f
what will be theory of phthalic acid of crystallization?
Which type of bond is formed between similar atoms: (1) Ionic (2) Covalent (3) Coordinate (4) Metallic Ans: Covalent
merits& demerits of free radical mechanism
oxidation state of p-block elements?
100 mol/hr pentane flows through an adiabatic heat exchanger where it is heated isobarically (at 2.5 bar) from 50°C to 250°C. The pentane is heated by contacting pipes filled with
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