Black lung disease occurs in people working in
1). Electroplating industry
2). Organic solvents industry
3). Paint manufacturing industry
4). Coalmines
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2. When there are two electrons in the same orbital, they have:
4. Question 1.1:Define the term ‘amorphous’. Give a few examples of amorphous solids.
5. Warming ammonium chloride with sodium hydrochloride in a test tube is an example of
6. Which one of the following is most acidic?
7. Question 16.5:Define the term chemotherapy.
8. The residue left after extracting juice from sugar beet and sugarcane is called
9. The common refrigerant in domestic refrigerator is
10. The polymerisation of which of the following is used in manufacturing of polythene in industry ?