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Answer :- Francium
2. Which acid is known as oil of vitriol?
Answer :- Sulfuric acid
3. The element with atomic number 111?
Answer :- Roentgenium
4. The first artificial element is?
Answer :- Technetium
Answer :- Alkali metals
6. The hydrocarbons in a gaseous form?
Answer :- Natural gas
7. Chemically insulin is a?
Answer :- Peptide
8. Black twins is a name given to?
Answer :- Iron and Coal
9. Father of Indian Atomic Research?
Answer :- Dr.Homi Jahangir Bhaba
10. Soaps are obtained from oils and fats by?
Answer :- Saponification
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