What is the oxidation number of the element in its free state?
6. Write the general electronic configuration of first group elements.
7. Diamond is covalent, yet it has high melting point. Why?
8. Write the dimeric structure of AIC13.
9. Give an example for non-benzenoid compound.
10. Write a chemical reaction to show acidic nature of acetylene.
PART- B
II. ANSWER ANY FIVE OF THE FOLLOWING. EACH QUESTION CARRIES 2 MA
11. Convert 37°C to °F.
12. Under what conditions of temperature and pressure real gases tend to behave ide
13. What is dipole moment? What is its SI unit?
(14.)Write any two diagonal relationships between Beryllium and Aluminium.
15. Give the composition of (a) Water gas (b) Producer gas.
16. How is chloromethane converted into ethane?
17. Illustrate Markovnikov's rule with an example.
18. Explain decarboxylation of sodium benzoate with chemical equation.
PART-C
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Explanation:
What is the oxidation number of the element in its free state?
The oxidation state of a free element (uncombined element) is zero. For a simple (monoatomic) ion, the oxidation state is equal to the net charge on the ion. For example, Cl– has an oxidation state of -1. When present in most compounds, hydrogen has an oxidation state of +1 and oxygen an oxidation state of −2.
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Answer:
The oxidation state of a free element (uncombined element) is zero. For a simple (monoatomic) ion, the oxidation state is equal to the net charge on the ion. For example, Cl– has an oxidation state of -1. When present in most compounds, hydrogen has an oxidation state of +1 and oxygen an oxidation state of −2.
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