Question
Explain the nitration reaction of benzene.
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Naina was preparing a compound in the laboratory. She added compound $‘A \ ’$ to $(CaOH)_2$ solution. As a result of this, a compound $‘B \ ’$ was obtained which had a pungent smell. On adding Nessler’s reagent to the compound $‘B \ ’,$ a brown precipitate of compound $‘C \ ’$ was obtained.
Write the chemical reactions involved and identify $‘A \ ’, ‘B \ ’$ and $‘C \ ’.$
→Write the chemical reactions involved and identify $‘A \ ’, ‘B \ ’$ and $‘C \ ’.$
Nitrogen does not form $NCl5$ or $NF5$ but phosphorus can. Explain.
→Complete the following reactions by mentioning the reagent/reaction conditions under which these reactions are carried out.
What are the limitations of valence bond theory?
Compound $“X”$ having the following structure is used as synthetic antioxidant to increase the shelf life of packed foods.
$i.$ What is the molecular formula of compound $“X”$?
$ii.$ Identify the structural unit responsible for antioxidant activity of $“X”.$
$iii.$ Give one example of a compound with structure, similar to compound $“X”,$ which is commonly used as synthetic antioxidant.
$iv.$ Give the $\text{IUPAC}$ name of compound $“X”.$
→$i.$ What is the molecular formula of compound $“X”$?
$ii.$ Identify the structural unit responsible for antioxidant activity of $“X”.$
$iii.$ Give one example of a compound with structure, similar to compound $“X”,$ which is commonly used as synthetic antioxidant.
$iv.$ Give the $\text{IUPAC}$ name of compound $“X”.$
Chalcopyrite $(CuFeS_2)$ is a common ore of copper. Since it has low concentration of copper, the ore is first concentrated through froth floatation process. The concentrated ore is then heated strongly with silicon dioxide $($silica$)$ and oxygen in a furnace. The product obtained, copper$(I)$ sulphide, is further converted to copper $(99.5\%$ pure$)$ with a final blast of air $(O_2)$ during which sulphur dioxide is released as a by$-$product.
$i.$ Write a balanced reaction for the extraction of copper from copper$(I)$ sulphide.
$ii.$ Which species undergoes an increase in the oxidation state?
$iii.$ Which species accepts electrons?
→$i.$ Write a balanced reaction for the extraction of copper from copper$(I)$ sulphide.
$ii.$ Which species undergoes an increase in the oxidation state?
$iii.$ Which species accepts electrons?
Complete the following table.Plant
| Medicinal property | Active ingredient | |
| Cinnamon | Antimicrobial for cold | ———— |
| ———— | ———— | Eugenol |
| Citrus fruits | Antioxidant | ———— |
| Wintergreen | ———— | ———— |
| Indian gooseberry (amla) | Antidiabetic, antimicrobial, antioxidant | Vitamin C, Gallic acid |
How does dihydrogen react with various organic compounds to give useful, commercially important products?
Write a short note on magnetic orbital quantum number $(m_l).$
→Draw orbital diagrams of
a. Fluorine molecule
b. Hydrogen fluoride molecule
a. Fluorine molecule
b. Hydrogen fluoride molecule