Question
- $\text{CH}_{3}-\text{CH}_{2}-\text{ Br}\xrightarrow{\text{AgCN } } ?$
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Answer
- $CH_3CH_2NC$.
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How will you bring about the following conversions?
Methyl bromide to acetone.
Methyl bromide to acetone.
Write IUPAC names of the following coordination compounds:
i. $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right] \mathrm{Cl}_3$
ii. $\left[\mathrm{Co}\left(\mathrm{NH}_3\right) 5 \mathrm{Cl}^2 \mathrm{Cl}_2\right.$
iii. $\mathrm{K}_3\left[\mathrm{Fe}(\mathrm{CN})_6\right]$
→i. $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right] \mathrm{Cl}_3$
ii. $\left[\mathrm{Co}\left(\mathrm{NH}_3\right) 5 \mathrm{Cl}^2 \mathrm{Cl}_2\right.$
iii. $\mathrm{K}_3\left[\mathrm{Fe}(\mathrm{CN})_6\right]$
For the complex $[Fe(en)_2Cl_2]Cl,$ (en = ethylene diamine), identify.
→- The oxidation number of iron,
- The hybrid orbitals and the shape of the complex,
- The magnetic behaviour of the complex,
- The number of geometrical isomers,
- Whether there is an optical isomer also, And
- Name of the complex. (At. no. of Fe = 26).
State Raoult’s law for a solution containing volatile components. How does Raoult’s law become a special case of Henry’s law?
A solution of $KMnO_4$ on reduction yields either a colourless solution or a brown precipitate or a green solution depending on pH of the solution. What different stages of the reduction do these represent and how are they carried out?
→In which of the following pairs will more electric current flow and why?
(a) KCl solution $25^{\circ} C$ and KCl solution at $50^{\circ} C$.
(b) $0.2 \quad M \quad CH _3 COOH$ solution and 2 M $CH _3 COOH$ solution.
(c) $NH _4 OH$ solution at $25^{\circ} C$ and at wire at $50^{\circ} C$.
(d) Al wire at $25^{\circ} C$ and Al wire at $50^{\circ} C$.
→(a) KCl solution $25^{\circ} C$ and KCl solution at $50^{\circ} C$.
(b) $0.2 \quad M \quad CH _3 COOH$ solution and 2 M $CH _3 COOH$ solution.
(c) $NH _4 OH$ solution at $25^{\circ} C$ and at wire at $50^{\circ} C$.
(d) Al wire at $25^{\circ} C$ and Al wire at $50^{\circ} C$.
i. What type of isomerism is shown by the complex $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]\left[\mathrm{Cr}(\mathrm{CN})_6\right]$ ?
ii. Why a solution of $\left[\mathrm{Ni}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$ is green while a solution of $\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$ is colourless? (At. no. of $\mathrm{Ni}=28$ )
iii. Write the IUPAC name of the following complex: $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5\left(\mathrm{CO}_3\right)\right] \mathrm{Cl}$.
→ii. Why a solution of $\left[\mathrm{Ni}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$ is green while a solution of $\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$ is colourless? (At. no. of $\mathrm{Ni}=28$ )
iii. Write the IUPAC name of the following complex: $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5\left(\mathrm{CO}_3\right)\right] \mathrm{Cl}$.
Calculate the temperature at which a solution containing $54$ g of glucose, $C_6H_{12}O_6,$ in $250$ g of water will freeze. $[K_f$ for water $= 1.86\ K\ kg\ mol^{–1}].$
→Ortho and para nitrophenols are more acidic than phenol. Draw the resonance structures of the corresponding phenoxide ions.
Write down the IUPAC name for the following complex and indicate the oxidation state, electronic configuration and coordination number. Also give stereochemistry and magnetic moment of the complex:
$[Co(NH_3)_5Cl-]Cl_2$
→$[Co(NH_3)_5Cl-]Cl_2$