Question
Write the structure of A, B, C, D and E in the following reactions:
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Give the oxidation state, d-orbital occupation and coordination number of the central metal ion in the following complexes:
$i. K_3\left[ Co \left( C _2 O _4\right)_3\right]$
$ii.$ cis- $\left[ Cr (e n)_2 Cl _2\right] Cl$
$iii. \left( NH _4\right)_2\left[ CoF _4\right]$
$iv. \left[ Mn \left( H _2 O \right)_6\right] SO _4$
→$i. K_3\left[ Co \left( C _2 O _4\right)_3\right]$
$ii.$ cis- $\left[ Cr (e n)_2 Cl _2\right] Cl$
$iii. \left( NH _4\right)_2\left[ CoF _4\right]$
$iv. \left[ Mn \left( H _2 O \right)_6\right] SO _4$
Sodium has a bcc structure with nearest neighbour distance 365.9pm. Calculate its density (Atomic mass of sodium = 23).
Which forces are responsible for the stability of $\alpha-\text{helix}?$ Why is it named as $3.6_{13}$ helix?
→The time required for $10 \%$ completion of a first order reaction at $298 K$ is equal to that required for its $25 \%$ completion at $308 K $. If the value of A is $4 \times 10^{10} S^{-1}$. Calculate k at $318 K $ and $E _{ a }$.
→How will you carry out the following conversions?
How are different aromatic compounds synthesized by benzene diazonium chloride? Explain with examples.
Explain the following phenomena with the help of Henry’s law.
- Painful condition known as bends.
- Feeling of weakness and discomfort in breathing at high altitude.
- With reference to structural variability and chemical reactivity, write the differences between lanthanoids and actinoids.
- Name a member of the lanthanoid series which is well known to exhibit $+4$ oxidation state.
- Complete the following equation:
- Out of $Mn^{3+}$ and $Cr^{3+}$, which is more paramagnetic and why?
Match the items of Column I with items of Column II and assign the correct code:
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Column I
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Column II
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(A)
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Cyanide process |
(1)
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Ultrapure Ge |
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(B)
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Froth Floatation process |
(2)
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Dressing of ZnS |
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(C)
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Electolytic reduction |
(3)
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Extraction of Al |
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(D)
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Zone refinning |
(4)
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Extraction of Au |
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(5)
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Purification of Ni |
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A (4) B (2) C (3) D (1)
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A (2) B (3) C (1) D (5)
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A (1) B (2) C (3) D (4)
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A (3) B (4) C (5) D (1)
Draw all the isomers of: (geometrical and optical)
i. $\left[ CoCl _2( en )_2\right]^{+}$
ii. $\left[ Co \left( NH _3\right) Cl ( en )^2\right]^{2+}$
iii. $\left[ Co \left( NH _3\right)_2 Cl _2( en )\right]^{+}$
→i. $\left[ CoCl _2( en )_2\right]^{+}$
ii. $\left[ Co \left( NH _3\right) Cl ( en )^2\right]^{2+}$
iii. $\left[ Co \left( NH _3\right)_2 Cl _2( en )\right]^{+}$