Question
Explain the various uses of lanthanoids.
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Answer
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Answer the following question:
$g$ of benzoic acid $(C_6H_5COOH)$ dissolved in $25g$ of benzene shows a depression in freezing point equal to $1.62K.$ Molal depression constant for benzene is $4.9K\ kg\ mol^{-1}$. What is the percentage association of acid if it forms dimer in solution?
→$g$ of benzoic acid $(C_6H_5COOH)$ dissolved in $25g$ of benzene shows a depression in freezing point equal to $1.62K.$ Molal depression constant for benzene is $4.9K\ kg\ mol^{-1}$. What is the percentage association of acid if it forms dimer in solution?
Consider the reaction $\text{R}\xrightarrow{\ \ \text{k}\ \ } \text{P}.$ The change in concentration of $R$ with time is shown in the following plot:
→- Predict the order of the reaction.
- Derive the expression for the time required for the completion of the reaction.
- What does the slope of the above line indicate?
Write the $" \text{IUPAC}"$ names of the following coordination compounds:
$a. \left[ Pt \left( NH _3\right)_2 Cl \left( NO _2\right]\right.$
$b. K _3\left[ Cr \left( C _2 O _4\right)_3\right]$
$c. \left[ CoCl _2( en )_2\right] Cl$
$d. \left[ Co \left( NH _3\right)_5\left( CO _3\right)\right] Cl$
$e. Hg \left[ Co ( SCN )_4\right]$
→$a. \left[ Pt \left( NH _3\right)_2 Cl \left( NO _2\right]\right.$
$b. K _3\left[ Cr \left( C _2 O _4\right)_3\right]$
$c. \left[ CoCl _2( en )_2\right] Cl$
$d. \left[ Co \left( NH _3\right)_5\left( CO _3\right)\right] Cl$
$e. Hg \left[ Co ( SCN )_4\right]$
How will you carry out the following conversions?
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A translucent white waxy solid (A) on heating in an inert atmosphere is converted to its allotropic form (B). Allotrope (A) on reaction with very dilute aqueous KOH liberates a highly poisonous gas (C) having rotten fish smell. With excess of chlorine it forms (D) which hydrolyses to compound (E). Identify compounds (A) to (E).
