Question
Explain oxidation and reduction reactions of carbonyl compounds.
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Match the compounds/elements given in Column I with uses given in Column II.
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Column I (Compound/element)
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Column II (Use)
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(i)
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Lanthanoid oxide
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(a)
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Production of iron alloy
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(ii)
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Lanthanoid
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(b)
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Television screen
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(iii)
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Misch metal
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(c)
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Petroleum cracking
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(iv)
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Magnesium based alloy is constituent of
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(d)
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Lanthanoid metal + iron
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(v)
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Mixed oxides of lanthanoids are employed
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(e)
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Bullets
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(f)
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In X-ray screen
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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?
Comment on the statement that elements of the first transition series possess many properties different from those of heavier transition elements.
- How do you prepare:
- $K_2MnO_4$ from $MnO_2?$
- $Na_2Cr_2O_7$ form $Na_2CrO_4?$
- Account for the following:
- $Mn^{2+}$ is more stable than $Fe^{2+}$ towards oxidation to $+3$ state.
- The enthalpy of atomization is lowest for $Zn$ in $3d$ series of the transition elements.
- Actinoid elements show wide range of oxidation states.
Match the graph given in Column $I$ with the order of reaction given in Column $II.$ More than one item in Column I may link to the same item of Column $II.$
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Column I
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Column II
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| $(i)$ |
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| $(ii)$ |
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$(a)$ | $I^{st}$ order |
| $(iii)$ |
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$(b)$ |
Zero order
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| $(iv)$ |
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A solution containing 30 g of non-volatile solute exactly in 90 g of water has a vapour pressure of 2.8 kPa at 298 K. Further, 18 g of water is then added to the solution and the new vapour pressure becomes 2.9 kPa at 298 K. Calculate :
(i) molar mass of the solute
(ii) vapour pressure of water at 298 K
(i) molar mass of the solute
(ii) vapour pressure of water at 298 K
Explain the relationship between basicity and structure of amines.
Describe the differences in the properties of lanthanoids and actinoids.
The decomposition of $N_2O_5(g)$ is a first order reaction with a rate constant of $5 \times 10^{-4} s^{-1} \ at \ 45^\circ C$, i.e., $2N_2O_5(g) \rightarrow 4NO_2(g) + O_2(g)$. If initial concentration of $N_2O_5$ is $0.25M$, calculate its concentration after $2\ min$. Also, calculate half- life for decomposition of $N_2O_5(g).$
→Answer the following question: Write mechanism of the reaction of $HI$ with methoxymethane.
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