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Write a detailed note on enzymes.
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- Write steps involved in the preparation of $(i) Na_2CrO_4$ from chromite ore and $(ii) K_2MnO_4$ from pyrolusite ore.
Discuss the nature of bonding in the following coordination entities on the basis of valence bond theory :
(i) $\left[ Fe ( CN )_6\right]^{4-}$
(ii) $\left[ FeF _6\right]^{3-}$
(iii) $\left[ Co \left( C _2 O _4\right)_3\right]^{3-}$
(iv) $\left[ CoF _6\right]^{3-}$
→(i) $\left[ Fe ( CN )_6\right]^{4-}$
(ii) $\left[ FeF _6\right]^{3-}$
(iii) $\left[ Co \left( C _2 O _4\right)_3\right]^{3-}$
(iv) $\left[ CoF _6\right]^{3-}$
Explain the following terms:
(i) Coagulation
(ii) Electrophoresis
(iii) Tyndall Effect
(iv) Hardy Schulze's Rule
(i) Coagulation
(ii) Electrophoresis
(iii) Tyndall Effect
(iv) Hardy Schulze's Rule
Answer the following questions:Account for the following$:$
→- Methylamine in water reacts with ferric chloride to precipitate hydrated ferric oxide.
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Answer the following questions$:$
Write balanced equations to represent what happens when.
→Write balanced equations to represent what happens when.
- $Cu^{2+}$ is treated with $KI.$
- Acidified potassium dichromate solution is reacted with iron $(II)$ solution. $($ionic equation$).$
Identify $\text\{A, B, C, D, E, R\}$ and $R^1$ in the following:
→Explain the energy distribution curve of gaseous molecules and also discuss the effect of temperature on it.
Write the Nernst equation and emf of the following cells at 298 K :
(i) $Mg ( s )\left| Mg ^{2+}(0.001 M )|| Cu ^{2+}(0.0001 M )\right| Cu ( s )$
(ii) $Fe ( s )\left| Fe ^{2+}(0.001 M )|| H ^{+}(1 M )\right| H _2(g)(1 bar ) \mid Pt ( s )$
(iii) $Sn ( s )\left| Sn ^{2+}(0.050 M )||H ^{+}(0.020 M )\right| H _2(g)(1 bar ) \mid Pt ( s )$
(iv) $\operatorname{Pt}( s )|\overline{\operatorname{B}}r(0.010 M )|Br _{2(l)}||H ^{+}(0.030 M )|$ $H _2(g)(1 bar ) \mid Pt ( s )$.
→(i) $Mg ( s )\left| Mg ^{2+}(0.001 M )|| Cu ^{2+}(0.0001 M )\right| Cu ( s )$
(ii) $Fe ( s )\left| Fe ^{2+}(0.001 M )|| H ^{+}(1 M )\right| H _2(g)(1 bar ) \mid Pt ( s )$
(iii) $Sn ( s )\left| Sn ^{2+}(0.050 M )||H ^{+}(0.020 M )\right| H _2(g)(1 bar ) \mid Pt ( s )$
(iv) $\operatorname{Pt}( s )|\overline{\operatorname{B}}r(0.010 M )|Br _{2(l)}||H ^{+}(0.030 M )|$ $H _2(g)(1 bar ) \mid Pt ( s )$.
$(a).$ Give reasons for the following:
$(i)$ The reaction of ethanol with acetyl chloride is carried out in the presence of pyridine. Cresols are less acidic than phenol. Williamson's process is used for the preparation of ethers from alkyl halide. Identify the alkyl bromide and sodium alkoxide used for the preparation of $2-$ Ethoxy$-3-$methylpentane
$(c).$ Convert:
$(i)$ Toluene to $3-$nitrobenzoic acid.
$(ii)$ Benzene to $m-$nitroacetophenone.
→$(i)$ The reaction of ethanol with acetyl chloride is carried out in the presence of pyridine. Cresols are less acidic than phenol. Williamson's process is used for the preparation of ethers from alkyl halide. Identify the alkyl bromide and sodium alkoxide used for the preparation of $2-$ Ethoxy$-3-$methylpentane
$(c).$ Convert:
$(i)$ Toluene to $3-$nitrobenzoic acid.
$(ii)$ Benzene to $m-$nitroacetophenone.
Write the structure of A, B, C, D and E in the following reactions:
