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Account for the following:
  1. Electrophilic substitution in case of aromatic amines takes place more readily than benzene.
  2. CH3CONH2 is a weaker base than CH3CH2NH2.
  3. Nitro compounds have higher boiling points than hydrocarbons having almost same molecular mass.
(a) $Cu ^{+} X ^{-}$is unstable, why?
(b) Explain the structure of $Mn _2 O _7$ and $MnO _4^{-}$.
How does acetone reacts with HCN and NaHSO3?
For the first order thermal decomposition reaction, the following data were obtained:
$\text{C}_{2}\text{H}_{5}\text{Cl}\text{(g)}\rightarrow \text{C}_{2}\text{H}_{4}\text{(g)} + \text{HCl}\text{(g)} $
Time/sec Total pressure/atm
0 0.30
300 0.50
Calculate the rate constant
(Given: log 2 = 0.301, log 3=0.4771, log 4 =0.6021)
Write short note on alloys.
What happens when bromine reacts with $\text{CH}_3-\text{C}\equiv\text{CH}?$ How would you justify this reaction?
Give reasons :
(i) Carbon-oxygen bond length in phenol is slightly less than that of methanol.
(ii) The $C - O - C$ bond angle present in ether is greater than the tetrahedral angle.
(iii) The boiling point of isomeric alcohols decreases with increase in branching.
From the following molar conductivities at infinite dilution, calculate $\Lambda^0_{\text{m}}$ for NH4OH.
$\Lambda^0_{\text{m}}\text{ for }\text{Ba(OH)}_2=457.6\Omega^{-1}\text{cm}^2\text{mol}^{-1}$
$\Lambda^0_{\text{m}}\text{ for }\text{BaCl}_2=240.\Omega^{-1}\text{cm}^2\text{mol}^{-1}$
$\Lambda^{0}_{\text{m}}\text{ for }\text{NH}_4\text{Cl}=129.8\Omega^{-1}\text{cm}^2\text{mol}^{-1}$
Following compounds are given to you:
2-Bromopentane, 2-Bromo-2-methylbutane, 1-Bromopentane
  1. Write the compound which is most reactive towards SN2 reaction.
  2. Write the compound which is optically active.
  3. Write the compound which is most reactive towards $\beta$-elimination reaction.
Give the function of steroid hormones.