List of practice Questions

From the rate expression for the following reactions, determine their order of reaction and the dimensions of the rate constants.

  1. 3NO(g) \(\to\) N2O (g) Rate = k[NO]2
  2. H2O2 (aq) + 3I−(aq) + 2H+ \(\to\) 2H2O(l) + I3-  Rate = k[H2O2][I−]
  3. CH3CHO(g) \(\to\) CH4(g) + CO(g)  Rate = k [CH3CHO]\(\frac 32\)
  4. C2H5Cl(g) \(\to\) C2H4(g) + HCl(g)  Rate = k [C2H5Cl]

An organic compound(A)(molecular formula\( C_8H_{16}O_2\))was hydrolysed with dilute sulphuric acid to give a carboxylic acid(B)and an alcohol(C).Oxidation of(C)with chromic acid produced (B).(C)on dehydration gives \(but-1-ene\).Write equations for the reactions involved.
 

Write structural formulas and names of four possible aldol condensation products from propanal and butanal.In each case,indicate which aldehyde acts as nucleophile and which as electrophile.
 

How will you convert ethanal into the following compounds?
(i) Butane-1, 3-diol
(ii) But-2-enal
(iii) But-2-enoic acid

Write down the IUPAC name for each of the following complexes and indicate the oxidation state, electronic configuration and coordination number. Also give stereochemistry and magnetic moment of the complex:
\((i) K[Cr(H_2O)_2(C_2O_4)_2].3H_2O\)
\((ii)[Co(NH_3)_5Cl]Cl_2\)
\((iii) CrCl_3(py)_3\)
\((iv) Cs[FeCl_4]\)
\((v)K_4[Mn(CN)_6]\)

Discuss the nature of bonding in the following coordination entities on the basis of valence bond theory: 
\((i) [Fe(CN)_6]^{4-} \)
\((ii) [FeF_6]^{3-}\)
\((iii) [Co(C_2O_4)_3]^{3-} \)
\((iv) [CoF_6]^{3-}\)
Let $X$, $Y$, $Z$ be subsets of $U$, where $n(U) = 35$, $n(X) = 15$, $n(Y) = 22$, $n(Z) = 14$ and $n(X \cap Y) = 11$, $n(Y \cap Z) = 8$, $n(X \cap Z) = 5$, $n(X \cap Y \cap Z) = 3$ then $n(X \cup Y \cup Z)'$ equals
The vapour pressure of water is 12.3 kPa at 300 K. Calculate vapour pressure of 1 molal solution of a non-volatile solute in it
Heptane and octane form an ideal solution. At 373 K, the vapour pressures of the two liquid components are 105.2 kPa and 46.8 kPa respectively. What will be the vapour pressure of a mixture of 26.0 g of heptane and 35 g of octane?
An aqueous solution of \(2\%\) non-volatile solute exerts a pressure of 1.004 bar at the normal boiling point of the solvent. What is the molar mass of the solute?

Draw structures of the following derivatives. 
(i)The 2,4-dinitrophenylhydrazone of benzaldehyde 
(ii)Cyclopropanone oxime 
(iii)Acetaldehydedimethylacetal 
(iv)The semicarbazone of cyclobutanone 
(v)The ethylene ketal of hexan-3-one 
(vi)The methyl hemiacetal of formaldehyde

Give equations of the following reactions:(i)Oxidation of propane-1-ol with alkaline KMnO4 solution.
(ii)Bromine in CS2 with phenol.
(iii)Dilute HNO3 with phenol.
(iv)Treating phenol with chloroform in the presence of aqueous NaOH

Explain how does the –OH group attached to a carbon of benzene ring activate it towards electrophilic substitution?

Write the important structural and functional differences between DNA and RNA.
What is the difference between a nucleoside and a nucleotide ?

Give two reactions that show the acidic nature of phenol. Compare the acidity of phenol with that of ethanol.
The acidic nature of phenol can be represented by the following two reactions:

What are nucleic acids ? Mention their two important functions.
The partial pressure of ethane over a solution containing \(6.56 × 10^{–3} g\) of ethane is 1 bar. If the solution contains \(5.00 × 10^{–2} g\) of ethane, then what shall be the partial pressure of the gas?

Write the IUPAC names of the following ketones and aldehydes. Wherever possible, give also common names. 
\((i) CH_3CO(CH_2)_4CH_3 \)
\((ii) CH_3CH_2CHBrCH_2CH(CH_3)CHO \)
\((iii) CH_3(CH_2)_5CHO \)
\((iv) Ph-CH=CH-CHO\)
\((v)\)
\((vi) PhCOPh\)

Define the following as related to proteins (i)Peptide linkage (ii)Primary structure (iii)Denaturation.

You are given benzene,conc.H2SO4 and NaOH.Write the equations for the preparation of phenol using these reagents.

What are the common types of secondary structure of proteins ?
State Henry’s law and mention some important applications?
Write the mechanism of hydration of ethene to yield ethanol
Why do gases always tend to be less soluble in liquids as the temperature is raised?