List of practice Questions

Write one structural difference between DNA and RNA.
What products would be formed when a nucleotide from DNA containing thymine is hydrolyzed ?
Write the name of basic building units of proteins and nucleic acids. How can you differentiate between Fibrous and Globular proteins on the basis of their structures ?
Write the products of the following reaction : \[ (CH_3)_3C-O-C_2H_5 \xrightarrow{HI} ? \]
Why are tertiary alcohols resistant to oxidation ?
Write the reaction involved in Kolbe's reaction.
Name the reagents used in the following reactions : (i) Oxidation of a primary alcohol to aldehyde (ii) Oxidation of a primary alcohol to carboxylic acid
Name two coordination compounds which are important in biological systems. (ii) What is meant by chelate effect ? Give an example. (iii) Why are low spin tetrahedral complexes rarely formed ?
Answer the following questions about the complexes \[ [NiCl_4]^{2-} \quad \text{and} \quad [Ni(CN)_4]^{2-} \] (i) Write the hybridization involved in each case. (ii) Which of them is the inner orbital complex and which one is the outer orbital complex ? (iii) Compare their magnetic behaviour. (Atomic Number of Ni = 28)
Why does a mercury cell deliver a constant voltage for its entire life?
Why is it necessary to use salt bridge in a galvanic cell?
Why are low spin tetrahedral complexes rarely formed?
\[ \text{What happens when an acidic solution of the green compound }(B)\text{ is allowed to stand for some time? Also write the equation involved. What is this type of reaction called?} \]
\[ \text{Why are }\alpha\text{-hydrogen atoms of aldehydes and ketones acidic in nature?} \]
\[ \text{Arrange the following compounds in increasing order of their reactivity towards }HCN: \]
\[ CH_3COCH_3,\quad CH_3CHO,\quad (CH_3)_3C-CO-CH_3 \]
Write the reaction involved in Etard reaction.
\[ \text{Write the product when cyclohexanecarbaldehyde reacts with }Zn(Hg)/conc.\;HCl. \]
Give reasons for the following:
Define Double Salt with one example.
What is meant by chelate effect? Give an example.
\[ \text{The conductivity of }0.001M\text{ solution of acetic acid is }3.905\times10^{-5}\;S\,cm^{-1}.\text{ Calculate its molar conductivity and degree of dissociation }(\alpha). \]
\[ \lambda^\circ_{CH_3COO^-}=40.9\;S\,cm^2mol^{-1} \]
\[ \lambda^\circ_{H^+}=349.6\;S\,cm^2mol^{-1} \]
Draw the structure of the semicarbazone of acetone.
\[ \text{A black-brown coloured solid }(A)\text{ when fused with }KOH\text{ in the presence of air, produces a dark green compound }(B)\text{ which on electrolytic oxidation in alkaline medium gives a dark purple coloured compound }(C).\text{ Identify }(A),(B)\text{ and }(C).\text{ Write the reactions involved.} \]
Name two coordination compounds which are important in biological systems.
Define Ambidentate Ligand with one example.