Arrange the following phenols in the decreasing order of their acidic strength:
(A) Phenol
(B) o-Cresol
(C) o-Nitrophenol
(D) 2,4-Dinitrophenol
Choose the correct answer from the options given below:

Arrange the following acids in increasing order of their acidic strengths: \(HCOOH , FCH _2 COOH , NO _2 CH _2 COOH , ClCH _2 COOH\)

Arrange the metal ions of the following compounds in increasing order of oxidation number :
(A) \(\text{TiCl}_3\)
(B) \(\text{CrF}_6\)
(C) \(\text{ZnO}\)
(D) \(\text{Mn}_2\text{O}_7\)
Choose the correct answer from the options given below :

Predict the percentage of nitration products when aniline is subjected to nitration with conc. \(\mathrm{HNO}_3 /\) conc. \(\mathrm{H}_2 \mathrm{SO}_4\).

Answer the question on the basis of passage given below :
Living systems are made up of various complex bio-molecules like carbohydrates, proteins, nucleic acids, lipids etc. Proteins and carbohydrates are essential constituents of our food. Carbohydrates are primarily produced by plants and form a very large group of naturally occurring organic compounds. Some common examples are cane sugar, glucose, starch etc.
Which of the following is a structural component of starch?

Which of the following classes of compounds on hydrolysis yields carboxylic acids?
(A) RCN
(B) \(RCONH_{2}\)
(C) RCOCl
(D) RCOOR'
Choose the \textbf\{correct answer\} from the options given below:

Primary Alkyl halide \(\text{C}_4\text{H}_9\text{Br}\) (X) reacts with alcoholic \(\text{KOH}\) to give the compound (Y). Compound (Y) is reacted with \(\text{HBr}\)
to give (Z) which is an isomer of (X). When (X) is reacted with \(\text{Na/dry ether}\), it gives a compound (T), \(\text{C}_8\text{H}_{18}\), which is
different from the compound formed when n-butyl bromide is reacted with \(\text{Na/dry ether}\). The correct IUPAC name of (T) is:

\(\Delta G = \Delta H – T\Delta S\)
When \(\Delta H = -ve\) and \(\Delta S = -ve\), then the value of \(\Delta G\) will :

Match List-l with List-ll

List-l	List-II
(A) Coupling reaction	(I) Primary amines
(B) Hofmann's degradation	(II) Aromatic amines
(C) Isocyanide test	(III) Phenols and aromatic amines
(D) Diazonium salts	(IV) Amide to amine

Choose the correct answer from the options given below:

Read the following passage carefully and answer the given questions. During anaerobic sludge digestion, bacteria produce a mixture of gases such as methane, hydrogen sulphide and carbon dioxide. These gases form biogas and can be used as source of energy as it is inflammable. The bioactive molecule, cyclosporin A, that is used as an immunosuppressive agent in organ-transplant patients, is produced by the fungus Trichoderma polysporum. You must have noticed that bottled fruit juices bought from the market are clearer as compared to those made at home. This is because the bottled juices are clarified by the use of pectinases and proteases. Statins produced by the yeast Monascus purpureus have been commercialised as blood-cholesterol lowering agents. It acts by competitively inhibiting the enzyme responsible for synthesis of cholesterol. The BOD test measures the rate of uptake of oxygen by microorganisms in a sample of water and thus, indirectly, BOD is a measure of the organic matter present in the water.
Cyclosporin A, that is used as an immunosuppressive agent in organ-transplant patients, is produced by -

A metal foil of thickness (3/4)d is introduced between two plates of a capacitor of capacitance C. The distance between the plates of the capacitor is d. The new capacitance of the capacitor will be

The molecule with largest \(C - X\) bond length is

Which one of the following statements is incorrect: