Manganese ions on reaction with peroxydisulphate ions form :

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:

The standard reduction potential for \(\text{Sn}^{4+}/\text{Sn}^{2+}\) is \(+0.15\text{ V}\) and for \(\text{Cr}^{3+}/\text{Cr}\) is \(-0.74\text{ V}\). These two half-cells, coupled in their standard states, are connected to make a cell. The galvanic cell can be correctly represented by :

Arrange the following sets of compounds in order of their increasing boiling points.
A. Pentan-1-ol
B. Butan-1-ol
C. Butan-2-ol
D. Ethanol
E. Propan-1-ol
Choose the correct answer from the options given below :

Read the passage carefully and answer the Questions:
Amines are classified as primary \(\left(1^{\circ}\right)\), secondary \(\left(2^{\circ}\right)\) and tertiary \(\left(3^{\circ}\right)\) depending upon the number of hydrogen atoms replaced by alkyl or aryl groups in ammonia molecules. Aliphatic amines are a stronger bases due to \(+I\) effect of an alkyl groups. Intermolecular hydrogen bonding in primary and secondary amines affects the boiling points of amines. The intermolecular association is more in primary amines than in secondary amines as there are more number of hydrogen atoms available for hydrogen bond formation. Nitro compounds are reduced to amines by passing hydrogen gas in the presence of finely divided nickel, palladium or platinum and also by reduction with metals in an acidic medium. Gabriel synthesis is used for the preparation of primary amines. Primary amines react with nitrous acid to give unstable diazonium-salts which can be used to synthesize a variety of compounds.

The reaction is an example of:

The correct cell representation for the following reaction is
\(M g ( s )+ 2 \mathrm { Ag } ^ { + } (0.0001 M ) \rightarrow M g ^{ 2 + }(0.130 M )+ 2 A g (s)\)

\(\Lambda_m^{\circ}\) for \(\mathrm{NaCl}, \mathrm{HCl}\), and \(\mathrm{CH}_3 \mathrm{COONa}\) are \(126.4,425.9\), and \(91.0 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}\), respectively. Calculate \(\Lambda_m^{\circ}\) for \(\mathrm{CH}_3 \mathrm{COOH}\).

Which of the following is the best reducing agent to convert RCOOH into \(RCH _2 OH\) ?

The conductivity of an electrolytic solution does not depend on

Identify the correct relation between the molar mass of solute and Ebullioscopic constant.

Arrange the following in increasing order of their \(pK _a\) values.
(A) o-nitrophenol
(B) m-nitrophenol
(C) Phenol
(D) Ethanol
Choose the correct answer from the options given below:

DNA recombinant technology involves the use of restriction endonucleases. After having cloned the gene of interest and having optimised the conditions to induce the expression of the target protein, one has to consider producing it on a large scale. The cells harbouring cloned genes of interest may be grown on a small scale in the laboratory. In order to link the alien DNA, the vector needs to have very few, preferably single, recognition sites for the commonly used restriction enzymes. Presence of more than one recognition sites within the vector will generate several fragments, which will complicate the gene cloning. In Biolistics or gene gun method cells are bombarded with high velocity micro particles of gold or tungsten coated with DNA. The ligation of alien DNA is carried out at a restriction site present in one of the two antibiotic resistance genes. For example, you can ligate a foreign DNA at the BamH I site of tetracycline resistance gene in the vector pBR322. Since the DNA is enclosed within the membranes, we have to break the cell open to release DNA along with other macromolecules such as RNA, proteins, polysaccharides and also lipids. The RNA can be removed by treatment with ribonuclease whereas proteins can be removed by treatment with protease. Other molecules can be removed by appropriate treatments and purified DNA ultimately precipitates out after the addition of chilled ethanol.
If any protein encoding gene is expressed in a heterologous host, it is called as

The magnetic field in a plane electromagnetic wave is given by \( B = 3 \times 10^{-7} \sin(1.5z + 5 \times 10^{8}t) \text{ T} \), where \( z \) is in meter and \( t \) is in second. The wavelength of the wave is: (Take \( \pi = 3 \))