Answer the question on the basis of passage given below :
Strong oxidising agents oxidise toluene and its derivatives to benzoic acid. However, it is possible to stop the oxidation at the aldehyde stage with suitable reagents that convert the methyl group to an intermediate that is difficult to oxidise further.
Conversions that can be done by same reagent are:
(A) Benzaldehyde to 2-nitrobenzaldehyde
(B) Propan-1-ol to propanal
(C) Pent-3-en-2-ol to pent-3en-2-one
(D) Butanal to Butan-1-ol
(E) Methanal to Ethanol
Choose the correct answer from the options given below :

Answer the question on the basis of passage given below :
There are three kinds of amines which are primary, secondary and tertiary amines. These amines may have alkyl group or aryl group or both alkyl and aryl groups. These amines can be distinguished from one another by various chemical tests.
An amine A on treatment with \(\text{NaNO}_2\) and \(\text{HCl}\) at 273-277 K, followed by treatment with ethyl alcohol, gives a compound B with empirical formula CH and molecular mass 78.
A is :

When \(Br_2\) is treated with aqueous solution of \(NaF, NaCl, NaI\) separately:

Toluene reacts with a halogen in the presence of FeCl 3, giving a mixture of ortho and para halo compounds. This type of reaction is called:

The formation of micelle takes place only :
(A) quad above a particular temperature called kraft temperature
(B) quad above a particular concentration called critical micelle concentration
(C) quad when catalyst is added
Choose the correct answer from the options given below :

The major product formed when acetanilide undergoes bromination in presence of acetic acid is:

Which of the following statements about hormones is incorrect?

The pressure of \(\text{H}_2\) required to make the potential of \(\text{H}_2\) electrode zero in pure water at 298 K is
(Given \(\text{E}_{cell} = 0.0 \text{ V}\))

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.
Identify the amine possessing least basic strength

\( 10^{18} \) electrons pass from point A to point B in 0.1 s in a conductor. The value of the current is

Arrange the following compounds in the order of their increasing boiling point :
Pentan-1-ol, n-butane, pentanal, ethoxy ethane

An unbiased die is rolled. If the random variable \(X\) is defined as,
\(X=\left\{\begin{array}{ll}1 & \text { if the outcome is a number less than or equal to } 3 \\0 & \text { if the outcome is a number greater than } 3\end{array}\right.\)
Then the probability distribution of \(X\) is :

What are seen as "beads on string" structure when viewed under an electron microscope ?