JEE Main entrance exam Question Bank Solutions

Among the following, the aromatic compounds are:

(A)
(B)
(C)
(D)

Choose the correct answer from the following options:

The major products formed in the following reaction sequence A and B are:

An organic compound neither reacts with neutral ferric chloride solution nor with Fehling solution. It however, reacts with Grignard reagent and gives positive iodoform test. The compound is:

The correct set of products obtained in the following reactions:

1. \[\ce{RCN ->[reduction]}\]
2. \[\ce{RCN ->[(i) CH3MgBr][(ii) H2O]}\]
3. \[\ce{RNC ->[hydrolysis]}\]
4. \[\ce{RNH2 ->[HNO2]}\]

Bonding in which of the following diatomic molecule(s) become(s) stronger, on the basis of MO Theory, by removal of an electron?

(A) NO

(B) N₂

(C) O₂

(D) C₂

(E) B₂

Choose the most appropriate answer from the options given below:

The volume of gas A is twice than that of gas B. The compressibility factor of gas A is thrice than that of gas B at the same temperature. The pressures of the gases for an equal number of moles are ______.

Choose the reaction which is not possible: 

In Tollen's test for aldehyde, the overall number of electrons(s) transferred to the Tollen's reagent formula \[\ce{[Ag(NH3)2]+}\] per aldehyde group to form silver mirror is ______. (Round off to the nearest integer)

The oxoacid of phosphorus that is easily obtained from a reaction of alkali and white phosphorus and has two P-H bonds, is ______.

Match List-I with List-II:

Choose the correct answer from the options given below:

\[\ce{CH3-CH2-CHO ->[dil][alkali] Product}\]

The product in the above reaction is:

Benzene reacts with benzoyl chloride to form ______.

Phenol associates in benzene to a certain extent to form a dimer. A solution containing 20 × 10^-3 kg of phenol in 1.0 kg of benzene has its freezing point depressed by 0.69 K The fraction of phenol that has dimerised is ______. (K_f for benzene = 5.12 K kg mol^-1)

The major product of the following reaction is:

In van der Waals equation of state of the gas law, the constant 'b' is a measure of ______.

In Friedel-Crafts alkylation of aniline, one gets ______.

Excess of isobutane on reactions with Br₂ in presence of light at 125°C gives which one of the following, as the major product?

These are physical properties of an elements.

1. Sublimation enthalpy
2. Ionisation enthalpy
3. Hydration enthalpy
4. Electron gain enthalpy

The total number of above properties that affect the reduction potential is ______. (Integer answer)

hydrocarbon (X) major product X is:

\[\begin{array}{cc}
\ce{D}\phantom{........................}\\
|\phantom{.........................}\\
\ce{2D - C = O + OH^- ->[Cannizzaro] X and Y}
\end{array}\]

(Y is alcohol, D is deuterium)

X and Y will have the structure: