JEE Main entrance exam Question Bank Solutions for Chemistry (JEE Main)

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:

In the Cannizzaro reaction given below:

\[\ce{2Ph-CHO ->[OH^-] Ph-CH2OH + PhC\overset{-}{O}_2}\]

the slowest step is:

The first and second dissociation constants of an acid H₂A are 1.0 × 10⁻⁵ and 5.0 × 10⁻¹⁰ respectively. The overall dissociation constant of the acid will be ______.

Benzene on nitration gives nitrobenzene in presence of HNO₃ and H₂SO₄ mixture, where ______.

Which of the following would not give 2-phenylbutane as the major product in a Friedel-Crafts alkylation reaction?

Complete combustion of 750 g of an organic compound provides 420 g of CO₂ and 210 g of H₂O. The percentage composition of carbon and hydrogen in organic compound is 15.3 and ______ respectively. (Round off to the Nearest Integer).