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

Stannous chloride solution when kept in the air turns milky due to the formation of ______.

The lathanide ion that would show colour is ______.

Which of the following compound is optically active?

Glucose with excess of phenyl hydrazine forms ______.

In an experiment O₃ undergo decomposition as \[\ce{O3 -> O2 + O}\] by the radiations of wavelength 310 Å. The total energy falling on the O₃ gas molecules is 2.4 × 10²⁶ eV and quantum yield of the reaction is 0.2.

The volume strength of the H₂O₂ solution which is obtained from reaction of 1 l H₂O and nascent oxygen [O] obtained from the above reactions is (Assuming no change in volume of H₂O)

\[\ce{H2O + O -> H2O2}\]

[Given: N_a (Avogadro's No.) = 6 × 10²³]

For distinction between \[\ce{CH3CHO}\] and \[\ce{C6H5CHO}\] the reagent used is ______.

For the decomposition reaction \[\ce{NH2COONH4 (s) <=> 2NH3 (g) + CO2 (g)}\] the K_p = 2.9 × 10^-5 atm³. The total pressure of gases at equilibrium when 1 mol of \[\ce{NH2COONH4 (s)}\] was taken initially could be ______.

\[\ce{SiCl4 ->[H2O] (A) ->[\Delta] (B) ->[Na2CO3][heat] (C)}\]. The Compound C is ______.

Which of the following compound cannot be produced if 1-propane amine is treated with NaNO₂ and HCl?

Which compound would exhibit optical isomers?

The number of geometrical isomers of \[\ce{[Co(NH3)3 (NO3)3]}\] are ______.

\[\ce{? ->[\Delta, CN-][EtOH, H2O]}\] Benzoin.

The reactant is obtained by dry distillation of the calcium salts of the following pairs:

If O₂ gas is bubbled through water at 303 K, the number of millimoles of O₂ gas that dissolve in 1 litre of water is ______. (Nearest integer)

(Given: Henry's Law constant for O₂ at 303 K is 46.82 k bar and partial pressure of O₂ = 0.920 bar)

(Assume solubility of O₂ in water is too small, nearly negligible)

Henry's constant (in k bar) for four gases α, β, γ and δ in water at 298 K is given below:

(density of water = 10³ kg m^-3 at 298 K)

This table implies that:

Assertion A : Activated charcoal adsorbs SO₂ more efficiently than CH₄.

Reason R : Gases with lower critical temperatures are readily adsorbed by activated charcoal.
In light of the above statements, choose the correct answer from the options given below.

Which of the following statements is incorrect regarding physisorptions?

The major product of the following reaction is:

\[\begin{array}{cc}
\ce{Cl}\phantom{.........................}\\
|\phantom{..........................}\\
\ce{CH3 - CH - CH3 ->[(i) Alc. KOH][(ii) HBr/peroxide (iii) aq. KOH]}
\end{array}\]

The number of asymmetric carbon atoms in the glucose molecule in open and cyclic form is ______.

If the Thomson model of the atom was correct, then the result of Rutherford's gold foil experiment would have been:

Mischmetal is an alloy consisting mainly of ______.