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

In the following reaction, the reason for why meta-nitro product also formed is:

According to the valence bond theory, the hybridization of central metal atom is dsp² for which one of the following compounds?

Match List I with List II.

Choose the correct answer from the options given below:

The vapour pressures of pure liquids A and B are 400 and 600 mm Hg, respectively at 298 K On mixing the two liquids, the sum of their initial volumes is equal to the volume of the final mixture. The mole fraction of liquids B is 0.5 in the mixture. The vapour pressure of the final solution, the mole fractions of components A and B in vapour phase, respectively are ______.

What would be the product when ethene is oxidised with cold dil. KMnO₄ solution?

Heating of MgCl₂ 6H₂O in absence of HCl gives ______.

The decomposition of N₂O into N₂ and O₂ in the presence of gaseous argon follows second-order kinetics, with k = (5.0 × 10¹¹ L mol⁻¹ s⁻¹) `"e"^(-(29000  "K")/"T")`. Arrhenius parameters are ______ kJ mol⁻¹.

Carbon deposition reaction taking place in ______.

If the value of K_sp for Hg₂Cl₂ (s) is X then the value of X will be ____ where pX = - log X.
Given:

\[\ce{Hg2Cl2 + 2e- -> 2Hg(l) + 2Cl-}\],  E° = 0.27 V

\[\ce{Hg+2 + 2e- -> 2Hg(l)}\]   E° = 0.81 V

The spectral lines of atomic hydrogen wave number is equal to the difference between the wave numbers of the following two lines of the Balmer series: 486.1 and 410.2 nm. The wavelength of that line is  ______ × 10^-4 cm.

An exothermic reaction X → Y has an activation energy 30 kJ mol^-1. If energy change ΔE during the reaction is - 20 kJ, then the activation energy for the reverse reaction in kJ is ______.

A schematic plot of ln K_eq versus inverse of temperature for a reaction is shown below

The reaction must be:

Assertion: For the extraction of iron, haematite ore is used.

Reason: Haematite is a carbonate ore of iron.

Which of the following is incorrect?

\[\ce{Au + CN^- + H2O + O2 -> [Au(CN)2]^- + OH^-}\]

The number of CN⁻ ions involved in the balanced equation is ______.

Heat treatment of muscular pain involves radiation of a wavelength of about 900 nm. Which spectral line of H-atom is suitable for this purpose?

[R_H = 1 × 10⁵ cm⁻¹, h = 6.6 × 10⁻³⁴ Js, c = 3 × 10⁸ ms⁻¹]

Which one of the following chemicals have not been used for the dry cleaning of clothes?

Which of the following carbocation's is most stable?

The structure of a protein that is unaffected by heating is ______.

(I)	(II)	(III)	(IV)

Among the given species the resonance stabilised carbocations are: