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

To synthesise 1.0 mole of 2-methylpropan-2-ol from Ethylethanoate ______ equivalents of CH₃MgBr reagent will be required. (Integer value)

The products "A" and "B" formed in above reactions are:

Consider the following reactions:

(i) \[\ce{Glucose + R-OH ->[Conc. HNO3] [A] ->[X eq of][(CH3CO)2O] Acetyl derivative}\]

(ii) \[\ce{Glucose ->[Ni/H2] [A] ->[Y eq of][(CH3CO)2O] Acetyl derivative}\]

(iii) \[\ce{Glucose ->[Z eq of][(CH3CO)2O] Acetyl derivative}\]

'X, 'Y' and 'Z' in these reactions are respectively:

An aldehyde isomeric with allyl alcohol gives phenyl hydrazone. Pick out a ketone that too gives a phenyl hydrazone containing the same percentage of nitrogen.

\[\ce{C3H8O ->[{[O]}][K2Cr2O7/H2SO4] C3H6O ->[I2 + NaOH(aq.)] CHI3}\]

In this reaction the first compound is:

\[\ce{H2O2 -> H2O + O2}\]

This represents ______.

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: