List of top Chemistry Questions

The complex formed when $Al_2O_3$ is leached from Bauxite using concentrated NaOH solution is,

Sulphur sol contains

Reactions in zeolite catalyst depend on,

Main axis of a diatomic molecule is $Z$, molecular orbital $p_x $ and $ p_y$ overlaps to form, which of the following orbitals?

$HCl$ gas is covalent and $NaCl$ is an ionic compound. This is because

The carbocation formed in $ S_N1 $ reaction of alkyl halide in the slow step is:

For the reaction $2SO_2 + O_2$ (excess) $\rightarrow\, 2SO_3$ the order of reaction with respect to $O_2$ is

The value of ($\Delta H - \Delta E$) for the reaction $C_6H_6(1) + 7\frac{1}{2} O_2(g) \rightarrow 6CO_2(g) + 3H_2O(I)$ at 270C is (R = 2 cal K-1 mol-1)

Accumulation of which of the following molecules in the muscles occurs as a result of vigorous exercise ?

A pink coloured salt turns blue on heating. The presence of which cation is most likely ?

Which one of the following structures represents the neoprene polymer ?

What is the major product expected from the following reaction ?

Where D is an isotope of Hydrogen.

Which compound exhibits maximum dipole moment among the following ?

In the reaction sequence
\(2\,\mathrm{CH_3CHO}\xrightarrow{\mathrm{OH^-}}\mathrm{A}\xrightarrow{\Delta}\mathrm{B}\) ; the product B is :

The number of structural isomers for \(\mathrm{C_6H_{14}}\) is :

Match the organic compounds in column - I with the Lassaigne's test results in column - II appropriately :

Column - I	Column - II
(A) Aniline	(i) Red color with \(\mathrm{FeCl_3}\)
(B) Benzene sulfonic acid	(ii) Violet color with sodium nitroprusside
(C) Thiourea	(iii) Blue color with hot and acidic solution of \(\mathrm{FeSO_4}\)

When concentrated HCl is added to an aqueous solution of \(\mathrm{CoCl_2}\), its colour changes from reddish pink to deep blue. Which complex ion gives blue colour in this reaction ?

Which of the following complex ions has electrons that are symmetrically filled in both \(t_{2g}\) and \(e_g\) orbitals ?

Which of the following statements is false ?

Which of the following compounds has a \(\mathrm{P-P}\) bond ?

Which of the alkaline earth metal halides given below is essentially covalent in nature ?

\(\mathrm{A + 2B \rightarrow C}\), the rate equation for this reaction is given as
Rate = k[A][B].
If the concentration of A is kept the same but that of B is doubled what will happen to the rate itself ?

Calamine is an ore of :

Under ambient conditions, which among the following surfactants will form micelles in aqueous solution at lowest molar concentration ?

For the equilibrium, \(\mathrm{A(g) \rightleftharpoons B(g)}\), \(\Delta H\) is \(-40\) kJ/mol. If the ratio of the activation energies of the forward (\(E_f\)) and reverse (\(E_b\)) reactions is \(\frac{2}{3}\) then :