List of top Chemistry Questions asked in KEAM

Which of the 3d block element has the minimum melting point?

Iron does not exhibit ___________ oxidation state.

The correct electronic configuration of Uranium (Z=92) is
Which one of the following is an outer orbital complex?
Conformational isomerism is not possible in
When sodium nitroprusside is added to sodium fusion extract the presence of sulphur is indicated by the formation of a violet colored complex. Its formula is
When n-hexane is heated to 773K at 10-20 atmosphere pressure in the presence of \(Cr_2O_3\), benzene is formed. This reaction is called
The decreasing order of reactivity of butyl bromides in \(S_N2\) reaction is
Which of the following is the most acidic compound?
When propanoic acid is treated with bromine and red phosphorus in aqueous medium, 2-bromopropanoic acid is formed. This reaction is known as
Which of the following groups is deactivating ortho-para directing in aromatic electrophilic substitution?
Gatterman reaction is used to convert benzene diazonium chloride to
The correct increasing order of basic strength is
Animal starch is
In which of the following aqueous solutions of salt, is pH independent of the concentration of the salt?
For the reaction:

\[ 3Fe_{(s)} + 2O_2{(g)} \rightarrow Fe_3O_4{(s)} \]

$\Delta H = -1650$ kJ mol-1, $\Delta S = -600$ J K-1 mol-1 at 300K. What is the value of free energy change for the reaction at 300K?
Which of the following pairs of aquated first transition metal ions have the same color?
For the gas phase homogeneous equilibrium:

\[ 2X(g) \rightleftharpoons 2Y(g) + Z(g) \]

$K_C$ at 400K is $1 \times 10^{-3}$ mol L-1. What is the value of $K_P$ for the equilibrium at 400K?

\[ R = 0.082 \, \text{L atm K}^{-1} \, \text{mol}^{-1} \]

Which of the following changes alone would cause increase in the value of the equilibrium constant of the reaction? 
\(PCl_5(g) \rightarrow PCl_3(g) + Cl_2(g); \Delta H>0\)

Which of the following is an example of pseudo first order reaction?

The following results were obtained in the gas phase reaction between nitric oxide and oxygen at a given temperature.

Which of the following molecules has two sigma ($\sigma$) and two pi ($\pi$) bonds?
0.1 M HCl and 0.1 M H2SO4 each of volume 2 mL are mixed and the volume is made up to 6 mL by adding 2 mL of 0.01 N NaCl solution. The pH of the resulting mixture is
The molar enthalpy of vaporization of water at 1 bar and $100^\circ$C is 41 kJ mol$^{-1}$. What is the internal energy change when 1 mol of water is vaporized at 1 bar pressure and $100^\circ$C? Assume water vapor as a perfect gas. (R = 8.3 J K$^{-1}$ mol$^{-1}$)
Octet rule is obeyed in