List of top Chemistry Questions asked in KEAM

Which of the following has the highest \( K_b \) value?
Find the rate constant at 310K if the initial concentration is 0.72 mol L$^{-1}$ and the final concentration is 1.44 mol L$^{-1}$ at 10 minutes.
Initial concentration of a reaction is \( 1.68 \times 10^{-2} \) and after 10 minutes concentration becomes \( 0.84 \times 10^{-2} \). Then the rate of concentration in minutes is:
Find the pH of the solution if \( [\text{H}^+] = 2 \times 10^{-4} \, \text{mol/L} \).
Which of the following bond enthalpies is the least: \[ C = C, C = O, C \equiv N, C = N \]
What is the order of the SN2 reaction for the compounds: \[ \text{2-methyl-2-bromo-butene}, \quad \text{2-bromo-butene}, \quad \text{1-bromo-butane} \]
Common oxidation state of Cr?
What technique is used to separate chloroform from aniline?
Among the following, which one is incorrect? \[ \text{BrF}_5 \rightarrow \text{Trigonal bipyramidal}, \quad \text{SF}_4 \rightarrow \text{See saw}, \quad \text{NH}_3 \rightarrow \text{Pyramidal}, \quad \text{XeF}_4 \rightarrow \text{Square planar} \]
Arrange in the order of dipole moment: \[ \text{NH}_3, \, \text{NF}_3, \, \text{H}_2\text{S}, \, \text{CHCl}_2 \]
Which among the following has the highest molar elevation constant?
Which of the following is the set of neutral oxides? (a) \( \text{Al}_2\text{O}_3, \text{Cl}_2\text{O}_7 \), b) \( \text{N}_2\text{O}, \text{CO} \)
The disease is caused by a deficiency of riboflavin.
What is the formula of lanthanoids with sulfur?
In which of the following cases does manganese have a +7 oxidation state?
Number of sigma and pi bonds in methyl but-1-ene is:
Which has a higher boiling point ?
Find the half-life of a first order reaction if $ K = 2.31 \times 10^5 \, \text{s}^{-1} $.
Formula of chromium ore?
Which of the following are neutral?
Bromomethane on reaction with Na and dry ether gives:
What is incorrect for Bond order?
Ethyl alcohol on reaction with $ H_2SO_4 $ at 413 K gives:
Which complex has dsp$^2$ hybridisation?
What is the hydration enthalpy of sucrose?