List of top Chemistry Questions asked in KEAM

What is the \(\log K\) of the following reaction, \(2\mathrm{NH_3(g)} + \mathrm{CO_2(g)} \rightleftharpoons \mathrm{NH_2CONH_2(aq)} + \mathrm{H_2O(l)}\) at \(298\,\text{K}\), if \(\Delta_r G^\circ = -11.4\,\text{kJ mol}^{-1}\) and \(2.303RT = 5.7\,\text{kJ mol}^{-1}\)?
\( \mathrm{Fe_2O_{3(s)} + 3H_{2(g)} \rightarrow 2Fe_{(s)} + 3H_2O_{(l)}} \) \(\text{(Given: } \Delta H^\circ(\mathrm{H_2O_{(l)}}) = -285.83\,\text{kJ mol}^{-1},\ \Delta H^\circ(\mathrm{Fe_2O_{3(s)}}) = -824.2\,\text{kJ mol}^{-1}\text{)}\)
The rate constant for the hydrolysis of sucrose by an enzyme at $300\,K$ is $k_1$ and at $320\,K$ is $1.25k_1$. The activation energy is (in kJ mol$^{-1}$):
Which of the following is Hinsberg's reagent?
The order of reactivity of the following compounds towards SN2 displacement reaction is (i) \(C_{6}H_{5}CH(CH_{3})Br\) (ii) \(C_{6}H_{5}CH(C_{6}H_{5})Br\) (iii) \(C_{6}H_{5}C(CH_{3})(C_{6}H_{5})Br\) (iv) \(C_{6}H_{5}CH_{2}Br\)
\(CH_3 - CH_2 - CH(CH_3) - CH(CH_3) - ONa + C_2H_5Br \rightarrow\)
The major product obtained in the dehydration of ethanol in the presence of \(H_{2}SO_{4}\) at 413 K is
Which of the following compound has the highest boiling point?
Which of the following acid is highly acidic?
Bromoethane on treatment with sodium metal in dry ethereal solution gives
The IUPAC name of the compound \(HOCH_2(CH_2)_3CH_2COCH_3\) is
Which of the following pair of actinoids exhibit maximum oxidation state of \(+7?\)
Which of the following is an electron donating group?
The IUPAC name of \([Co(en)_3]_2(SO_4)_3\) is
Chromite ore is
In the Arrhenius equation, \(k = Ae^{- Ea / RT}\), which factor corresponds to the fraction of molecules that have kinetic energy greater than activation energy ?
What is the half life period of the first order reaction whose rate constant is \(2.31 \times 10^{- 1} \mathrm{~s}^{- 1}\)
Which of the following transition metal does not exhibit variable oxidation state?
The magnetic moment of a divalent ion in aqueous solution is 3.87 BM. The number of unpaired electrons present in it is
Which of the following solutions of salts are neutral?
(i) KBr (ii) \(NaNO_{2}\) (iii) KF (iv) \(NH_{4}NO_{3}\) (v) NaCl
The molar conductivity \((\Lambda_{m})\) acetic acid is \(78.1 \text{S cm}^{2} \text{mol}^{-1}\) . Its degree of dissociation \((\alpha)\) is \((\Lambda_{m}^{0})\) for acetic acid= 390.5 S \(cm^{2} \text{mol}^{-1}\)
Which of the following reaction is used to prepare dihydrogen gas in the laboratory?

Which of the following reaction proceeds nearly to completion?
Reaction 
A) \(N_{2(g)} + O_{2(g)}\rightleftharpoons 2NO_{(g)}\) at 298 K \(4.8\times 10^{-3}\) 
B) \(H_{2(g)} + Cl_{2(g)}\rightleftharpoons 2HCl_{(g)}\) at 300 K \(4.0\times 10^{31}\) 
C) Decomposition of \(H_{2}O\) into \(H_{2}\) and \(O_{2}\) at 500 K \(4.1\times 10^{-48}\) 
D) Reaction of \(H_{2}\) with \(I_{2}\) to give HI at 700 K 57.0 
E) Gas phase decomposition of \(N_{2}O_{4}\) to \(NO_{2}\) at 298K \(4.64\times 10^{-3}\) 
 

In which of the following solutions X- Y interactions are weaker than X- X or Y- Y interactions? (Where, X and Y are pure components)
Which of the following molecules have $\mathrm{dsp}^{2}$ hybridisation?
(i) $[Ni(CN)_4]^{2-}$
(ii) $BrF_5$
(iii) $[Co(NH_3)_6]^{3+}$
(iv) $[CrF_6]^{3-}$
(v) $[PtCl_4]^{2-}$