List of top Chemistry Questions asked in KEAM

The O-H bond length in methanol is}

On treating the sodium fusion extract with sodium nitroprusside, the blood red colour is formed due to the formation of}

The pair of elements that has similar atomic radii is}

Which one of the statements is not the limitation of valence bond theory of complexes?}

Which of the following method/s is/are used in the estimation of nitrogen in organic compounds?
(i) Carius method
(ii) Dumas method
(iii) Silver salt method
(iv) Kjeldhal method}

Which of the following lanthanide ion is coloured?}

The IUPAC name of the complex \([Co(NH_3)_5ONO]Cl_2\) is}

A compound of manganese that has intense colour, diamagnetic and temperature dependent weak paramagnetic. What is the compound?}

Which of the following statement is incorrect?}

The salt which has van’t Hoff factor (\(i\)) as 1.82 in 0.001 m aqueous solution is}

For the elementary reaction, \(M \to N\), the rate of disappearance of ‘M’ increases by a factor of 8 upon doubling the concentration of M. The order of the reaction with respect to M is}

At 300 K a first order reaction is 50 % completed in 10 minutes. What is the rate constant value of the reaction at this temperature? \((\log 2 = 0.3)\)}

A first order reaction is completed 99% in 20 minutes at 300 K. What is the half-life period of the reaction at the same temperature?}

The oxidation number of oxygen in \(O_2\), \(O_2F_2\) and \(RbO_2\) are respectively}

100 cm\(^3\) of an aqueous solution of a protein contains 1.5 g of the protein. The osmotic pressure of such a solution at 300 K is found to be \(4.5 \times 10^{-3}\) bar. The molar mass of the protein is \([R = 0.083 \text{ L atm mol}^{-1}\text{ K}^{-1}]\)}

Which of the following statement is incorrect?}

In which of the following equilibrium reaction, pressure does not influence the equilibrium at constant temperature?}

Using stock notation, match the oxidation number against metal in its compound.}

At equilibrium, \([N_2] = 1.5 \times 10^{-3}M\), \([O_2] = 2 \times 10^{-3}M\) and \([NO] = 3 \times 10^{-3}M\) at 800 K in a closed vessel. The \(K_c\) for the equilibrium \(N_2(g) + O_2(g) \rightleftharpoons 2NO(g)\) at 800 K is}

Four elements and their electronegativity values (Pauling Scale) are given below. Match the element with its electronegativity value.}

Which of the following set of compounds does not follow octet rule?}

For the equilibrium what is the value of \(\log_{10}K\) at 298 K? \((\Delta_r H^\circ = -54.07 \text{ kJ mol}^{-1}, \Delta_r S^\circ = 10 \text{ J K}^{-1}\) and \(2.303RT = 5705)\)}

The number and type of bonds between nitrogen and three oxygen atoms in \(HNO_3\) by Lewis representation is}

An ideal gas is allowed to expand from 1 L to 10 L against a constant external pressure of 1 bar. The work done is [1 bar = 100 J]}

Which of the following statement is NOT the postulate of VSEPR theory?}