List of top Chemistry Questions asked in KEAM

The chelating ligand used to remove excess of copper and iron in chelate therapy is

List I contains the type of colloid while List II contains the examples

Choose the correct match

The enzyme that converts glucose into ethyl alcohol and carbon dioxide is

For the reaction $X \rightarrow Y$, the concentrations of $X$ are 1.2M, 0.6M, 0.3M and 0.15M at 0, 1, 2 and 3 hours respectively. The order of the reaction is

The half-life period of a first order reaction having rate constant $k = 0.231 \times 10^{-10}$ s$^{-1}$ will be}

How many moles of platinum will be deposited on the cathode when 0.60 F of electricity is passed through a 1.0 M solution of $Pt^{4+}$?}

The standard electrode potentials of Zn and Ni are respectively $-0.76$ V and $-0.25$ V. Then the standard emf of the spontaneous cell by coupling these under standard conditions is

Which one of the following binary liquid mixtures exhibit positive deviation from Raoult’s law?

18 g of glucose is dissolved in 178.2 g of water. The vapour pressure of the solution at 100$^\circ$C is (vapour pressure of pure water at 100$^\circ$C is 760 mm Hg)

The equilibrium constant for the equilibrium $PCl_5(g) \rightleftharpoons PCl_3(g) + Cl_2(g)$ at a particular temperature is $2 \times 10^{-2}$ mol L$^{-1}$. The number of moles of $PCl_5$ that must be taken in a one-litre flask at the same temperature to obtain a concentration of $0.20$ mol of chlorine at equilibrium is}

Equilibrium constants are given for the following two equilibria: \[ (i)\; A_2(g) + B_2(g) \rightleftharpoons 2AB(g); \quad K_1 = 2 \times 10^{-4} \] \[ (ii)\; 2AB(g) + C_2(g) \rightleftharpoons 2ABC(g); \quad K_2 = 2 \times 10^{-2}\, L\, mol^{-1} \] Calculate the equilibrium constant for: \[ ABC(g) \rightleftharpoons \frac{1}{2}A_2(g) + \frac{1}{2}B_2(g) + \frac{1}{2}C_2(g) \]

If the ionic product of $M(OH)_2$ is $5 \times 10^{-10}$, then the molar solubility of $M(OH)_2$ in $0.1$ M NaOH is}

The enthalpy of combustion of glucose (molecular weight = 180 g mol$^{-1}$) is $-2840$ kJ mol$^{-1}$. Then the amount of heat evolved when $0.9$ g of glucose is burnt, will be}

The enthalpy change for a reaction at equilibrium is $-20.5$ kJ mol$^{-1}$. Then the entropy change for this equilibrium at 410 K is}

The hardest lanthanide element is

Which one of the following has a different crystal lattice from those of the rest?

In which one of the following, d-d transition involves absorption in the ultraviolet region

The hybridised state of bromine in bromine pentafluoride is

The relative strengths of trichlorides of boron group to accept a pair of electron is given by

Which one of the following has the maximum number of P–OH bonds?

In the metallurgy of zinc, the reducing agent employed in reducing the zinc oxide to crude zinc metal in the last stage is

Match the following

Which one of the following is reduced by H$_2$O$_2$ in alkaline medium?

The correct order of first ionisation enthalpies of the following elements is

A binary solid has a primitive cubical structure with B$^-$ ions constituting the lattice points and A$^+$ ions occupying 25% of its tetrahedral holes. The molecular formula of the crystal is