List of top Chemistry Questions asked in KEAM

The formula of Ammonium phosphomolybdate is
The percentage of Cr(III) in Ruby is
The most common oxidation states of chromium are
The first and second ionization enthalpies of lanthanoids are comparable with the element
What is the magnetic moment of a divalent ion with three unpaired electrons?
Which of the following transition elements has both bcc and ccp structures at normal temperature?
Which of the following transition metal oxide is used in dry battery cells?
The bond angle of Cr-O-Cr bond in dichromate ion is
Which of the following compounds is used to cover the surface of a metallic object to prevent corrosion?
Given the reaction: \[ \text{Cu(s)} + 2\text{Ag}^+_{(aq)} \rightleftharpoons \text{Cu}^{2+}_{(aq)} + 2\text{Ag(s)} \quad (\text{E}_{\text{cell}}^\circ = 0.295 \, \text{V}, \, 2.303 \, \frac{RT}{F} = 0.059 \, \text{V}) \] What is the value of the equilibrium constant \( K \)?
In a reaction, \( 3A \rightarrow \text{Products} \), the concentration of \( A \) decreases from 0.6 mol L\(^{-1}\) to 0.3 mol L\(^{-1}\) in 20 minutes. What is the rate of the reaction during this interval?
At equilibrium, the concentration of \( N_2 = 5 \times 10^{-3} \, \text{M} \), \( O_2 = 2.8 \times 10^{-3} \, \text{M} \), and \( NO = 1.4 \times 10^{-3} \, \text{M} \) in a sealed vessel at 800 K. What is the value of \( K_c \) for the reaction at the same temperature? \[ N_2(g) + O_2(g) \rightleftharpoons 2NO(g) \]
Which of the following molecules has the highest standard enthalpy change of fusion (\( \Delta_{fus}H^\circ \)) (in kJ mol\(^{-1}\))?
Which of the following gases has the lowest solubility in water at 298 K?
Which of the following is an extensive property?
Which of the following molecules has an expanded octet?
Which of the following molecules has 3 bond pairs and 2 lone pairs of electrons?
Which of the following is correct about the stability of half-filled and completely filled subshells?
(i) Relatively small shielding
(ii) Larger coulombic repulsion energy
(iii) Smaller exchange energy
(iv) Smaller coulombic repulsion energy
(v) Larger exchange energy
The increasing order of atomic radii is
The correct order of ionization enthalpy is
The order of energy of orbitals in the same subshell is
A solution is prepared by adding 4 g of a substance to 46 g of ethanol. What is the mass percentage of the solute?
\( E^\circ_{\text{Cell}} = 1.1 \, \text{V}. \, \text{Find} \, E_{\text{Cell}} \, \text{for the reaction:} \, \text{Zn} + \text{Cu}^{2+} \, (0.1M) \rightleftharpoons \text{Zn}^{2+} \, (0.001M) + \text{Cu} \)
A first-order reaction is 75 percent completed in 6000s. What is the half-life?
Total number of orbitals when \( n = 3 \)?