List of top Questions asked in KEAM

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
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? \[ N_2(g) + O_2(g) \rightleftharpoons 2NO(g) \]
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?
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 \( K \)?
Which of the following gases has the lowest solubility in water at 298 K?
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 compounds is used to cover the surface of a metallic object to prevent corrosion?
Which of the following is an extensive property?
The increasing order of atomic radii is
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
Which of the following molecules has an expanded octet?
The correct order of ionization enthalpy is
Which of the following molecules has 3 bond pairs and 2 lone pairs of electrons?
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?
Given that \( \vec{a} \parallel \vec{b} \), \( \vec{a} \cdot \vec{b} = \frac{49}{2} \), and \( |\vec{a}| = 7 \), find \( |\vec{b}| \).
If force is 500 N and instantaneous velocity is 20 m/s, what is the instantaneous power?
Forces acting on 2 bodies of masses 2kg and 3kg are same. What is the ratio of their acceleration?
Given $ y = \sec(\tan^{-1}(x)) $, find $ \frac{dy}{dx} $ at $ x = \sqrt{3} $.
The acceleration of a particle varies with time as \( a = 6t \). What is the displacement and velocity of the particle at \( t = 4s \)?
Water flows through a pipe with velocity \( V_1 = 3 \, \text{m/s} \) where the area of the pipe is \( A_1 \). What is the velocity \( V_2 \), where the diameter of the pipe is half of that at area \( A_1 \)?
\( E^\circ_{\text{Cell}} = 1.1 \, \text{V}. \, \text{Find} \, E_{\text{Cell}} \, \text{for the reaction:} \, \text{Zn} + \text{Cu}^{2+} \, (0.1M) \rightleftharpoons \text{Zn}^{2+} \, (0.001M) + \text{Cu} \)
If \[ \frac{x}{4} + \frac{x}{3} < 13, \text{ then } x \in \]
Solution set of \( -12x > 38 \text{ for } x \in \mathbb{N} \) \[ -12x > 38 \]