List of top Questions asked in KEAM

Which one of the following is tridentate ligand?
Five cells each of emf $E$ and internal resistance $r$ send the same amount of current through an external resistance $R$ whether the cells are connected in parallel or in series. Then the ratio $\left( \frac{R}{r} \right)$ is
Find the wrongly matched pair
In a reaction $2 A+B \longrightarrow 3 C$, the concentration of $A$ decreases from $0.5\, mol \,L \,^{-1}$ to $0.3\, mol\, L^{-1}$ in $10$ minutes. The rate of production of $C$ during this period is
Two equal forces are acting at a point with an angle of 60$^{\circ}$ between them. If the resultant force is equal to $40\sqrt{3}$, the magnitude of each force is
From a balloon is moving Upwards with velocity $12\, ms^{-1}$. It releases a packet when it is at a height of $65\,m$ from the ground. How much time the packet will take to reach the ground $\left(g=10m/sec^2\right)$
Which one of the following is an outer orbital complex and exhibits paramagnetic behaviour?
If $a =\hat{ i }+2 \hat{ j }+2 \hat{ k },| b |=5$ and the angle between $a$ and $b$ is $\pi / 6$, then the area of the triangle formed by these two vectors as two sides is
Pathogenecity of bacteria causing tuberculosis and leprosy is due to
...................is a potent vasodilator
In one plant adventitious roots are modified for storage and in the other plant a lateral branch with short intemodes and each node bearing a rosette of leaves and a tuft of roots is found. They are
The disease kalaazar is cured by
The main mineralocorticoid in human is
The pigments phycoyanin and phycoerythrin are present in
The bacterial cell wall is made up of
The vitmain which is neither soluble in water nor in fat is
The value of The value of $\frac{2(\cos \, 75^{\circ} + i \, \sin \, 75^{\circ})}{0.2(\cos \, 30^{\circ} + i \, \sin \, 30^{\circ})}$ is
When 2-methoxypropane is heated with HI, in the mole ratio 1: 1, the major products formed are
Two resistors of resistances $ 200\,k\Omega $ and $ 1\,M\Omega $ respectively form a potential divider with outer junctions maintained at potentials of $ +3V $ and $ -15V $ . Then, the potential at the junction between the resistors is
In the circuit shown, the current through the $ 5\,\Omega $ resistor is
In a meter bridge experiment, resistances are connected as shown in figure. The balancing length $ l_1 $ is 55 cm. Now an unknown resistance x is connected in series with P and the new balancing length is found to be 75 cm . The value of x is
Two identical conductors maintained at different temperatures are given potential differences in the ratio 1 : 2. Then the ratio of their drift velocities is
On increasing the temperature of a conductor. its resistance increases because the
An ammeter, voltmeter and a resistor are connected in series to a cell and the readings are noted as $I$ and $V$ . If another resistor $R$ is connected in parallel with voltmeter, then
In a closed circuit, the current $ I $ (in ampere) at an instant of time $t$ (in second) is given by $ I=4-0.08t $ . The number of electrons flowing in $ 50\, s $ through the cross-section of the conductor is