List of top Questions asked in KEAM

A sample of phosphorus trichloride $(PCl_3)$ contains 1.4 moles of the substance. How many atoms are there in the sample ?

Disaccharide in milk is

A transverse wave is described by the equation $ y={{y}_{0}}\sin 2\pi \left( ft-\frac{x}{\lambda } \right). $ The maximum particle velocity is equal to four times the wave velocity, if

After terminal velocity is reached, the acceleration of a body falling through a fluid is

Aldehydes that do not undergo aldol condensation are (1) propanal (2) trichloroethanal (3) methanal (4) ethanal (5) benzaldehyde

For two isomorphous crystals $A$ and $B$, the ratio of density of $A$ to that of $B$ is $1.6$ while the ratio of the edge length of $B$ to that of $A$ is $2$. If the molar mass of crystal $B$ is $200\,g\,mol^{-1}$, then that of crystal $A$ is

Gabriel synthesis is used for the synthesis of:

Homolytic fission of a covalent bond leads to the formation of

Identify the product and its colour when $MnO_2$ is fused with solid $KOH$ in the presence of $O_2$

Choose the weak monobasic acid, among the following

A stone falls freely from rest from a height $h$ and it travels a distance $\frac{9h}{25}$ in the last second. The value of $h$ is

The wavelength of a 1 keV photon is 1.24 nm. The frequency of 1 MeV photon is:

If the unit of force and length are doubled, the unit of energy will be

In petrochemical industry, alcohols are directly converted to gasoline by passing over heated

An electric dipole consists of two opposite charges each 0.05 $\mu$C separated by 30 mm. The dipole is placed in an uniform external electric field of $ 10^6 \, NC^{ - 1}$. The maximum torque exerted by the field on the dipole is

The value of ($\Delta H - \Delta E$) for the reaction $C_6H_6(1) + 7\frac{1}{2} O_2(g) \rightarrow 6CO_2(g) + 3H_2O(I)$ at 270C is (R = 2 cal K-1 mol-1)

Identify the mismatched pair from the following

A particle of mass $m$ and charge $q$ with an initial velocity $v$ is subjected to a uniform magnetic field $B$ along the vertical direction. The particle will

A particle of mass m is moving along the x-axis under the potential $V (x) = \frac{kx^2}{2} + \frac{\lambda}{x}$, where $k $ and $\lambda$ are positive constants of appropriate dimensions. The particle is slightly displaced from its equilibrium position. The particle oscillates with the angular frequency $\omega$ given by

The length of a rubber cord is $ {{l}_{1}} $ metre when the tension is $ 4\, N $ and $ {{l}_{2}} $ metre when the tension is $ 6\, N $ . The length when the tension is $9\,N$, is

Two planets have radii $r_1$ and $r_2$ and densities $d_1$ and $d_2$ respectively. Then the ratio of accelerations due to gravity on them is

The reaction of propene with $HBr$ in peroxide proceeds through the intermediate

A voltage $V_{PQ} = V_0 \, \cos \, \omega t$ (where $V_0$ is a real amplitude) is applied between the points P and Q in the network shown in the figure. The values of capacitance and inductance are $C = \frac{1}{\omega R \sqrt{3}}$ and $L = \frac{R \sqrt{3}}{\omega}$ Then, the total impedance between P and Q is

In alkaline medium $ Cl{{O}_{2}} $ oxidizes $ {{H}_{2}}{{O}_{2}} $ to $ {{O}_{2}} $ and itself gets reduced to $ C{{l}^{-}} $ . How many moles of $ H_20_2 $ are oxidized by 1 mole of $ Cl{{O}_{2}} $ ?

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