List of top Questions asked in KEAM

The ratio of the intensities of two waves is 16 : 9. The ratio of their amplitudes is

When the temperature of a rod increases from t to t $+ \Delta t$ its moment of inertia increases from I to I + $\Delta I$ . If $\alpha$ be the coefficient of linear expansion of the rod, then the value of $\frac{\Delta I}{I}$ is

The $x-t$ plot shown in the figure below describes the motion of the particle, along $x-axis$, between two positions $A$ and $B$. The particle passes through two intermediate points $P_1$ and $P_2$ as shown in the figure

Two wires with currents $2\,A$ and $1\,A$ are enclosed in a circular loop. Another wire with current $3\, A$ is situated outside the loop as shown. Then $ \oint{\overrightarrow{B}}.\overrightarrow{dl} $ around the loop is

Two perfectly black spheres $A$ and $B$ having radii $8\,cm$ and $2\,cm$ are maintained at temperatures $127^{\circ}C$ and $527^{\circ}C$ respectively. The ratio of the energy radiated by $A$ to that by $B$ is

Persons who are colourblind cannot distinguish

In frequency modulation

Which of the following is/are true ? I. Biowar - Biowar is the use of biological weapons against humans and or their crops and animals. II. Bioethics - Bioethics is the unauthorised use of bioresources and traditional knowledge related to bioresources for commercial benefi ts. III. Biopatent - Exploitation of bioresources of other nations without proper authorization

Which one of the following is correctly paired ?

Which one of the following is not a characteristic feature of the subphylum Vertebrata ?

Choose the correct sequence in the hierarchy of taxonomic categories in desending order

The solution set of the in equation $ \frac{x+11}{x-3}>0 $ is

The following set of reactions are used in refining zirconium. $Zr (impure) + 2I_2$ ${->[523K]}$ $ZrI_4$ ${->[1800K]}$ Zr (pure) +$2I_2$ This method is known as

Which of the following bases is not present in $DNA$ ?

The covalent bond length is the shortest in which one of the following bonds?

The linkage between the two monosaccharide units in lactose is

The set of all real $ x $ satisfying the in equal $ \frac{3-|x|}{4-|x|}\ge 0 $

If $\left(1+x+x^{2}\right)^{n} =1+a_{1}x+a_{2}x^{2} +\cdots+a_{2n}x^{2n}$, $2a_{1} -3a_{2} +\cdots-\left(2n+1\right)a_{2n}$ is equal to

The average oxidation state of sulphur in $Na_2S_4O_6$ is

Choose the disproportionation reaction among the following redox reactions

The magnetic flux linked with a coil of $N$ turns of area of cross section $A$ held with its plane parallel to the field $B$ is

Water is heated from $0^\circ\,C$ to $10\, ^\circ\,C$. then its volume

When (-)-2-methylbutan-1-ol is heated with concentrated hydrochloric acid, (+) 1-chloro-2-methylbutane is obtained. The reaction is an example of

Which one of the following reagent will convert acetamide to ethanamine?

In the eclipsed conformation of ethane, the dihedral angle between the hydrogen atoms of adjacent methyl groups is