List of top Questions asked in KEAM

PCl$_3$ is stored in a well stoppered bottle since

Among the following, which species represents a pseudohalide?

The carbon atoms in calcium carbide are held by

An example of a non-stoichiometric oxide when heated is

Rare gases are sparingly soluble in water because of

Acetic acid in liquid ammonia behaves as

The compound(s) that does(do) not exist is(are)

According to the VSEPR theory, the shape of ClO$_3^-$ would be

Consider a circular loop of radius R on the $xy$-plane carrying a steady current anticlockwise. The magnetic field at the center of the loop is given by

Consider two parallel current carrying conductors separated by a distance. Which one of the following statements is true?

Which hydride amongst the following has the least boiling point?

NO$^+$ has bond order

Which of the following sets has Lewis acid behaviour for all the components?

The energy gap is much more in silicon than in germanium because

A bat emits an ultrasonic sound wave at $33.0$ kHz and receives an echo $0.1$ s later. What is the distance of the bat from the object-producing echo? (Speed of sound in air is $330$ m/s)

A train sounds its whistle as it approaches an observer standing at a point near the track. The observer measures a frequency of $216$ Hz as the train approaches and a frequency of $184$ Hz as the train leaves. What is the frequency of its whistle?

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

A wave along a string has the following equation $y = 0.05 \sin(28t - 2.0x)$ m (where $t$ is in seconds and $x$ is in meters). What are the amplitude, frequency and wavelength of the wave?

The following figure is the combination of logic gates. The inputs are A and B. The output is C. Which one of the following choices gives the correct matching?

A circuit is made using $R_1, R_2, R_3, R_4$ and a battery as shown in the following figure. Find the equivalent resistance of the given circuit and the current passing through $R_3$

The resistor $R_1 = 3 \ \Omega$ and $R_2 = 1 \ \Omega$ are connected in parallel to a 20 V battery. Find the heat developed in the resistor $R_1$ in one minute

The velocity and acceleration of a particle performing simple harmonic motion have a steady phase relationship. The acceleration shows a phase lead over the velocity in radians of

Consider a driven damped mechanical oscillator is in resonance. Which of the following statements is true?

A body undergoing simple harmonic motion has a maximum acceleration of \( 8\pi \text{ m/s}^2 \) and maximum speed of \( 1.6 \text{ m/s} \). What is the time period \( T \)?

Find the voltage and current passing through the resistor $R_2$ shown in the following circuit