List of practice Questions

2 moles of a solute is dissolved in 1 kg water (K\_b = 0.52 K kg mol}^{-1}{). The solute dissociates to give 3 moles of particles in solution. The elevation of boiling point will be:
The boiling point and melting point of a pure solvent are 353.3 K and 278.6 K, respectively. A solute is dissolved in the solvent to get a solution. Which one of the following can be true?
According to Bohr's theory, when principal quantum number is 2, the radius of \( \text{Be}^{3+} \) will be:
The most effective reaction for the synthesis of 1-methoxy-4-nitrobenzene is:
Among the following, the molecule which shows aromatic character is:
Identify the essential amino acid among the following:
O_2 molecule has:
The densities of the nuclei: \(^{24}_{12}Mg\), \(^{40}_{20}Ca\) and \(^{88}_{38}Sr\),
In the following circuit, the charge stored in capacitors \( C_1 \), \( C_2 \), and \( C_3 \) are
The molar conductance of KCl, HCl and \( \text{CH}_3 \text{COOK} \) are 152, 425 and 91 cm\(^2\) ohm\(^-1\) respectively. Here, the molar conductance of \( \text{CH}_3 \text{COOH} \) at infinite dilution would be.
In K[Cr(H\(_2\)O)\(_6\)](C\(_2\)O\(_4\))\(_2\)] .3H\(_2\)O, the spin only magnetic moment of Cr\(^3\) ion is
The CORRECT order of ionic radii of the following lanthanides is:
Among the following, the compound with highest melting point is:
Consider the following spring configurations:
If the first spring is stretched by an amount \( \Delta x \), the second system will be stretched by:
Which of the following is not a representation of uniform motion?
The magnetic properties of magnets are
Diffraction of light involves
The torque of a force \( \mathbf{F} = 4\hat{i} - 2\hat{j} + 3\hat{k} \) about the origin is \( \mathbf{r} \). The force acts on a particle having position vector \( \hat{i} + 2\hat{j} - \hat{k} \). Then the torque \( \mathbf{r} \) is:
A wire of length \( L \) meter carrying current \( i \) ampere is bent in the form of a circle. The magnitude of its magnetic moment in SI units is:
In the circuit below, A and B represent two inputs and C represents the output. The circuit represents:
The current I drawn from the 5 volt source will be:
A particle is moving in a uniform circular motion of radius \( R \) with angular velocity \( \omega \) in the anti-clockwise direction. Another particle is also moving along the same circular path but in the clockwise direction with the same angular velocity \( \omega \). Suppose, both the particles start at \( t = 0 \) from the same point (R, 0) in opposite directions. The minimum time \( t \) after which the velocities of the two particles become orthogonal to each other is:
A particle moves in a circle of radius \( R \). In half the period of revolution its displacement and distance covered respectively are:
The work function of a given metal is 4 eV. The longest wavelength of light that can cause photoelectron emission from this metal is:
A point object is placed at a distance of 25 cm from a thin plano-convex lens of focal length 20 cm. The plane surface of the lens is now silvered. The image created by the system is at: