List of practice Questions

A body of mass $m$ is thrown vertically upward with speed $\sqrt{3}v_e^2$, where $v_e$ is the escape velocity of a body from earth surface. The final velocity of the body is

A particle is subjected to two simple harmonic motions in the same direction having equal amplitudes and equal frequency. If the resultant amplitude is equal to the amplitude of the individual motion, the phase difference $(\delta)$ between the two motions is

A body of mass $m$ is thrown with velocity $u$ from the origin of a coordinate axes at an angle with the horizon. The magnitude of the angular momentum of the particle about the origin at time $t$ when it is at the maximum height of the trajectory is proportional to

27 drops of mercury coalesce to form a bigger drop. What is the relative increase in surface energy?

Certain amount of an ideal gas is taken from its initial state 1 to final state 4 through the paths 1 → 2 → 3 → 4 as shown in the figure AB, CD, EF are all isotherms. If $v_p$ is the most probable speed of the molecules, then:

If a string suspended from the ceiling is given a downward force $F_1$, its length becomes $L_1$. Its length is $L_2$ if the downward force is $F_2$. What is its actual length?

One mole of a diatomic ideal gas undergoes a process shown in the P-V diagram. The total heat given to the gas (In 2 = 0.7) is:

Three particles, each of mass $m$ grams situated at the vertices of an equilateral $\Delta ABC$ of side $a$ cm (as shown in the figure). The moment of inertia of the system about a line $AX$ perpendicular to $AB$ and in the plane of $\Delta ABC$ in $g$-cm² units will be:

$y = tan^{-1} (\frac{4 sin 2x}{cos 2x - 6sin^2x})$ then $\frac{dy}{dx}$ at $x=0$.

How many atoms are in a bcc unit cell?

Froth is a Solution of?

The first oxidation of a secondary alcohol is?

Dows process is used.

The highest oxidation state of manganese is?

The radius of the third bohr orbit for H₂ is?

Which is the most unstable carbocation?

Which of the following is not a transition element?

Father of green chemistry is?

In an adiabatic expansion of a gas initial and final temperatures are T₁ and T₂ respectively then the change in internal energy of the gas is [R = gas constant, γ = adiabatic ratio]

A hollow cylinder has a charge q coulomb within it. It ϕ is the electric flux associated with the curved surface B, the flux linked with the plane surface A will be

In hydrogen atom, radius of the smallest orbit of the electron is a₀, the radius of the third orbit is

Which one of the following statements is ‘NOT’ true about the angle of contact of a liquid?

A mass tied to a string is whirled in a horizontal circular path with a constant angular velocity and its angular momentum is L. If the string is now halved, keeping angular velocity same, then the angular momentum will be

In LCR series resonance circuit, choose the wrong statement

A wall is hit elastically and normally by ‘n’ balls per second. All the balls have the same mass ‘m’ and are moving with the same velocity ‘u’. the force exerted by the balls on the wall is