List of top Questions asked in BHU UET

If $20 \,g$ of a solute was dissolved in $500 \,mL$ of water and osmotic pressure of the solution was found to be $600\, mm$ of $Hg$ at $15^{\circ} C$, then molecular weight of the solute is:

According to Bohr's principle, the relation between principle quantum number $(n)$ and radius of orbit is :

For a Carnot engine, the source is at $500\, K$ and the sink at $300\, K$. What is efficiency of this engine?

The number of sodium atoms in $2$ moles of sodium ferrocyanide is:

According to Heisenberg's uncertainty principle, the product of uncertainties in position and velocities for an electron of mass $9.1\times {{10}^{-31}}\,kg$ is:

The state of hybridisation of $B$ in $BC{{l}_{3}}$ is:

Escape velocity at surface of earth is $11.2\,km/s$. Escape velocity from a planet whose mass is the same as that of earth and radius $1/4$ that of earth, is :

Velocity-time curve for a body, projected vertically upwards, is:

A $100\, m$ long train is moving with a uniform velocity of $45\, km/h$. The time taken by the train to cross a bridge of length $1\, km$ is:

The frequency of vibration of string is given by $v=\frac{P}{2l}{{\left[ \frac{F}{m} \right]}^{1/2}}$ Here $p$ is number of segments in the string and $l$ is the length. The dimensional formula for $m$ will be:

A ball of mass $150\,g$ moving with an acceleration $20 \,m/s^2$ is hit by a force, which acts on it for $0.1\, s$. The impulsive force is :

A cylinder of mass $10 \,kg$ is rolling on a rough plane with a velocity of $10 \,m/s$. If the coefficient of friction between the surface and cylinder is $0.5$, then before stopping it will cover a distance of (Take $g = 10\, m/s^2$):

Strongest nucleophile is:

Ratio of molecular weights of $A$ and $B$ is $\frac{4}{25}$ then ratio of rates of diffusion will be:

An iron rod of length $2 \,m$ and area of cross-section $50\,mm^{2}$ stretches by $0.5\,mm$ , when a mass of $250\, kg$ is hung from its lower end. The Young's of iron rod is:

An object of mass $40\, kg$ and having a velocity $4\, m/s$ collides with another object $\left( m=60\,kg \right)$ having velocity $2\, m/s$. The collision is perfectly inelastic. The loss in energy is:

If the potential energy of a body on a planet is numerically $U$ and the escape velocity for the same body be $v_{e}$ for the same planet then $U / v_{e}$ will be :

A car of mass $m$ moves in a horizontal circular path of radius $r$ meter. At an instant its speed is $v\,m/s$ and is increasing at a rate a $m/s^{2}$ , then the acceleration of the car is:

A running man has half the kinetic energy of that of a boy of half of his mass. The man speeds up by $1\,m/s$ , so as the have same kinetic energy as that of the boy. The original speed of the man is:

$n$ small balls, each of mass $m$ impinge elastically each second on a surface with a velocity $u$ , then the force experienced by the surface in one second, will be:

An earth satellites $S$ has an orbit radius which is $4$ times that of communication satellite $C$. The period of revolution of $S$ will be:

A wet open umbrella is held vertical and it whirled about the handle at a uniform rate of $21$ revolutions in $44\, s$. If the rim of the umbrella is a circle of $1\, m$ in diameter and the height of the rim above the flour is $4.9\, m$, the locus of the drop is a circle of radius:

Dimensions of surface tension are:

The moment of inertia of a body about a given axis is $1.2 \,kg - m ^{2}$. To produce a rotational kinetic energy of $1500\, J$ an angular acceleration of $25\, rad / s ^{2}$ must be applied for :

Which solutions are mixed to form a buffer solution ?