List of practice Questions

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 :

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:

Velocity-time curve for a body, projected vertically upwards, 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 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 $g = 10\, m/s^2$):

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 :

Which of the following is true for $CO_2$ concentration?

Which is more acidic ?

Which is an autoimmune disease ?

What is the value of linear velocity, if angular velocity is $3 \hat i - 4 \hat j + \hat k$ and distance from the centre is $5 \hat i - 6 \hat j + 6 \hat k$ ?

Sucrose, a common sugar, is composed of

When methyl-t-butyl ether is formed ?

What is the pressure of 2 mole of $NH_3$ at 27$^\circ$C when its volume is 5 lit. in van der Waals equation (a = 4.17, b = 0 .03711)

N forms $NCl_3$ whereas P can form both $PCl_3$ and $PCl_5$. Why ?

........................is not true for Euglena.

Insulin and glucagon are transported to target organ by

Figure shows a body of mass m moving with a uniform speed $v$ along a circle of radius $r$. The change in velocity in going from $A$ to $B$ is:

What is the value of linear velocity, if angular velocity is $3 \hat i - 4 \hat j + \hat k$ and distance from the centre is $5 \hat i - 6 \hat j + 6 \hat k$ ?

The angular momentum of a system of particles is not conserved :

Figure shows a body of mass m moving with a uniform speed $v$ along a circle of radius $r$. The change in velocity in going from $A$ to $B$ is:

A square wire frame of size $L$ is dipped in a liquid. On taking out, a membrane is formed. If the surface tension of liquid is $T$, the force acting on the frame will be :

Clamp connection is found in

Cell plate formation starts from

Arrhenotoky is related to