List of practice Questions

Which of the following is not true for $S_N1$ reaction ?

Which of the following is the correct pathway of absorbed water in the roots of plants ?

Which of the following statements is not true for Nostoc ?

X-rays, gamma rays and microwaves travelling in vacuum have

Two thin plano-convex lenses each of focal length $f$ are placed as shown in the figure. The ratio of their effective focal lengths in the three cases is

The value of $^{10}C_1+^{10}C_2+^{10}C_3+....+^{10}C_9 $ is

The $pH$ of the solution obtained by mixing $100\, ml$ of a solution of $pH = 3$ with $400\, ml$ of a solution of $pH = 4$ is

The correct order of electronegativities of $N, O, F$ and $P$ is

Sucrose is NOT a reducing sugar since

Power alcohol is a mixture of

In the loop shown, the magnetic induction at the point $O$ is

If father shows normal genotype and mother shows a carrier trait for haemophilia:

A planet moving around sun sweeps area $A_1$ in $2$ days, $A_2$ in $3$ days and $A_3$ in $6$ days. Then the relation between $A_1, A_2 $ and $A_3$ is

When a mass is rotating in a plane about a fixed point, its angular momentum is directed along

The common bottle cork is a product of

If $v_e$ is escape velocity and $v _o$ is orbital velocity of a satellite for orbit close to the earth's suface, then these are related by

A car of mass m starts from rest and accelerates so that the instantaneous power delivered to the car has a constant magnitude $P_0$. The instantaneous velocity of this car is proportional to

Earthworms have no skeleton but during burrowing, the anterior end becomes turgid and acts as a hydraulic skeleton. It is due to

Amongst \( \text{Ni(CO)}_4 \), \( [\text{Ni(CN)}_4]^{2-} \), and \( [\text{NiCl}_4]^{2-} \), which is paramagnetic?

In which of the following octahedral complexes of Co (At no. 27), will the magnitude of \( \Delta_o \) be the highest?

Assertion (A): \( \text{Cu}^{2+} \) and \( \text{Cd}^{2+} \) are separated by first adding KCN solution and then passing H\(_2\)S gas. Reason (R): KCN reduces \( \text{Cu}^{2+} \) to \( \text{Cu}^+ \) and forms a complex with it.

The effective atomic number of cobalt in the complex \( [\text{Co(NH}_3)_6]^{3+} \) is:

The IUPAC name for the complex \( [\text{Co(NO}_3)_6\text{NH}_3]^{3+} \) is:

The freezing point of a solution composed of 10.0 g of KCl in 100 g of water is 4.5°C. Calculate the van't Hoff factor, \(i\), for this solution.

If \[ \mathbf{I} = \begin{bmatrix} 1 & 0 & 0 \\ 0 & 1 & 0 \\ 0 & 0 & 1 \end{bmatrix}, \quad B = \begin{bmatrix} \cos \theta & -\sin \theta \\ \sin \theta & \cos \theta \end{bmatrix} \] then \( B \) is equal to: