List of practice Questions

The principal value of $\sin^{-1} \left(\sin \frac{2\pi}{3}\right) $ is:

The principle involved in paper chromatography is

The probability density plots of $1s$ and $2s$ atomic orbitals are given in figures.

The density of dots in a region represents the probability density of finding electrons in the region. On the basis of the above diagram, which of the following statements is incorrect?

The principal functional group in the compound $BrCH_2CH(OH)CH_2COCH_2NO_2$ is

The principal gas evolved from sludge digestion tank is

The principal value of $\sin^{-1} \left( - \frac{\sqrt{3}}{2} \right)$ is :

The primary treatment of waste water involves the removal of

The primary valency of iron in $K_4[Fe(CN)_6$ is

The primary winding of a transformer has 100 turns and its secondary winding has 200 turns. The primary is connected to an A.C. supply of 120 V and the current flowing in it is 10 A. The voltage and the current in the secondary are

The prime source of taxonomic studies is

The pressure-volume work for an ideal gas can be calculated by using the expression $W = - \int\limits^{V_{f}}_{V_i} P_{ex} \,dV$. The work can also be calculated from the $PV -$ plot by using the area under the curve within the specified limits. When an ideal gas is compressed $(i)$ reversibly or $(ii)$ irreversibly from volume $V_i$ to $V_f$. Choose the correct option.

The prickly pear cactus became unusually abundant after its introduction in Australia, because it

The primary difference between the apoplast and the symplast is that the

The primary lymphoid organs are

The preserved fossil remains of Archaeopteryx show that

The pressure and density of a diatomic gas $\left(\gamma=\frac{7}{5}\right)$ change adiabatically from $\left(P, ?\right)$ to $\left(P? If $\frac{\rho'}{\rho}=32$, then $\frac{P '}{P}$ is

The pressure o f a $1 : 4$ mixture of dihydrogen and dioxygen enclosed in a vessel is one atmosphere. What would be the partial pressure of dioxygen?

The practical purpose of classification of living organisms is to

The power of a lens used to remove the myopic defect of eye is 0.66D: The far point of this eye is (nearly)

The potential energy of a particle $4(U_x)$ executing SHM is given by

The potential energy of a spring when stretched through a distance $x$ is $10\, J$. What is the amount of work done on the same spring to stretch it through an additional distance $x$ ?

The potential at a point P due to an electric dipole is $1.8 \times 10^5 \, V$. If P is at a distance of 50 cm apart from the centre O of the dipole and if CP makes an angle 60? with the positive side of the axial line of the dipole, what is the moment of the dipole?

The potential difference between the points $A$ and $B$ in the adjoining circuit diagram will be

The position of an object moving along $x$-axis is given by $x = a + bt^2$, where $a = 8.5 \,m$ and $b = 2.5\, m \,s^{-2}$ and $t$ is measured in seconds. The instantaneous velocity of the object at $t = 2\,s$ is

The position of the centre of mass of a cube of uniform mass density will be at