List of practice Questions

The difference in angular momentum associated with the electron in the two successive orbits of hydrogen atom is
The differences between $mRNA$ and $tRNA$ are that (i) $mRNA$ has more elaborated $3$-dimensional structure due to extensive base-pairing (ii) $tRNA$ has more elaborated $3$-dimensional structure due to extensive base-pairing (iii) $tRNA$ is usually smaller than $mRNA$ (iv) $mRNA$ bears anticodon but $tRNA$ has codons,
The different steps in a nodule formation are given below. I. A mature nodule establishes a direct vascular connection with the host for exchange of nutrients. II. Root hair curls and the bacteria invade the root hair. III. Rhizobium bacteria contact a susceptile root hair, divide near it IV. The infection thread is produced carrying the bacteria and grows into the cortex of the root. V. The bacteria get modifi ed into rod-shaped bacteroids and cause inner cortical layer and pericycle to divide to form nodule. The correct sequence is
The differential equation of all non-horizontal lines in a plane is
The dielectric strength of a medium is $2\,kVmm^{-1}$ . What is the maximum potential difference that can be set up across a $50\,pm$ specimen without puncturing it.
The dielectric strength of air is $2.0\times10^6 N/C$. The largest charge that a metallic sphere of $3 \,mm$ radius can hold is
The difference between the electrode potentials of two electrodes when no current is drawn through the cell is called________.
The difference between the greatest and least value of the function, $f(x) = \sin 2x - x$ on $\left[-\frac{\pi}{2},\frac{\pi}{2}\right]$ is
The diameter of the pupil of human eye is about $2 \,mm$. Human eye is most sensitive to the wavelength of $555\, nm$. The limit of resolution of human eye is
The diaphragm, cervical cap and vaults are
The diagram given below represents a section of small intestinal mucosa. Identify $A, B$ and $C$
The dialysis of colloidal solution depends upon
The diameter of $16x^2 - 9y^2 = 144$ which is conjugate to $x = 2y $ is
The diameter of colloidal particles range from :
The detergent action of soap is due to its
The development of Periplaneta americana is
The device which produces highly coherent sources is
The diagonal of a square is changing at the rate of $0.5\, cm/ sec$. Then the rate of change of area, when the area is $400\, cm^2$, is equal to
The derivative of $\sin^{-1} x $ w.r.t $\cos^{- 1} \sqrt{1-x^{2}} $ is
The derivative of $cosec^{-1} \left(\frac{1}{2x\sqrt{1-x^{2}}}\right) w.r.t \sqrt{1-x^{2}}$ is
The derivative of $\sin \, x^3 $ w.r.t. $\cos \, x^3$ is equal to
The density of nitrogen gas prepared from air is slightly greater than that of nitrogen prepared by a chemical reaction from a compound of nitrogen due to the presence of the following in aerial nitrogen
The density of water at the surface of the ocean is $\rho$ and atmospheric pressure is $p _{0}$. If the bulk modulus of water is $K$, what is the density of ocean water at a depth where the pressure is $n p_{0}$ ?
The depression of freezing point is directly proportional to
The derivative of an even function is always