List of top Questions asked in NEET (UG)

The annular and spirally thickened conducting elements generally develop in the protoxylem when the root or stem is
If $\vec{F}$ is the force acting on a particle having position vector $\vec{r}$ and $\vec{\tau}$ be the torque of this force about the origin, then
Four identical thin rods each of mass M and length $l$, form a square frame. Moment of inertia of this frame about an axis through the centre of the square and perpendicular to its plane is
An explosion blows a rock into three parts Two parts go off at right angles to each other. These two are, $1\, kg$ first part moving with a velocity of $12\, ms ^{-1}$ and $2\, kg$ second part moving with a velocity of $8\, ms ^{-1}$. If the thirds part files off with a velocity of $4\, ms ^{-1}$, its mass would be :
A wave in a string has an amplitude of $2\, cm$. The wave travels in the +ve direction of $x$ -axis with a speed of $128\, m / s$ and it is noted that 5 complete waves fit in $4\, m$ length of the string. The equation describing the wave is
A long solenoid has 500 turns. When a current of 2 ampere is passed through it, the resulting magnetic flux linked with each turn of the solenoid is $4 \times 10^{-3}$ Wb. The self-inductance of the solenoid is
The most active phagocytic white blood cells are
Quercus species are the dominant component in
Which one of the following pair of organs include only endocrine glands ?
A closed loop PQRS carrying a current is placed in a uniform magnetic field. If the magnetic forces on segments PS, SR and RQ are $F_1, F_2, $ and $ F_3$ respectively and are in the plane of the paper and along the directions shown, the force on the segment QP is
In an a.c. circuit the emf (e) and the current (i) at any instant core given respectively by \(e = E_0 sin ωt\), \(I = I_0 sin (ωt – ɸ)\). The average power in the circuit over one cycle of a.c. is.
A circular disc of radius 0.2 meter is placed in a uniform magnetic field of induction $\frac{1}{\pi}\big(\frac{Wb}{m^2}\big)$ in such a way that its axis makes an angle of 60$^{\circ}$ with $\overrightarrow{B}$ . The magnetic flux linked with the disc is
What volume of oxygen gas $(O_2)$ measured at $0^\circ C$ and 1 atm, is needed to bum completely 1L of propane gas $(C_3H_8)$ measured under the same conditions?
The blood calcium level is lowered by the deficiency of
Polysome is formed by
The energy-releasing metabolic process in which substrate is oxidised without an external electron acceptor is called
The distance travelled by a particle starting from rest and moving with an acceleration $\frac{4}{3}ms^{-2},$ in the third second is
Green chemistry means such reactions which
The dissociation equilibrium of a gas $ AB_2 $ can be represented as $2 A B_2(g) \rightleftharpoons 2 A B (g) + B_2 (g) $ The degree of dissociation is $x$ and is small compared to $1$. The expression relating the degree of dissociation (x) with equilibrium constant $K_p$ and total pressure $p$ is
About 70% of total global carbon is found in
World Summit on Sustainable Development (2002) was held in
Which of the following are not state functions? (I) q + W (II) q (III) w (IV) H-TS
Standard free energies of formation (in kj/mol) at 298 K are -237.2, -394.4 and -8.2 for $H_2O(l),CO_2(g) $ and pentane (g), respectively. The value of $E^0_{cell} $ for the pentane-oxygen fuel cell is
If uncertainty in position and momentum are equal, then uncertainty in velocity is
Dry indehiscent single-seeded fruits formed from bicarpellary syncarpous inferior ovary is