List of top Questions asked in NEET (UG)

All the components of the nodal tissue are autoexcitable. Why does the SA node act as the normal pacemakar?

Variations caused by mutation, as proposed by Hugo de Vries, are:

Both, autogamy and geitonogamy are prevented in

The distance covered by a particle undergoing SHM in one time period is (amplitude = A) :

A double convex lens has focal length 25 cm. The radius of curvature of one of the surfaces is double of the other. Find the radii if the refractive index of the material of the lens is 1.5 :

A bar magnet placed in a uniform magnetic field making an angle $\theta$ with the field experiences a torque. If the angle made by the magnet with the field is doubled, the torque experienced by the magnet increases by $41.4\%$. The initial angle made by the magnet with the magnetic field is

For an ideal solution, the correct option is :

A gas at 350 K and 15 bar has molar volume 20 percent smaller than that for an ideal gas under the same conditions. The correct option about the gas and its compressibility factor (Z) is :

Two point charges $A$ and $B$, having charges $+ Q$ and $- Q$ respectively, are placed at certain distance apart and force acting between them is $F$. If $25\%$ charge of $A$ is transferred to $B$. then force between the charges become

The mixture that forms maximum boiling azeotrope is :

Which of the following statements is correct?

The ciliated epithelial cells are required to move particles or mucus in a specific direction. In humans, these cells are mainly present in

The reading of an ideal voltmeter in the circuit shown is :

Which of the following contraceptive methods do involve a role of hormone ?

The density of 2 M aqueous solution of NaOH is 1.28 g/cm$^3$. The molality of the solution is [Given that molecular mass of NaOH = 40 g mol$^{-1}$]

The method used to remove temporary hardness of water is:

A copper rod of $88 \,cm$ and an aluminium rod of unknown length have their increase in length independent of increase in temperature. The length of aluminium rod is $(a_{C_{u}}=1.7 \times 10^{-5}\,K^{-1}$ and $\left.a_{A_{l}}=2.2 \times 10^{-5} K^{-1}\right)$

The polymer that is used as a substitute for wool in making commercial fibres is :

Two parallel infinite line charges with linear charge densities $+\lambda \, C/m$ and $-\lambda \, C/m$ are placed at a distance of 2R in free space. What is the electric field mid-way between the two line charges ?

Choose the right one among the statements given below

In a u-tube as shown in figure, water and oil are in the left side and right side of the tube respectively. The heights from the bottom for water and oil columns are 15 cm and 20 cm respectively. The density of the oil is :- [take \(\rho_{water}\) = 1000 kg/m\(^3\)]

Which of the following sexually transmitted diseases is not completely curable ?

A 800 turn coil of effective area 0.05 $m^2$ is kept perpendicular to a magnetic field $5\times 10^{-5}$ T. When the plane of the coil is rotated by $90^\circ$ around any of its coplanar axis in 0.1 s, the emf induced in the coil will be

A circuit when connected to an $AC$ source of $12\, V$ gives a current of $0.2\, A$. The same circuit when connected to a $DC$ source of $12\, V$, gives a current of $0.4 \,A$. The circuit is

Crossing over takes place between which chromatids and in which stage of the cell cycle ?