List of top Questions asked in NEET (UG)

Two particles are oscillating along two close parallel straight lines side by side, with the same frequency and amplitudes. They pass each other, moving in opposite directions when their displacement is half of the amplitude. The mean positions of the two particles lie on a straight line perpendicular to the paths of the two particles. The phase difference is

A galvanometer of resistance, $G$ , is shunted by a resistance $S$ ohm. To keep the main current in the circuit unchanged, the resistance to be put in series with the galvanometer is

A gaseous mixture was prepared by taking equal moles of $CO$ and $N_2.$ If the total pressure of the mixture was found $1$ atmosphere, the partial pressure of the nitrogen $(N_2)$ in the mixture is

A solution contains ${Fe^{2+}, Fe^{3+}}$ and $I^-$ ions. This solution was treated with iodine at ${ 35^{\circ} C. E^{\circ}}$ for ${Fe^{3+} /Fe^{2+}}$ is $+0.77 \, V$ and $E^{\circ}$ for $I_2/2I^- = 0.536 \, V.$ The favourable redox reaction is-

A thin prism of angle $15^{\circ}$ made of glass of refractive index ($ {\mu}_1 = 1.5 $ is combined with another prism of glass of refractive index $ {\mu}_2 = 1.75$. The combination of the prisms produces dispersion without deviation. The angle of the second prism should be

Two waves are represented by the equations $y_1 = a \sin(\omega t + kx + 0.57) m $ and $y_2 = a \cos(\omega t + kx) m,$ where $x$ is in meter and $t$ in sec. The phase difference between them is

A Zener diode, having breakdown voltage equal to $15\,V$, is used in a voltage regulator circuit shown in figure. The current through the diode is

Three charges, each $+q$, are placed a at the corners of an isosceles triangle $ABC$ of sides $BC$ and $AC$, $2a$. $D$ and $E$ are the mid points of $BC$ and $CA$. The work done in taking a charge $Q$ from $D$ to $E$ is

A missile is fired for maximum range with an initial velocity of $20\, m/s$. If $g = 10 \,m/s^2$, the range of the missile is

Which one of the following is not a part of a renal pyramid?

The half life of a radioactive isotope $X$ is $50$ years. It decays to another element $Y$ which is stable. The two elements $X$ and $Y$ were found to be in the ratio of $1 : 15$ in a sample of a given rock. The age of the rock was estimated to be

A thermocouple of negligible resistance produces an e.m.f. of $ 40\, \mu V/^{\circ}C$ in the linear range of temperature. A galvanometer of resistance $10$ ohm whose sensitivity is $1 \, \mu A/division$, is employed with the thermocouple. The smallest value of temperature difference that can be detected by the system will be

If power dissipated in the $9\, \Omega$ resistor in the circuit shown is $36$ watt, the potential difference across the $2\, \Omega$ resistor is

Ethanol is commercially produced through a particular species of

Mutations can be induced with

What happens during fertilization in humans after many sperms reach close to the ovum

The correct order of increasing bond length of $ C - H, C - O, C - C$ and $ C = C $ is

Enthalpy change for the reaction, $4 H _{( g )} \rightarrow 2 H _{2( g )}$ is $-869.6\, kJ$ The dissociation energy of $H - H$ bond is

The pairs of species of oxygen and their magnetic behaviours are noted below. Which of the following presents the correct description ?

Which one of the following is employed as Antihistamine?

Acidified $K_2Cr_2O_7 $ solution turns green when $Na_2SO_3 $ is added to it. This is due to the formation of

A boy standing at the top of a tower of $20\,m$ height drops a stone. Assuming $g = 10\, ms^{-2},$ the velocity with which it hits the ground is

Select the correct statement with respect to disease and immunization :

Which one of the following acts as a physiological barrier to the entry of microorganisms in human body ?