List of top Questions asked in NEET (UG)- 2018

A metallic rod of mass per unit length $0.5 \, kg \, m^{-1}$ is lying horizontally on a smooth inclined plane which makes an angle of $30^{\circ}$ with the horizontal. The rod is not allowed to slide down by flowing a current through it when a magnetic field of induction $0.25 \,T$ is acting on it in the vertical direction. The current flowing in the rod to keep it stationary is
A sample of $0.1\,g$ of water at $100^{\circ}C $ and normal pressure $(1.013 \times 10^5 \, Nm^{ -2})$ requires $54\,cal$ of heat energy to convert to steam at $100^{\circ}C $. If the volume of the steam produced is $167.1\, cc$, the change in internal energy of the sample, is
A mixture of $2.3 \,g$ formic acid and $4.5 \,g$ oxalic acid is treated with cone. $H_2SO_4$. The evolved gaseous mixture is passed through $KOH$ pellets. Weight (in $g$ ) of the remaining product at $STP$ will be
The contraceptive "SAHELI"
After karyogamy followed by meiosis, spores are produced exogenously in
A $100.0\, mL$ dilute solution of $Ag ^{+}$is electrolysed for $15.0$ minutes with a current of $1.25 \,mA$ and the silver is removed completely. What was the initial $\left[ Ag ^{+}\right]$?
The type of isomerism shown by the complex $[CoCl_2(en)_2]$ is
An inductor $20\, mH$, a capacitor $100\, \mu F$ and a resistor $50 \, \Omega$ are connected in series across a source of emf, $V\, = \,10 \,sin\, 314\, t$. The power loss in the circuit is
Calcium is important in skeletal muscle contraction because it
In a growing population of a country,
Nissl bodies are mainly composed of
The bond dissociation energies of $X_2 , Y_2$ and $XY $ are in the ratio of $1 : 0.5 :1. \Delta H$ for the formation of $XY$ is - $200\, kJ\, mol^{-1}$. The bond dissociation energy of $X_2$ will be
The correct order of steps in Polymerase Chain Reaction $(PCR)$ is
The magnetic potential energy stored in a certain inductor is $25 \,mJ,$ when the current in the inductor is $60\, mA$ This inductor is of inductance
Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the other ?
A bar AB of weight W rests like a ladder with upper end A against a smooth vertical wall and the lower end B on a rough horizontal plane. If the bar is just on the point of sliding, then the reaction at A is equal to (given that $\mu$ is coefficient of friction) :
For a radioactive material, half-life is $10$ minutes. If initially there are $600$ number of nuclei, the time taken (in minutes) for. the disintegration of $450$ nuclei is
At what temperature will the rms speed of oxygen molecules become just sufficient for escaping from the Earth�s atmosphere ? (Given: Mass of oxygen molecule $(m) = 2.76 \times 10^{-26} kg $ Boltzmann�s constant $k_B = 1.38 \times 10^{-23} J \, K^{-1}$)
The efficiency of an ideal heat engine working between the freezing point and boiling point of water, is
Which of the following oxides is most acidic in nature ?
Which of the following carbocations is expected to be most stable ?
Which of the following flower only once in its life-time ?
The refractive index of the material of a prism is √2 and the angle of the prism is 30°. One of the two refracting surfaces of the prism is made a mirror inwards, by silver coating. A beam of monochromatic light entering the prism from the other face will retrace its path (after reflection from the silvered surface) if its angle of incidence on the prism is
A carbon resistor of (47 ± 4.7) kΩ is to be marked with rings of different colours for its identification. The colour code sequence will be
A pendulum is hung from the roof of a sufficiently high building and is moving freely to and fro like a simple harmonic oscillator. The acceleration of the bob of the pendulum is 20 m/s2 at a distance of 5 m from the mean position. The time period of oscillation is