List of top Questions asked in NEET (UG)

The value of Planck's constant is 6.63 × 10-34 Js. The speed of light is 3 x 1017 nm s-1. Which value is closest to the wavelength in nanometer of a quantum of light with frequency of 6 x 1015 s-1?
What is the activation energy for a reaction if its rate doubles when the temperature is raised from 20°C to 35°C ? (R = 8.314 J mol-1 K-1)
A hydrogen gas electrode is made by dipping platinum wire in a solution of HCl of pH = 10 and by passing hydrogen gas around the platinum wire at one atm pressure. The oxidation potential of electrode would be
A fluid is in streamline flow across a horizontal pipe of variable area of cross section. For this which of the following statements is correct?
One coolie takes 1 minute to raise a suitcase through a height of 2 m but the second coolie takes 30 s to raise the same suitcase to the same height. The powers of two coolies are in the ratio
For photoelectric emission from certain metal the cutoff frequency is v. If radiation of frequency 2v impinges on the metal plate, the maximum possible velocity of the emitted electron will be (m is the electron mass) :
Pigment containing membranous extensions in some cyanobacteria are
Which of the following is paramagnetic ?
Satellite RNAs are present in some
Among flowers of Calotropis, tulip, Sesbania, Asparagus, Colchicum, sweet pea, Petunia, Indigofera, mustard, soybean, tobacco and groundnut, how many plants have corolla with valvate aestivation?
A sedentary sea anemone gets attached to the shell lining of hermit crab. The association is :
A major site for synthesis of lipids is
Global warming can be controlled by :
Some meta-directing substituents in aromatic substitution are given. Which one is most deactivating?
Syngamy can occur outside the body of the organism in
The term 'glycocalyx' is used for :
Which one of the following is not correct as regards the harmful effects of particulate matter of the size 2.5 micro meters or less ?
Kyoto Protocol was endorsed at
The plant body is thalloid in
Megaspores are produced from the megaspore mother cells after
Nylon is an example of :
On the basis of thermochemical equations (a), (b) and (c), find out which of the algebric relationships given in options (i) to (iv) is correct. (1) $ {C (graphite) + O_2(g) -> CO_2(g); \Delta_rH = x \, kJ \, mol^{-1}}$ (2) $ {C(graphite) + \frac{1}{2} O_2(g) -> CO (g); \Delta_rH = y \, kJ \, mol^{-1}}$ (3) $ {CO (g) + \frac{1}{2} O_2 (g) -> CO_2 (g); }$
Ten identical cells connected in series are needed to heat a wire of length one meter and radius 'r' by $10^\circ C$ in time 't'. How many cells will be required to heat the wire of length two meter of the same radius by the same temperature in time 't' ?
A good producer of citric acid is
Megasporangium is equivalent to