List of top Questions asked in NEET (UG)

A radio isotope 'X' with a half life 1.4 × 109 years decays to 'Y' which is stable. A sample of the rock from a cave was found to contain 'X' and 'Y' in the ratio 1:7. The age of the rock is:
A transformer having efficiency of 90% is working on 200 V and 3 kW power supply. If the current in the secondary coil is 6 A, the voltage across the secondary coil and the current in the primary coil respectively are:
When the energy of the incident radiation is increased by 20%, the kinetic energy of the photoelectrons emitted from a metal surface increased from 0.5 eV to 0.8 eV. The work function of the metal is
Which one of the following is an example of a thermosetting polymer?
Copper of fixed volume 'V' is drawn into wire of length 'l'. When this wire is subjected to a constant force 'F', the extension produced in the wire is 'Δl'. Which of the following graphs is a straight line?
Following figures show the arrangement of bar magnets in different configurations. Each magnet has magnetic dipole moment \(\overrightarrow{m}\). Which configuration has highest net magnètic dipole moment?
figures show the arrangement of bar magnets in different configurations
The given graph represents V – I characteristic for a semiconductor device
graph represents V – I characteristic for a semiconductor device
Which of the following statement is correct?
What products are formed when the following compound is treated with Br2 in the presence of FeBr3?
What products are formed when the following compound is treated with Br2
Which property of colloids isnot dependent on the charge on colloidal particles?
For a given exothermic reaction, Kp and K'P are the equilibrium constants at temperatures T1 and T2, respectively. Assuming that heat of reaction is constant in temperature range between T1 and T2, it is readily observed that:
For the reversible reaction :
\(N_2(g) + 3H_2(g) ⇋ 2NH_3(g) + \text {Heat}\)
The equilibrium shifts in forward direction :
Reason of lanthanoid contraction is:
Which of the following statements is correct for the spontaneous adsorption of a gas?
Which of the following hormones is produced underthe condition of stress which stimulates glycogenolysis in the liver of human beings?
Which of the following will not be soluble in sodiumhydrogen carbonate?
Which one is most reactive towards Nucleophilic addition reaction?
Which of the following organic compounds has same hybridization as its combustion product CO2 ?
\(Be^{2+}\) is isoelectronic with which of the following ions?
A speeding motorcyclist sees traffic jam ahead of him. He slows down to 36 km/hour. He finds that traffic has eased and a car moving ahead of him at 18 km/hour is honking at a frequency of 1392 Hz. If the speed of sound is 343 m/s, the frequency of the honk as heard by him will be :
A body of mass (4m) is lying in x-y plane at rest. It suddenly explodes into three pieces. Two pieces, each of mass (m) move perpendicular to each other with equal speeds (v). The total kinetic energy generated due to explosion is :
1.0 g of magnesium is burnt with 0.56 g O2 in a closed vessel. Which reactant is left in excess and how much? (At. wt. Mg = 24 ; O = 16)
A particle is moving such that its position coordinates (x, y) are
(2m, 3m) at time t = 0,
(6m, 7m) at time t=2s and
(13m, 14m) at time t=5s.
Average velocity vector \((\overrightarrow{V}_{av})\) from t=0 to t=5s is:
The mean free path of molecules of a gas, (radius 'r') is inversely proportional to :
Fruit colour in squash is an example of:
An example of edible underground stem is: