List of top Questions asked in NEET (UG)- 2014

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 :
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)
The mean free path of molecules of a gas, (radius 'r') is inversely proportional to :
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 $ \Delta l $. Which of the following graphs is a straight line?
Person with blood group AB is considered as universal recipient because he has
Pollen tablets are available in the market for
The organization which publishes the Red list of species is
Equal masses of $H_2, O_2$ and methane have been taken in a container of volume V at temperature $27^\circ$C in identical conditions. The ratio of the volumes of gases ${H_2 : O_2 :CH_4}$ would be
Function of filiform apparatus is to
When 22.4 L of $H_{2(g)}$ is mixed with 11.2 L of $Cl_{2(g)}$, each at STP, the moles of $HCl_{(g)}$ formed is equal to
A few normal seedlings of tomato were kept in a dark room. After a few days they were found i to have become white-coloured like albinos. Which of the following terms will you use to describe them?
Deficiency symptoms of nitrogen and potassium are visible first in
The measured value of length of a simple pendulum is $20 \,cm$ known with $2 \,mm$ accuracy. The time for $50$ oscillations was measured to be $40 \,s$ with Is resolution. Calculate, the percentage accuracy in the determination of acceleration due to gravity $g$ from the above measurements.
Identity Z in the sequence of reactions, $CH_3 CH_2 CH=CH_2 \xrightarrow{HBr/H_2 O_2}Y \xrightarrow{C_2H_5 ON_a}Z$
The angle of a prism is A. One of its refracting surfaces is silvered. Light rays falling at an angle of incidence 2A on the first surface returns back through the same path after suffering reflection at the silvered surface. The refractive index p, of the prism is
Tracheids differ from other tracheary elements in
In vitro clonal propagation in plants is characterized by
For a given exothermic reaction, $K_p$ and $K_p'$ are the equilibrium constants at temperatures $T_1$ and $T_2$, respectively. Assuming that heat of reaction is constant in temperature range between $T_1$ and $T_2$, it is readily observed that :-
In the Kjeldahl's method for estimation of nitrogen present in a soil sample, ammonia evolved from $0.75\, g$ of sample neutralized $10\, mL$ of ${1 \, M \, H_2SO_4}$. The percentage of nitrogen in the soil is :
$Be^{2+}$ is isoelectronic with which of the following ions?
A certain number of spherical drops of a liquid of radius $r$ coalesce to form a single drop of radius $R$ and volume $V$. If $T$ is the surface tension of the liquid, then
The pair of compounds that can exist together is
The main function of mammalian corpus luteum is to produce
The barrier potential of a $p-n$ junction depends on (1) type of semiconductor material (2) amount of doping (3) temperature Which one of the following is correct?
Anoxygenic photosynthesis is characteristic of