List of top Questions asked in NEET (UG)- 2019

In which case change in entropy is negative? (1)(2) (3 (4)

The number of \(\sigma \)and \(\pi\) bonds in pent-2-en-4-yne is: 

Which mixture of the solutions will lead to the formation of negatively charged colloidal [Agl]I- Sol.? (

Which of the following is incorrect statement?

The major product of the following reaction is:

4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is :

An object flying in air with velocity $\left(20\hat{i} + 25\hat{j} - 12\hat{k}\right)$ suddenly breaks in two pieces whose masses are in the ratio $1 : 5$. The smaller mass flies off with a velocity $\left(100\hat{i} + 35\hat{j} + 8\hat{k}\right)$. The velocity of the larger piece will be :

A particle starting from rest, moves in a circle of radius 'r'. It attains a velocity of V0 m/s in the $n^{th}$ round. Its angular acceleration will be :-

A truck is stationary and has a bob suspended by a light string, in a frame attached to the truck. The truck, suddenly moves to the right with an acceleration of a. The pendulum will tilt :-

A mass falls from a height 'h' and its time of fall $'l'$ is recorded in terms of time period T of a simple pendulum. On the surface of earth it is found that I = 2T. The entire set up is taken on the surface of another planet whose mass is half of that of earth and radius the same. Same experiment is repeated and corresponding times noted as t' and T'.

$\alpha$-particle consists of:

Conversion of glucose to glucose-6-phosphate, the first irreversible reaction of glycolysis, is catalyzed by:

The correct order of the basic strength of methyl substituted amines in aqueous solution is :

Match Column - I with Column - II.

Choose the correct answer from the options given below :

Assuming that the gravitational potential energy of an object at infinity is zero, the change in potential energy (final - initial) of an object of mass m, when taken to a height h from the surface of earth (of radius R), is given by,

The volume occupied by 1.8 g of water vapour at 374 °C and 1 bar pressure will be :- [Use R = 0.083 bar L $K^{-1}mol^{-1}$]

The circuit diagram shown here corresponds to the logic gate,

Which scientist experimentally proved that DNA is the sole genetic material in bacteriophage ?

An object kept in a large room having air temperature of 25°C takes 12 minutes to cool from 80° to 70°C. The time taken to cool for the same object from 70°C to 60°C would be nearly :

Among the following, the one that is not a green house gas is :

The oxidation state of Cr in CrO₆ is :

Expressed Sequence Tags (ESTs) refers to

Select the correct option.

In the dicot root the vascular cambium originates from :-

Purines found both in DNA and RNA are ;