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

Thiobacillus is a group of bacteria helpful in carrying out:

It takes very long time for pineapple plante to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield?

What is the direction of movement of sugars in phloem?

Which of the following statements is incorrect?

Select the correct group of biocontrol agents.

Which of the following pair of organelles does not contain DNA?

What is the fate of the male gametes discharged in the synergid?

Pinus seed cannot germinate and establish without fungal association. This is because

In which of the following processes, heat is neither absorbed nor released by a system?

At a point A on the earth's surface the angle of dip, \(\delta=+25°\). At a point B on the earth's surface the angle of dip, \(\delta=-25°\). We can interpret that: 

Increase in temperature of a gas filled in a container would lead to:

Which of the following acts as a circuit protection device?

A cylindrical conductor of radius R is carrying a constant current. The plot of the magnitude of the magnetic field, B with the distance, d, from the centre of the conductor, is correctly represented by the figure :

A hollow metal sphere of radius R is uniformly charged. The electric field due to the sphere at a distance r from the centre :

A 800 turn coil of effective area \(0.05\ m^2\) is kept perpendicular to a magnetic field \( 5 \times 10^{-5} T.\) When the plane of the coil is rotated by \(90\degree\) around any of its coplanar axis in \(0.1 s\), the emf induced in the coil will be:

A force\( F=20+10y \)acts on a particle in \(y-\)direction where \(F\) is in newton and y in meter. Work done by this force to move the particle from \(y=0\) to \( y=1\) m is: 

The work done to raise a mass m from the surface of the earth to a height h, which is equal to the radius of the earth, is:

Two particles \(A\) and \(B\) are moving in uniform circular motion in concentric circles of radii \(ra\) and \(rb\) with speed \(\upsilon_A\)and \(\upsilon_B\)respectively. Their time period of rotation is the same. The ratio of angular speed of \(A\) to that of \(B \)will be: 

The radius of circle, the period of revolution, initial position and sense of revolution are indicated in the fig.

y- projection of the radius vector of rotating particle P is:

The unit of thermal conductivity is:

Ionized hydrogen atoms and a-particles with same momenta enters perpendicular to a constant magnetic field, B. The ratio of their radii of their paths \( r_H: r_\alpha\) will be:

Two point charges A and B, having charges. +Q and -Q respectively, are placed at certain distance apart and force acting between them is F. If 25% charge of A is transferred to B, then force between the charges becomes:

Match LIST I with LIST II

LIST I		LIST II
A	Pure nitrogen	I	Chlorine
B	Haber process	II	Sulphuric acid
C	Contact process	III	Ammonia
D	Deacon's process	IV	Sodium azide or Barium azide

Which of the following is the correct option?

The most suitable reagent for the following conversion, is:

The structure of intermediate A in the following reaction, is;