List of top Questions asked in NEET (UG)

The fruit fly Drosophila melanogaster was found to be very suitable for experimental verification of chromosomal theory of inheritance by Morgan and his colleagues because :

The genotype of a plant showing the dominant phenotype can be determined by

Zener diode is used for

Transport of food material in higher plants takes place through

An example of endomycorrhiza is

The second maturation division of the mammalian ovum occurs

The dependence of acceleration due to gravity $g$ on the distance $r$ from the centre of the earth assumed to be a sphere of radius $R$ of uniform density is as shown in the figure. The correct figure is

Standard entropies of $X_2 ,Y_2$ and $XY_3$ are $60 , 40 $ and $ 50 \, JK^{-1} mol^{-1}$ respectively. For the reaction $ { \frac{1}{2} X_2 + \frac{3}{2}Y_2 <=> XY_3, \Delta H = -30 kJ}$ to be at equilibrium, the temperature should be

During the kinetic study of the reaction, $2A + B\longrightarrow C + D$, following results were obtained . Based on the above data which one of the following is correct?

Run	$A/mol\,L^{-1}$	$B/mol\,L^{-1}$	Initial rate of formation of $D/mol\,L^{-1}\,min^{-1}$
I	0.1	0.1	$6.0 \times 10^{-3}$
II	0.3	0.2	$7.2 \times 10^{-2}$
III	0.3	0.4	$2.88 \times 10^{-1}$
IV	0.4	0.1	$2.40 \times 10^{-2}$

The mass of a $^7_3$Li nucleus is $0.042\, u$ less than the sum of the masses of all its nucleons. The binding energy per nucleon of $^7_3$Li nucleus is nearly

A cylindrical metallic rod in thermal contact with two reservoirs of heat at its two ends conducts an amount of heat $Q$ in time $t$. The metallic rod is melted and the material is formed into a rod of half the radius of the original rod. What is the amount of heat conducted by the new rod when placed in thermal contact with the two reservoirs in time $t$ ?

The rate of the reaction $ {2NO + Cl_2 -> 2NOCl}$ is given by the rate equation rate = $ { k[NO]^2[Cl_2]}$ . The value of the rate constant can be increased by -

Identify the components labelled A, B, C and D in the diagram below from the list (i) to (viii) given along with Components: (i) Cristae of mitochondria (ii) Inner membrane of mitochondria (iii) Cytoplasm (iv) Smooth endoplasmic reticulum (v) Rough endoplasmic reticulum (vi) Mitochondrial matrix (vii) Cell vacuole (viii) Nucleus The correct components are:

	A	B	C	D
(1)	(v)	(iv)	(viii)	(iii)
(2)	(i)	(iv)	(viii)	(vi)
(3)	(vi)	(v)	(iv)	(vii)
(4)	(v)	(i)	(iii)	(ii)

Select the correct statement from the following

An engine pumps water through a hose pipe. Water passes through the pipe and leaves it with a velocity of $2 \,m/s$. The mass per unit length of water in the pipe is $100 \,kg/m$. What is the power of the engine?

The ionization energy of the electron in the hydrogen atom in its ground state is $13.6\, eV.$ The atoms are excited to higher energy levels to emit radiations of $6$ wavelengths. Maximum wavelength of emitted radiation corresponds to the transition between

A bus is moving with a speed of $ 10 \,ms^{-1} $ on a straight road. A scooterist wishes to overtake the bus in $ 100 \,s $ . If the bus is at a distance of $ 1 \,km $ from the scooterist with what speed should the scooterist chase the bus ?

A conducting circular loop is placed in a uniform magnetic field $0.04\, T$ with its plane perpendicular to the magnetic field. The radius of the loop starts shrinking at $2\, mm/s.$ The induced emf in the loop when the radius is $2\, cm$ is

The two ends of a rod of length $L$ and a uniform cross-sectional area $A$ are kept at two temperatures $T_1$ and $T_2 (T_1 > T_2).$ The rate of heat transfer, through the rod in a steady state is given by :

A $0.0020\, M$ aqueous solution of an ionic compound $Co \left( NH _{3}\right)_{5}\left( NO _{2}\right) Cl$ freezes at $-0.00732^{\circ} C$. Number of moles of ions which 1 mole of ionic compound produces on being dissolved in water will be : $\left( k _{ f }=1.86^{\circ} C / m \right)-$

The segment of DNA which acts as the instrumental manual for the synthesis of the protein is

The dissociation constants for acetic acid and $HCN$ at $25^{\circ} C$ are $1.5 \times 10^{-5}$ and $4.5 \times 10^{-10}$ respectively. The equilibrium constant for the equilibrium $CN ^{-}+ CH _{3} COOH \rightleftharpoons HCN + CH _{3} COO ^{-}$ would be :

In the reaction $BrO _{3}^{-}( aq )+5 Br ^{-}( aq )+6 H ^{+} \rightarrow 3 Br _{2}(l)+3 H _{2} O (l)$ The rate of appearance of bromine $\left( Br _{2}\right)$ is related to rate of disappearance of bromide ions as following

For the reaction, $N _{2}+3 H _{2} \rightarrow 2 NH _{3}$, If $\frac{ d \left[ NH _{3}\right]}{ dt }=2 \times 10^{-4}\, mol\, L ^{-1} s ^{-1}$, The value of $\frac{- d \left[ H _{2}\right]}{ dt }$ would be -

The electric field part of an electromagnetic wave in a medium is represented by: $E _{ x }=0$ $E _{ y }=2.5 \frac{ N }{ C } \cos \left[\left(2 \pi \times 10^{6} \frac{ rad }{ m }\right) t -\left(\pi \times 10^{-2} \frac{ rad }{ s }\right) x \right]$ $E _{ z }=0 .$ The wave is :