List of top Questions asked in NEET (UG)

For a reaction, activation energy E$_a$=0 and the rate constant at 200K is 1.6×10$^6$s$^{-1}$. The rate constant at 400K will be- [Given that gas constant] R= 8.314 J K$^{-1}$ mol$^{-1}$
It takes very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout, the year to increase yield ?
What would be the heart rate of a person if the cardiac output is 5 L, blood volume in the ventricles at the end of diastole is 100 mL and at the end of ventricular systole is 50 mL ?
If the rate constant for a first order reaction is k, the time(t) required for the completion of 99% of the reaction is given by :
Under isothermal condition, a gas at 300 K expands from 0.1 L to 0.25 L against a constant externalpressureof2bar Theworkdonebythe gas i s : [Given that 1Lbar= 100J)
In total internal reflection when the angle of incidence is equal to the critical angle for the pair of media in contact, what will be angle of refraction ?
A straight conductor carrying current $i$ splits into two parts as shown in the figure. The radius of the circular loop is $R$. The total magnetic field at the centre $P$ at the loop is :
In which case change in entropy is negative ?
Bicarpellary ovary with obliquely placed septum is seen in :-
Which one of the following statements regarding post-fertilization development in flowering plants is incorrect ?
The given figure shows transport of two molecules $A$ and $B$ through three different modes of facilitated diffusion. Select the correct option regarding it.
Respiratory Quotient (RQ) value of tripalmitin is -
In the dicot root the vascular cambium originates from :-
Following table summarises the comparisons between phyllodades and cladodes (cladophylls). Pick up the wrong differences and select the correct option,
Which of the following ecological pyramids is generally inverted ?
What type of pollination takes place in Vallisneria?
In pteridophytes, main plant body is a , which is into true roots, stem and leaves. Fill the blanks in above statement and select the correct option.
The number of sigma ($\sigma$)and pi ($\pi$) bonds in pent-2-en-4-yne is :
The correct structure of tribromooctaoxide is
Two similar thin $equi-convex$ lenses, of focal length $f$ each, are kept coaxially in contact with each other such that the focal length of the combination is $F_1$. When the space between the two lenses is filled with glycerin (which has the same refractive index $(p = 1.5)$ as that of glass) then the equivalent focal length is $F_2$. The ratio $F_1$ : $F_2$ will be :
How does steroid hormone influence the cellular activities?
A selectable marker is used to:
The correct order of the basic strength of methyl substituted amines in aqueous solution is :
A copper rod of $88 \,cm$ and an aluminium rod of unknown length have their increase in length independent of increase in temperature. The length of aluminium rod is $(a_{C_{u}}=1.7 \times 10^{-5}\,K^{-1}$ and $\left.a_{A_{l}}=2.2 \times 10^{-5} K^{-1}\right)$
Crossing over takes place between which chromatids and in which stage of the cell cycle ?