List of top Questions asked in NEET (UG)

What is the entropy change (in $JK^1\, mol^1$) when one mole of ice is converted into water at $0^{\circ}C$ ?(The enthalpy change for the conversion of ice to liquid water is $6.0 \, kJ \, mol^{-1}$ at $0^{\circ}C$)

A monkey of mass $20\, kg$ is holding a vertical rope. The rope will not break when a mass of $25\, kg$ is suspended from it but will break if the mass exceeds $25\, kg.$ What is the maximum acceleration with which the monkey can climb up along the rope ? $(g = 10\, m/s^2)$

Consider a compound slab consisting of two different materials having equal thicknesses and thermal conductivities $K$ and $2\, K,$ respectively. The equivalent thermal conductivity of the slab is

Differentiation of shoot is controlled by:

Plants deficient of element zinc, show its effect on the biosynthesis of plant growth hormone:

Sycon belongs to a group of animals, which are best described as

Gray spots of oat are caused by deficiency of

Which one of the following sequences was proposed by Darwin and Wallace for organic evolution:

Nicotiana sylvestris flowers only during long days and N. tabacum flowers only during short days. If raised in the laboratory under different photoperiods, they can be induced to flower at the same time and can be cross-fertilized to produce self-fertile offspring. What is the best reason for considering N. sylvestris and N. tabacum to be separate species:

Species are considered as

The correct order of ionic radii of $Y ^{3+}, La ^{3+}$ $Eu ^{3+}$, and $Lu ^{3+}$ is : - Atomic nos. $Y =39,\, La =57,\, Eu =63,\, Lu =71$.

The molar heat capacity of water at constant pressure, $C$, is $75\, JK ^{-1}\, mol ^{-1}$. When $1.0\, KJ$ of heat is supplied to $100\, g$ of water which is free to expand, the increase in temperature of water is :

Solar energy is mainly caused due to

The method of zone refining of metals is based on the principle of :

What is true about T-lymphocytes in mammals:

Stomata of CAM plants

A nuclear reaction is given by,
 _ZX^A → _Z+1Y^A +_–1e⁰+\(\bar v\) represents 

A convex lens is dipped in a liquid whose refractive index is equal to the refractive index of the lens. Then its focal length will

Boron in green plants assists in

In this reaction, $CH _{3} CHO + HCN \rightarrow CH _{3} CH ( OH ) CN$ $\stackrel{\text { H.OH }}{\longrightarrow} CH _{3} CH ( OH ) COOH$ an asymmetric centre is generated. The acid obtained would be

Which element is located at the centre of the porphyrin ring in chlorophyll ?

In which one of the following do the two names refer to one and the same thing ?

Test tube baby means a baby born when