List of top Chemistry Questions asked in NEET (UG)

A 0.1 molal aqueous solution of a weak acid is 30% ionized. If $K_f$ for water is $ 1.86^{\circ} C/m$, the freezing point of the solution will be -

The Lassaigne's extract is boiled with conc. $HNO_3$ while testing for halogens. By doing so it

A bubble of air is underwater at temperature $15^{\circ}C$ and the pressure $1.5 \,bar$. If the bubble rises to the surface where the temperature is $25^{\circ}C$ and the pressure is $1.0\, bar$, what will happen to the volume of the bubble?

The unit of rate constant for a zero order reaction is -

For the four successive transition elements $(Cr, Mn, Fe$ and $Co)$ , the stability of $+ 2$ oxidation state will be there in which of the following order? (At. no. $Cr = 24, Mn = 25, Fe = 26,Co = 27$ )

The Van't Hoff factor $I$ for a compound which undergoes dissociation in one solvent and association in other solvent is respectively :

Which of the following elements is present as the impurity to the maximum extent in the pig iron?

According to the Bohr Theory, which of the following transitions in the hydrogen atom will give rise to the least energetic photon?

A solid compound $XY$ has $NaCl$ structure. If the radius of the cation is $100\, pm$, the radius of the anion $(Y^-)$ will be -

Which one of the following is present as an active ingredient in bleaching powder for bleaching action?

The complex, $[Pt(Py)(NH_3)Br\,Cl]$ will have how many geometrical isomers?

Clemmensen reduction of a ketone is carried out in the presence of which of the following?

What is the value of electron gain enthalpy of $Na^+$ if $IE_1$ of $Na = 5.1 \, eV$?

A gaseous mixture was prepared by taking equal moles of $CO$ and $N_2.$ If the total pressure of the mixture was found $1$ atmosphere, the partial pressure of the nitrogen $(N_2)$ in the mixture is

A solution contains ${Fe^{2+}, Fe^{3+}}$ and $I^-$ ions. This solution was treated with iodine at ${ 35^{\circ} C. E^{\circ}}$ for ${Fe^{3+} /Fe^{2+}}$ is $+0.77 \, V$ and $E^{\circ}$ for $I_2/2I^- = 0.536 \, V.$ The favourable redox reaction is-

The pairs of species of oxygen and their magnetic behaviours are noted below. Which of the following presents the correct description ?

Which one of the following is employed as Antihistamine?

Acidified $K_2Cr_2O_7 $ solution turns green when $Na_2SO_3 $ is added to it. This is due to the formation of

Which one of the following statements is not true regarding $(+)$ lactose?

Which of the following is not a fat soluble vitamin ?

Which of the following carbonyls will have the strongest C-O bond ?

The rate of the reaction $ {2 N_2 O_5 -> 4 NO_2 + O_2}$ can be written in three ways: $\frac{-d [N_2 O_5]}{dt} = k [N_2 O_5]$ $\frac{d[NO_2]}{dt} = k' [N_2 O_5]$ $\frac{d[O_2]}{dt} = k" [N_2 O_5]$ The relationship between k and k' and between k and k'' are-

Consider the following processes : $\Delta H (kJ / mol)$ ½ A → B + 150 3B → 2C + D -125 E + A → 2D +350 For B + D → E + 2C, ΔH will be-

Which of the following is correct option for free expansion of an ideal gas under adiabatic condition ?

Which of the following has the minimum bond length?