List of top Chemistry Questions asked in NEET (UG)

The correct order of the $O - O$ bond length in $O_2,H_2 O_2 $ and $O_3 $ is
If enthalpies of formation for $C _{2} H _{4}(g), CO _{2( g )}$ and $H _{2} O _{(1)}$ at $25^{\circ} C$ and $1\, atm$ pressure are $52,-394$ and - $286\, kJ / mol$ respectively, then enthalpy of combustion of $C _{2} H _{4}( g )$ will be
The percentage weight of Zn in white vitriol $[ZnSO_4 . 7H_2O]$ is approximately equal to $(at. \, mass\, of \, Zn= 65, S=32, 0=16 \, and \, H= 1)$
Stainless steel contains iron and
The loss of electron is termed as
The number of geometrical isomers for [Pt(NH3)2Cl2] is
The oxidation number of chromium in potassium dichromate is
The number of moles of oxygen in 1 L of air containing 21% oxygen by volume, under standard conditions, is
The radius of hydrogen atom in the ground state is 0.53 $\mathring{A}.$ The radius of $Li^{2+}$ ion (at. no. = 3) in a similar state is
Which of the following is a redox reaction ?
If a beam of light is passed through true solution, it is
A reaction occurs spontaneously if :
About 20 km above the earth, there is an ozone layer. Which one of the following statements about ozone and ozone layer is true?
Which of the following protein destroy the antigen when it enters in body cell?
500 mL of nitrogen at $27^\circ C$ is cooled to $-5^\circ C$ at the same pressure. The new volume becomes

The oxide which cannot act as a reducing agent is

The $\alpha$-D-glucose and $\beta$-D-glucose differ from each other due to difference in carbon atom with respect to its
Phenol, p-Methylphenol, m-Nitrophenol and p-Nitrophenol follows order of increasing acidic strength
Sodium is made by the electrolysis of a molten mixture of about 40% NaCl and 60% $CaCl_2$ because
Uncertainty in position of an electron (mass of an electron is =$9.1\times10^{-28}g)$ moving with a velocity of $3 \times 10 ^4$ cm/s accurate upto 0.001% will be (use $\frac{h}{4\pi}$ in uncertainty expression where $h = 6.626 \times 10^{-27}$ erg s)
Which of the following statements about enzymes are true?
The electronic configuration of an element is $1s^2,2s^2 2p^6,3s^2 3p^3$. What is the atomic number of the element, which is present just below the above element in the periodic table?
The figure indicates the energy level diagram of an atom and the origin of six spectral lines in emission (e.g. line no. 5 arises from the transition from level B to A). Which of the following spectral lines will occur in the absorption spectrum?
Among the lanthanides, the one obtained by synthetic method is
In which of the following reactions, there is no change in valency ?