List of top Chemistry Questions asked in NEET (UG)

The polymer that is used as a substitute for wool in making commercial fibres is :

Identify the incorrect statement related to ${PCl_5}$ from the following:

Among the following, the narrow spectrum antibiotic is :

Conjugate base for Bronsted acids $H_2O$ and $HF$ are:

The most stable carbocation, among the following is :-

In water saturated air, the mole fraction of water vapour is $0.02$. If the total pressure of the saturated air is $1.2\, atm$, the partial pressure of dry air is :

When neutral or faintly alkaline KMnO4 is treated with potassium iodide, iodide ion is converted into 'X'. 'X' is -

Orbital having 3 angular nodes and 3 total nodes is :-

Reversible expansion of an ideal gas under isothermal and adiabatic conditions are as shown in the figure. AB $\rightarrow$ Isothermal expansion AC $\rightarrow$ Adiabatic expansion Which of the following options is not correct ?

The biodegradable polymer is

The molar solubility of CaF$_2$ (K$_{sp}$ = 5.3 × 10$^{-11}$) in 0.1 M solution of NaF will be

A compound is formed by cation C and anion A. The anions form hexagonal close packed (hep) lattice and the cations occupy 75% of octahedral voids. The formula of the compound is :

The pH of 0.01 M NaOH (aq) solution will be

The non-essential amino acid among the following is:

The artificial sweetner stable at cooking temperature and does not provide calories is :

The alkane that gives only one mono-chloro product on chlorination with $Cl_2$ in presence of diffused sunlight is :

Polyblend, a fine powder of recycled modified plastic, has proved to be a good material for:

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$^{-1}$

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)

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 :

In which case change in entropy is negative ?

The number of sigma ($\sigma$)and pi ($\pi$) bonds in pent-2-en-4-yne is :

The correct structure of tribromooctaoxide is

Which one is malachite from the following ?

Aluminium chloride in acidified aqueous solution forms a complex $'A'$, in which hybridisation state of $Al$ is $'B'$. What are $'A'$ and $'B'$, respectively ?