List of top Chemistry Questions asked in NEET (UG)

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 method used to remove temporary hardness of water is:
The mixture that forms maximum boiling azeotrope is :
The polymer that is used as a substitute for wool in making commercial fibres is :
The biodegradable polymer is
The density of 2 M aqueous solution of NaOH is 1.28 g/cm$^3$. The molality of the solution is [Given that molecular mass of NaOH = 40 g mol$^{-1}$]
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 :
Among the following, the narrow spectrum antibiotic is :
The non-essential amino acid among the following is:
The pH of 0.01 M NaOH (aq) solution will be
The oxidation state of Cr in CrO6 is :
The most stable carbocation, among the following is :-
Among the following, the one that is not a green house gas 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
The correct order of the basic strength of methyl substituted amines in aqueous solution is :
For an ideal solution, the correct option is :