List of top Chemistry Questions asked in NEET (UG)

Under isothermal condition, a gas at 300 K expands from 0.1 L. to 0.25 L against a constant external pressure of 2 bar. The work done by the gas is: [Given that 1 L bar=100J]

Which one is malachite from the following?

Which is the correct thermal stability order for\( H_2E\) (E=O, S, Se, Te and Po)? 

The structure of intermediate A in the following reaction, is;

The mixture that forma maximum boiling azeotrope is :

The non-essential amino acid among the following is:

Match LIST I with LIST II

LIST I		LIST II
A	Pure nitrogen	I	Chlorine
B	Haber process	II	Sulphuric acid
C	Contact process	III	Ammonia
D	Deacon's process	IV	Sodium azide or Barium azide

Which of the following is the correct option?

The compound that is most difficult to protonate is:

4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option 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 :

The volume occupied by 1.8 g of water vapour at 374 °C and 1 bar pressure will be :- [Use R = 0.083 bar L $K^{-1}mol^{-1}$]

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

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

The non-essential amino acid among the following is:

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

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)