List of top Chemistry Questions asked in NEET (UG)

For the reaction 2A⇋ B + C, KC = 4 × 10^–3 . At a given time, the composition of reaction mixture is: [A] = [B] = [C] = 2 × 10–3 M. Then, which of the following is correct?

Consider the following reaction in a sealed vessel at equilibrium with concentrations of
N₂ = 3.0 × 10^–3 M, O₂ = 4.2 × 10^–3 M and NO = 2.8 × 10^–3 M.
2NO_(g)⇋N2(g) + O_2(g) 
If 0.1 mol L^–1 of NO_(g) is taken in a closed vessel, what will be degree of dissociation (a) of NO_(g) at equilibrium?

The work done during reversible isothermal expansion of one mole of hydrogen gas at 25^oC from a pressure of 20 atm to 10 atm is:
(Given R = 2.0 cal K^-1 mol^-1)

Given below are certain cations. Using inorganic qualitative analysis, arrange them in increasing group number from 0 to VI.
A) Al³⁺
B) Cu²⁺
C) Ba²⁺
D) Co²⁺
E) Mg²⁺
Choose the correct answer from the options given below

Identify the correct answer

The plot of osmotic pressure II) vs concentration (mol L^–1 ) for a solution gives a straight line with slope 25.73 L bar mol^–1 . The temperature at which the osmotic pressure measurement is done is
(Use R = 0.083 L bar mol–1 K^–1 )

During the preparation of Mohr’s salt solution (Ferrous ammonium sulphate), which of the following acid is added to prevent hydrolysis of Fe²⁺ ion?

The rate of a reaction quadruples when temperature changes from 27°c to 57°c. Calculate the energy of activation
Given R=8.314 J K-1 mol-1, log 4=0.6021

The products A and B obtained in the following reactions, respectively, are
3ROH+PCI₃→3RCI+A 
ROH+PCI₅→RCI+HCI+B

For given reaction: 

‘P’ is

Mass in grams of copper deposited by passing 9.6487 A current through a voltmeter containing copper sulphate solution for 100 seconds is (Given : Molar mass of Cu : 63 g mol^–1 , 1 F = 96487 C)

Given below are two statements :
Statement I : [Co(NH₃)₆] ³⁺ is a homoleptic complex whereas [Co(NH₃)4Cl₂] ⁺ is a heteroleptic complex. 
Statement II : Complex [Co(NH₃)₆] ³⁺ has only one kind of ligands but [Co(NH₃)₄Cl₂] ⁺ has more than one kind of ligands. 
In the light of the above statements, choose the correct answer from the options given below

The pair of Lanthanoid ions which are diamagnetic is

Match List I with List II

List-I (Reaction)		List-II  (Reagents/Condition)
(A)		(I)
(B)		(II)	CrO3
(C)		(III)	KMnO4/KOH, \(\Delta\)
(D)		(IV)	(i) O3 (ii) Zn-H2O

Choose the correct answer from the options given below:

On heating, some solid substances change from solid to vapour state without passing through liquid state. The technique used for the purification of such solid substances based on the above principle is known as

Given below are two statements:
Statement I: Both [Co(NH₃)₆]³⁺ and [CoF₆]^3- complexes are octahedral but differ in their magnetic behaviour.
Statement II: [Co(NH₃)₆]³⁺ is diamagnetic whereas [CoF₆]^3- is paramagnetic.
In the light of the above statements, choose the correct answer from the options given below:

Match List I with List II

List-I (Process)		List-II  (Conditions)
(A)	Isothermal process	(I)	No heat exchange
(B)	Isochoric process	(II)	Carried out at constant temperature
(C)	Isobaric process	(III)	Carried out at constant volume
(D)	Adiabatic process	(IV)	Carried out at constant pressure

Choose the correct answer from the options given below:

Fehling’s solution ‘A’ is

A compound with a molecular formula of C₆H₁₄ has two tertiary carbons. Its IUPAC name is:

In which of the following equilibria, K_p and K_e are NOT equal?

Identify the correct reagents that would bring about the following transformation.

The reagents with which glucose does not react to give the corresponding tests/products are
A. Tollen's reagent
B. Schiff's reagent
C. HCN
D NH₂OH
E. NaHSO₃
Choose the correct options from the given below:

The E° value for the Mn³⁺/Mn²⁺ couple is more positive than that of Cr³⁺/Cr²⁺ or Fe³⁺/Fe²⁺ due to change of