List of top Chemistry Questions asked in NEET (UG)

Arrange the following elements in increasing order of first ionization enthalpy:
Li, Be, B, C, N
Choose the correct answer from the options given below:
Given below are two statements :
Statement I: The boiling point of hydrides of Group 16 elements follow the order
H2O > H2Te > H2Se > H2S.
Statement II: On the basis of molecular mass, H2O is expected to have lower boiling point than the other members of the group but due to the presence of extensive H-bonding in H2O, it has higher boiling point.
In the light of the above statements, choose the correct answer from the options given below :
Spin only magnetic moment is same for which of the following ions?
A. T3+
B. Cr2+
C. Mn2+
D. Fe2+
E. Se3+
Choose the most appropriate answer from the options given below
Match List I with List II

List-I
(Reaction)

List-II 
(Reagents/Condition)

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

Choose the correct answer from the options given below:
Match List I with List II

List-I
(Complex)

List-II
(Type of isomerism)

(A)[Co(NH3)5(NO2)]Cl2(I)Solvate isomerism
(B)[Co(NH3)5(SO4)]Br(II)Linkage isomerism
(C)[Co(NH3)6] [Cr(CN)6](III)Ionization isomerism
(D)[Co(H2O)6]Cl3(IV)Coordination isomerism

Choose the correct answer from the options given below:
For given reaction: 
Reaction
‘P’ is
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 energy of an electron in the ground state (n=1) for He+ ion is -xJ, then that for an electron in n=2 state for Be3+ ion in J is:
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) + O2(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 ratio of solubility of AgCl in 0.1 M KCl solution to the solubility of AgCl in water is:
(Given: Solubility product of AgCl = 10−10)
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 major product C formed in the following reaction sequence: 
product C

Identify the correct answer
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 products A and B obtained in the following reactions, respectively, are
3ROH+PCI3→3RCI+A 
ROH+PCI5→RCI+HCI+B
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
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?
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, Kp and Ke are NOT equal?
Identify the correct reagents that would bring about the following transformation.
correct reagents that would bring about the following transformation. correct reagents that would bring about the following transformation.