List of top Questions asked in NEET (UG)

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:

Which of the following examples show monocarpellary, unilocular ovary with many ovules?
A. Sesbania
B. Brinjal
C. Indigofera
D. Tobacco
E. Asparagus
Choose the correct answer from the options given below :

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

Among Group 16 elements, which one does NOT show -2 oxidation state?

Match List I with List II

List-I (Quantum Number)		List-II  (Information provided)
(A)	mI	(I)	Shape of orbital
(B)	ms	(II)	Size of orbital
(C)	I	(III)	Orientation of orbital
(D)	n	(IV)	Orientation of spin of electron

Choose the correct answer from the options given below:

Which reaction is NOT a redox reaction?

In which of the following processes entropy increases?
A. A liquid evaporates to vapour.
B. Temperature of a crystalline solid lowered from 130 K to 0 K.
C. 2NaHCO₃(s) → Na₂CO₃(s)+CO₂(g)+H₂O(g)
D. Cl₂(g) → 2Cl(g)
Choose the correct answer from the options given below:

Which plot of ln k vs \(\frac{1}{T}\) is consistent with Arrhenius equation?

Match List I with List II

List-I (Compound)		List-II (Shape/geometry)
(A)	NH3	(I)	Trigonal Pyramidal
(B)	BrF5	(II)	Square Planar
(C)	XeF4	(III)	Octahedral
(D)	SF6	(IV)	Square Pyramidal

Choose the correct answer from the options given below:

Match List I with List II

List-I (Conversion)		List-II  (Shape/geometry)
(A)	1 mol of H2O to O2	(I)	3F
(B)	1 mol of MnO-4 to Mn2+	(II)	2F
(C)	1.5 mol of Ca from molten CaCl2	(III)	1F
(D)	1 mol of FeO to Fe2O3	(IV)	5F

Choose the correct answer from the options given below:

Arrange the following elements in increasing order of electronegativity:
N, O, F, C, Si
Choose the correct answer from the options given below:

Given below are two statements:
Statement I: Aniline does not undergo Friedel-Crafts alkylation reaction.
Statement II: Aniline cannot be prepared through Gabriel synthesis.
In the light of the above statements, choose the correct answer from the options given below

Activation energy of any chemical reaction can be calculated if one knows the value of

The most stable carbocation among the following is:

Which one of the following alcohols reacts instantaneously with Lucas reagent?

The compound that will undergo S_N1 reaction with the fastest rate is