List of top Chemistry Questions asked in NEET (UG)

Select the incorrect reaction among the following:
The UV-visible absorption bands in the spectra of lanthanoid ions are ‘X’, probably because of the excitation of electrons involving ‘Y’. The ‘X’ and ‘Y’, respectively, are :
Match List-I with List-II :
List - I(Block/group in periodic table)List - II(Element)
(A) Lanthanoid(I) Ce
(B) d-block element(II) As
(C) p-block element(III) Cs
(D) s-block element (IV) Mn
Identify the correct answer from the options given below :
The major product D formed in the following reaction sequence is:
reaction sequence
Identify the incorrect statement about PCl5:
Which indicator is used in the titration of sodium hydroxide against oxalic acid and what is the colour change at the end point?
Baeyer’s reagent is :
The major product X formed in the following reaction sequence is:
reaction sequence
Which of the following is not an ambidentate ligand?
Given below are two statements:
Statement I: Propene on treatment with diborane gives an addition product with the formula \(((\text{CH}_3)_2 - \text{CH}_3\text{B})\).
Statement II: Oxidation of \(((\text{CH}_3)_2 - \text{CH}_3\text{B})\) with hydrogen peroxide in presence of NaOH gives propan-2-ol.
In the light of the above statements, choose the most appropriate answer from the options given below:
Match List-I with List-II :
List - I(Atom/Molecule)List - II(Property)
(A) Nitrogen atom(I) Paramagnetic
(B) Fluorine molecule(II) Most reactive element in group 18
(C) Oxygen molecule(III) Element with highest ionisation enthalpy in group 15
(D) Xenon atom (IV) Strongest oxidising agent
Identify the correct answer from the options given below :
Identify the incorrect statement from the following:
From the following select the one which is not an example of corrosion.
Which of the following set of ions act as oxidising agents?
The amount of glucose required to prepare 250 mL of \( \frac{M}{20} \) aqueous solution is:
(Molar mass of glucose: 180 g mol-1)

Which of the following molecules has "NON ZERO" dipole moment value?

Ethylene diaminetetraacetate ion is a/an:
For the reaction in equilibrium:
N2(g) + 3H2(g) ⇌ 2NH3(g), ΔH = -Q
Reaction is favoured in forward direction by:

At a given temperature and pressure, the equilibrium constant values for the equilibria are given below:
$ 3A_2 + B_2 \rightleftharpoons 2A_3B, \, K_1 $
$ A_3B \rightleftharpoons \frac{3}{2}A_2 + \frac{1}{2}B_2, \, K_2 $
The relation between $ K_1 $ and $ K_2 $ is:

Choose the correct statement for the work done in the expansion and heat absorbed or released when 5 litres of an ideal gas at 10 atmospheric pressure isothermally expands into vacuum until volume is 15 litres :
Weight (g) of two moles of the organic compound, which is obtained by heating sodium ethanoate with sodium hydroxide in the presence of calcium oxide is :
Taking stability as the factor, which one of the following represents correct relationship?
The conductivity of centimolar solution of KCI at 25°C is 0.0210 ohm-1cm-1 and the resistance of the cell containing the solution at 25°C is 60 ohm. The value of the cell constant is :

Which one is an example of heterogenous catalysis?

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: A reaction can have zero activation energy.
Reasons R: The minimum extra amount of energy absorbed by reactant molecules so that their energy becomes equal to threshold value, is called activation energy.
In the light of the above statements, choose the correct answer from the options given below: