List of top Chemistry Questions asked in JEE Main

Choose the correct representation of conductometric titration of benzoic acid vs sodium hydroxide

The hybridization and magnetic behaviour of cobalt ion in \(\left[ Co \left( NH _3\right)_6\right]^{3+}\) complex, respectively is

A student has studied the decomposition of a gas AB3​ at 25∘C. He obtained the following data.
p(mmHg)50100200400
\(relative\space  t_{1/2}​(s)\)4210.5
The order of the reaction is……….

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R 
Assertion (A) : Benzene is more stable than hypothetical cyclohexatriene 
Reason (R) : The delocalised π-electrons cloud is attracted more strongly by the nuclei of the carbon atoms than the electron cloud localised between two carbon atoms.
In the light of the above statements, choose the correct answer from the options given below

Which will undergo deprotonation most readily in basic medium?
Which will undergo deprotonation most readily in basic medium?
In which of the following reactions the hydrogen peroxide acts as a reducing agent?
Correct statement is:

Given below are two statements:

 Statement I

 under Clemmensen reduction conditions will give

 Statement II

 under Wolff-Kishner reduction condition will give

 In the light of the above statements, choose the correct answer from the options given below:

The metal which is extracted by oxidation and subsequent reduction from its ore is:

Given below are two statements: 
Statement I : Pure Aniline and other arylamines are usually colourless.
Statement II : Arylamines get coloured on storage due to atmospheric reduction.
Choose the correct answer

Which of the following cannot be explained by crystal field theory?

Number of unpaired electron in highest occupied molecular orbital of following species is :\(N_2, N ^+_ 2 , O_2, O^+_ 2 \) ? 

Which one amongst the following are good oxidizing agents?
(A) \( \text{Sm}^{\text{2+}}\)
(B) \(\text{Ce}^{\text{2+}}\)
(C)\( \text{Ce}^{\text{4+}}\)
(D) \(\text{Tb}^{\text{4+}}\)
Choose the most appropriate answer from the options given below:

A in the above reaction is: me ch3 OET A major products
A in the above reaction is:
Number of molecules and moles in 2.8375 litre of O2 at STP.
Which of the Phosphorus oxoacid can create silver mirror from $AgNO _3$ solution?
From the figure of column chromatography given below, identify incorrect statements

A. Compound 'c' is more polar than 'a' and 'b' 
B. Compound 'a' is least polar
C. Compound 'b' comes out of the column before 'c' and after 'a' 
D. Compound 'a' spends more time in the column 
Choose the correct answer from the options given below
Match List I with List II:

List I - Complex

List II - Crystal Field Splitting energy (△0)

A.[Ti(H2O)6]2+I.– 1.2
B.[V(H2O)6]2+II.– 0.6
C.[Mn(H2O)6]3+III.0
D.[Fe(H2O)6]3+IV.– 0.8
Choose the correct answer from the options given below:
Match List I with List II
List I (Complex)List II (Hybridization)
A.Ni(CO)4I.sp3
B.[Cu(NH3)4]2+II.dsp2
C.[Fe(NH3)6]2+III.sp3d2
D.[Fe(H2O)6]2+IV.d2sp3
Choose the correct answer from the options given below:
At $298 \,K$, a 1 litre solution containing $10\, m\,mol$ of $Cr _2 O _7{ }^{2-}$ and $100\, m\,mol$ of $Cr ^{3+}$ shows a pH of 30.

Given: $Cr _2 O _7^{2-} \rightarrow Cr ^{3+} ; E ^{\circ}=1330 V$ and $\frac{2303 RT }{ F }=0059 V$.

The potential for the half cell reaction is $x \times 10^{-3} V$. The value of $x$ is ___ .

Determine the amount of urea (NH2CONH2) to be added in 1000 g of water to decrease its vapour pressure by 25%. 

$56.0 \,L$ of nitrogen gas is mixed with excess of hydrogen gas and it is found that $20\, L$ of ammonia gas is produced The volume of unused nitrogen gas is found to be _______ $L$

Sum of oxidation states of bromine in bromic acid and perbromic acid is ________
Consider the graph of Gibbs free energy G vs Extent of reaction. The number of statement/s from the following which are true with respect to points (a), (b) and (c) is…

A. Reaction is spontaneous at (a) and (b)  
B. Reaction is at equilibrium at point (b) and nonspontaneous at point (c)  
C. Reaction is spontaneous at (a) and nonspontaneous at (c)  
D. Reaction is non-spontaneous at (a) and (b)
Match List-I with List-II
 List-I-Complex  List-II-CFSE
A [Cu(NH3​)6​]2+I-0.6
B[Ti(H2​O)6​]3+II-2.0
C[Fe(CN)6​]3− III -1.2 
D [NiF6​]4-IV-0.4

Choose the correct answer from the options given below: