List of top Chemistry Questions asked in JEE Main

2[Au(CN)2]– + Zn \(\to\) [Zn(CN)4]2– + 2Au\(\downarrow\) is which of these 
(A) Redox reaction 
(B) Displacement reaction
(C) Combination reaction
(D) Decomposition reaction 

Number of ambidentate ligands in given complex [M(en)(SCN)4]:
Which of the following reaction is correct?

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


Product (P) and (Q) are respectively

Oxidation number of Mo in Ammonophosphomolybdate

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: Hydrolysis of an alkyl chloride is a slow reaction but in the presence of NaI, the rate of the hydrolysis increases
Reason R: $\,I ^{-}$is a good nucleophile as well as a good leaving group
In the light of the above statements, choose the correct answer from the options given below

Which of the Phosphorus oxoacid can create silver mirror from $AgNO _3$ solution?
Match List I with List II
LIST ILIST II
A Cobalt catalystI \((H_2​+Cl_2​)\) production
B SyngasIIWater gas production
C Nickel catalystIII  Coal gasification
DBrine solutionIV  Methanol production
Choose the correct answer from the options given below:

An organic compound $[ A ]\left( C _4 H _{11} N \right)$, shows optical activity and gives $N _2$ gas on treatment with The structure of $A$ is :

In which of the following reactions the hydrogen peroxide acts as a reducing agent?
Match the List-I with List-II :
List I Cations A→Pb2+,Cu2+ B→Al3+,Fe3+ C→Co2+,Ni2+ D→Ba2+,Ca2+ List II Group reagent i.H2S gas in presence of dilute HCl ii. (NH4)2CO3 in presence
Compound $( X )$ undergoes following sequence of reactions to give the Lactone $( Y )$
Compound ( X ) undergoes following sequence of reactions to give the Lactone ( Y ).

Identify the product formed (A and E)
Identify the product formed (A and E)

In the cumene to phenol preparation in presence of air, the intermediate is

In the following given reaction, ' $A$ ' is

In the following given reaction, ' A ' is

Which will undergo deprotonation most readily in basic medium?
Which will undergo deprotonation most readily in basic medium?

Some reactions of $NO _2$ relevant to photochemical smog formation are 

photochemical smog formation

Identify $A , B , X$ and $Y$

'R formed in the following sequence of reactions is :
'R formed in the following sequence of reactions is :
Inert gases have positive electron gain enthalpy Its correct order is
Match List I with List II
LIST I ElementsLIST II Colour imparted to the flame
AK1Brick Red
BCa2Violet
CSr3Apple Green
DBa4Crimson Red
Choose the correct answer from the options given below: 

In the depression of freezing point experiment 

A. Vapour pressure of the solution is less than that of pure solvent 

B. Vapour pressure of the solution is more than that of pure solvent 

C. Only solute molecules solidify at the freezing point 

D. Only solvent molecules solidify at the freezing point 

Choose the most appropriate answer from the options given below:

The major products ' A ' and ' B ', respectively, are

' $A$' and ' $B$ ' formed in the following set of reactions are:
A' and ' B ' formed in the following set of reactions are:
'$A$' in the given reaction is