List of top Chemistry Questions asked in JEE Main

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

In which of the following reactions the hydrogen peroxide acts as a reducing agent?

'$A$' in the given reaction is

Incorrect statement for the use of indicators in acid-base titration is :

Find out the major product from the following reaction

The structures of major products A , B and C in the following reaction are sequence

Cyclohexylamine when treated with nitrous acid yields (P) On treating (P) with $PCC$ results in (Q) When $(Q)$ is heated with dil. $NaOH$ we get $(R)$ The final product $(R)$ is :

Which one of the following sets of ions represents a collection of isoelectronic species ?
(Given : Atomic Number : $F : 9, Cl : 17, Na =11, Mg =12, Al =13, K =19, Ca =20, Sc =21$)

The isomeric deuterated bromide with molecular formula $C _4 H _8 DBr$ having two chiral carbon atoms is

Match List I with List II :

List-I Polymer		List-II used for items
A	Nylon 6,6	I	Buckets
B	Low density polythene	II	Non-stick utensils
C	High density polythene	III	Bristles of brushes
D	Teflon	IV	Toys

Consider the following reaction

The correct statement for product $B$ is It is

$CH_3 - CH_2 - CN \xrightarrow[\text{Ether}]{CH_3MgBr} A \xrightarrow{H_3O^+} B \xrightarrow[HCl]{Zn - Hg} C$ The correct structure of $C$ is

A hydrocarbon ' $X$ ' with formula $C _6 H _8$ uses two moles of $H _2$ on catalytic hydrogenation of its one mole On ozonolysis, ' $X$ ' yields two moles of methane dicarbaldehyde The hydrocarbon ' $X$ ' is :

Arrange the following in decreasing acidicstrength

$H _2 O _2$ acts as a reducing agent in

In a reaction,

reagents ' X ' and ' Y ' respectively are :

An organic compound 'A' with emperical formula $C _6 H _6 O$ gives sooty flame on burning Its reaction with bromine solution in low polarity solvent results in high yield of $B .B$ is

Cobalt chloride when dissolved in water forms pink colored complex $X$ which has octahedral geometry. This solution on treating with cone $HCl$ forms deep blue complex, $\underline{Y}$ which has a $\underline{Z}$ geometry $X, Y$ and $Z$, respectively, are

In base vs Acid titration, at the end pointmethyl orange is present as

Match List I with List II

LIST I		LIST II
A	X_eF₄	I	See-saw
B	SF₄	II	Square planar
C	NH₄+	III	Bent T-shaped
D	BrF₃	IV	Tetrahedral

Choose the correct answer from the options given below :

The correct increasing order of the ionic radii is

Given below are two statements :

Statement I : Sulphanilic acid gives esterification test for carboxyl group

Statement II : Sulphanilic acid gives red colour in Lassigne's test for extra element detection In the light of the above statements, choose the most appropriate answer from the options given below :

Choose the correct set of reagents for the following conversion trans $\left( Ph - CH = CH - CH _3\right) \rightarrow \operatorname{cis}\left( Ph - CH = CH - CH _3\right)$

For electron gain enthalpies of the elements denoted as$\Delta_{ eg } H$, the incorrect option is :

If the pKa of lactic acid is 5, then the pH of 0.005 M calcium lactate solution at $25^\circ \text{C}$ is $\_\_\_\_\_\_ \times 10^{-1}$ (Nearest integer).
Lactic Acid