List of top Chemistry Questions

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

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

In a reaction,

reagents ' X ' and ' Y ' respectively are :

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 :

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

Consider the following reaction

The correct statement for product $B$ is It is

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

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 :

Glycosidic linkage between $C _1$ of $\alpha$-glucose and $C_2$ of $\beta$-fructose is found in

In the following halogenated organic compounds the one with maximum number of chlorine atoms in its structure is :

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

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

Arrange the following in decreasing acidicstrength

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

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 :

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

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

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

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

The correct order of melting points of dichlorobenzenes is

Match List I with List II :

LIST I Isomeric pairs		LIST II Type of isomers
A	Propanamine and N-Methylethanamine	I	Metamers
B	Hexan-2-one and Hexan-3-one	II	Positional isomers
C	Ethanamide and Hydroxyethanimine	II	Functional isomers
D	o-nitrophenol and p-nitrophenol	IV	Tautomers

Choose the correct answer from the options given below:

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

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

$56.0 \,L$ 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 _______ $L$