List of top Chemistry Questions asked in JEE Main

$6$ litres of an alkene require $27$ litres of oxygen at constant temperature and pressure for complete combustion. The alkene is:

Arrange in the correct order of stability (decreasing order) for the following molecules :

The order of basicity of amines in gaseous state is:

The molarity of a solution obtained by mixing $750\, mL$ of $0.5\, M \,HCl$ with $250\, mL$ of $2 \,M \,HCl$ will be

The correct set of four quantum numbers for the valence electrons of rubidium atom $(Z = 37)$ is

Sodium Carbonate cannot be used in place of $(NH_4)_2CO_3$ for the identification of $Ca^{2+},\, Ba^{2+}$ and $Sr^{2+}$ ions (in group V) during mixture analysis because :

Equimolar solutions of the following compounds are prepared separately in water. Which will have the lowest pH value ?

In which of the following exothermic reactions, the heat liberated per mole is the highest ?

\(12\, g\) of a nonvolatile solute dissolved in \(108\, g\) of water produces the relative lowering of vapor pressure of \(0.1.\)The molecular mass of the solute is :

A compound with molecular mass $180$ is acylated with $CH_3COCl$ to get a compound with molecular mass $390$. The number of amino groups present per molecule of the former compound is

Bond distance in $HF$ is $9.17 \times 10^{-11}\, m$. Dipole moment of $HF$ is $6.10^4 \times 10^{-30}\, Cm$ . The percentage ionic character in $HF$ will be : (electron charge $= 1.60 \times 10^{-19}\, C$)

Which one of the following molecules is polar?

Monocarboxylic acids are functional isomers of:

A major component of Borsch reagent is obtained by reacting hydrazine hydrate with which of the following ?

A solution of $(-) 1-chloro-1-$phenylethane in toluene racemises slowly in the presence of a small amount of $SbCl_5$, due to the formation of

The Wurtz-Fittig reaction involves condensation of:

An ether (A), $C_5H_{12}O$, when heated with excess of hot concentrated $HI$ produced two alkyl halides which when treated with $NaOH$ yielded compounds (B) and (C). Oxidation of (B) and (C) gave a propanone and an ethanoic acid respectively. The IUPAC name of the ether (A) is :

Arrange the following compounds in the order of decreasing acidity

Glycosidic linkage is actually an :

Which of the following enzyme converts starch into maltose?

Which of the following structures represents thymine?

Natural glucose is termed D-glucose because :

Which one of the following is most stable?

In reaction $A + 2B {\rightleftharpoons} 2C + D$, initial concentration of $B$ was $1.5$ times of $[A]$, but at equilibrium the concentrations of $A$ and $B$ became equal. The equilibrium constant for the reaction is :

A gaseous hydrocarbon gives upon combustion $0.72\, g$ of water and $3.08\, g$ of $CO_2$. The empirical formula of the hydrocarbon is