List of top Chemistry Questions asked in KEAM

Complete combustion of 0.858 g of compound $ X $ gives 2.63 g of $ C{{O}_{2}} $ and 1.28 g of $ {{H}_{2}}O $ . The lowest molecular weight which $ X $ can have, is:

Ammonia will not form complex with

Reaction of diborane with ammonia gives initially

Among the following, the optically active compound is

For the reaction $ 2{{N}_{2}}{{O}_{5}}(g)\xrightarrow[{}]{{}}4N{{O}_{2}}(g)+{{O}_{2}}(g) $ if the concentration of $ N{{O}_{2}} $ increases by $ 5.2\times {{10}^{-3}} $ M in 100 s then the rate of the reaction is:

Sphalerite is concentrated by

IUPAC name of $ C{{H}_{3}}CH=\underset{\begin{align} & | \\ & C{{H}_{2}} \\ & | \\ & C{{H}_{3}} \\ \end{align}}{\mathop{C}}\,C{{H}_{3}} $

An atom with high electronegativity has

$1.5\, g$ of a non-volatile, non-electrolyte is dissolved in $50 \,g$ benzene $(K_b\, =\, 2.5\, K kg \,mol^{-1}$ ). The elevation of the boiling point of the solution is $0.75\, K$. The molecular weight of the solute in $g$ $mol^{-1}$ is

A gas mixture contains 50% helium and 50% methane by volume. What is the percent by weight of methane in the mixture ?

Ammonium ion $\left( NH _{4}^{+}\right)$ reacts with nitrite ion $\left( NO _{2}^{-}\right)$ in aqueous solution according to the equation $NH _{4}^{+}(a q)+ NO _{2}^{-}(a q) \longrightarrow N _{2}(g)+2 H _{2} O (l)$ The following initial rates of reaction have been measured for the given reactant concentrations. Which of the following is the rate law for this reaction?

Excess nitrate in drinking water can cause

A lone pair of electrons in an atom implies

Adsorption is accompanied by

$20.0 \,kg$ of $N_2(g)$ and $3.0\, kg$ of $H_2(g)$ are mixed to produce $NH_3(g)$. The amount of $NH_3(g)$ formed is

Amine that cannot be prepared by Gabriel- phthalimide synthesis is

Hard acids prefer to combine with

Choose the reaction with negative $\Delta$S value

The increasing order of the density of alkali metals is

Which one of the following has the highest molar conductivity?

In a closed cylinder of capacity $24.6\,L$, the following reaction occurs at $27^{\circ} C$. $A_{2}(s) \rightleftharpoons B_{2}(s)+2 C(g)$ At equilibrium, $1 \,g$ of $B_{2}(s)$ (molar mass $=50\, g\, mol ^{-1}$ ) is present. The equilibrium constant $K_{p}$ for the equilibrium in atm $^{2}$ unit is $\left(R=0.082\, L\, atm \,K ^{-1} \,mol ^{-1}\right)$

In the reaction,$2KMnO_4 + 16 HCl \rightarrow 5Cl_2 + 2MnCl_2 + 2KCl+8H_2O $ reduction product is

In aqueous solution, $Cr^{2+}$ is stronger reducing agent than $Fe^{2+}$. This is because

In the adsorption of a gas on solid, Freundlich isotherm is obeyed. The slope of the plot is zero. Thus, the extent of adsorption is

Which of the following pair have identical bond order?