List of top Chemistry Questions asked in KEAM

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?

Reaction of diborane with ammonia gives initially

A binary solid has a primitive cubical structure with $B^-$ ions constituting the lattice points and $A^+$ ions occupying $25\%$ of its tetrahedral holes. The molecular formula of the crystal 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:

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

Ammonia will not form complex with

Syngas is a mixture of

$20.0 \,kg$ 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

Excess nitrate in drinking water can cause

Choose the reaction with negative $\Delta$S value

Adsorption is accompanied by

A lone pair of electrons in an atom implies

Hard acids prefer to combine with

Amine that cannot be prepared by Gabriel- phthalimide synthesis is

Which one of the following has the highest molar conductivity?

The increasing order of the density of alkali metals is

Which among the following statements are correct? (i) Carbon monoxide is neutral whereas $ S0_3 $ is acidic (ii) Potassium oxide is basic whereas nitrous oxide is acidic (iii) Aluminium and zinc oxides are amphoteric (iv) Sulphur trioxide is acidic whereas phosphorus pentoxide is basic (v) Carbon dioxide is netural whereas sulphur dioxide is amphoteric

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

Which of the following pair have identical bond order?

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 $\left(R=0.082\, L\, atm \,K ^{-1} \,mol ^{-1}\right)$

Which of the following molecule is planar?

The values if ?H and ?S for the reaction C(graphite) + CO(g) ?2CO(g) Are 170 kJ and 170 JK-1 respectively. The reaction will be spontaneous only a

The neopentyl halide in ethanol yields alkenes by $E1$ mechanism due to

Substance which is weakly repelled by a magnetic field is

In an ionized gas the mobile charge carriers are