List of top Questions asked in KEAM

If $ f(x)=(x-2)(x-4)(x-6)....(x-2n), $ then $ f'(2) $ is

The basicity of pyrophosphorous acid is

$ A(g)+3B(g)4C(g) $ Initially concentration of $ A $ is equal to that of $ B $ . The equilibrium concentrations of $ A $ and $ C $ are equal. $ {{K}_{c}} $ is:

Among the following, which species represents a pseudohalide?

$ {{(C{{H}_{3}})}_{3}}CMgCl $ on reaction with $ {{D}_{2}}O $ produces

An alkene $ {{C}_{4}}{{H}_{8}} $ , was treated with ozone and then with zinc and water to give acetone and formaldehyde. The alkene is:

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:

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

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

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

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?

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:

An atom with high electronegativity has

Reaction of diborane with ammonia gives initially

$1.5\, g$ 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

Sphalerite is concentrated by

Syngas is a mixture of

Choose the reaction with negative $\Delta$S value

$20.0 \,kg$ 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

A lone pair of electrons in an atom implies

Adsorption is accompanied by

Amine that cannot be prepared by Gabriel- phthalimide synthesis is