List of top Chemistry Questions asked in KCET

Which of the following compound possesses the "C - H" bond with the lowest bond dissociation energy ?

How many Coulombs of electricity are required for the oxidation of one mol of water to dioxygen ?

In presence of $HCl, H_2S$ results the precipitation of Group-2 elements but not Gp-4 elements during qualitative analysis. It is due to

While charging the lead storage battery

The formation of cyanohydrin from a ketone is an example of

The salt which responds to dilute and concentrated $H_2SO_4$ is

Copper is extracted from Copper pyrites by heating in a Bessemer converter. The method is based on the principle that

Using MOT, compare $O_2^+$ and $O_2^-$ species and choose the incorrect option.

One of the following amide will not undergo Hoffmann bromamide reaction :

In a first order reaction, the concentration of the reactant is reduced to $12.5\%$ in one hour. When was it half completed ?

The pair of compound which cannot exist together in solution is

In the given set of reactions, 2-Bromopropane ${ ->[{\text{AgCN}}][{\text{alc./heat}}] X ->[LiAlH_4] Y}$ the $IUPAC$ name of product $'Y'$ is

Orlon has monomeric unit

On heating potassium permanganate, one of the following compound is not obtained :

$ { MSO_4 ->[NH_4OH] $\underset{\text{white}}{ {X}}$\downarrow ->[NH_4OH][exess] Y ->[H_2S] Z \downarrow}$ Here $M$ and $Z$ are

Number of possible alkynes with formula $C_5H_8$ is

Cryolite is

Arrange the following compounds in the increasing order of their acidic strength i. $m$-nitrophenol ii. $m$-cresol iii. phenol iv. $m$-chlorophenol

For the equilibrium : $CaCO_{3_(s)} \leftrightharpoons CaO_{(s)}+CO_{2(g)}$; $K_p = 1.64 \,atm \,at \,1000\, K$ $50\, g$ of $CaCO_3$ in a $10\, litre$ closed vessel is heated to $1000\, K$. Percentage of $CaCO_3$ that remains unreacted at equilibrium is (Given $R \,= \,0.082\, L \,atm \,K^{-1} mol^{-1}$)

$25 \, cm^3$ of oxalic acid completely neutralised $0.064\, g$ of sodium hydroxide. Molarity of the oxalic acid solution is

For hydrogen - oxygen fuel cell at one $atm$ and $298\, K$ $H_2(g)+\frac {1}{2} O_2(g) \to H_2O_{(l)} ; \Delta G^\circ=-240\, kJ$ $E^\circ$ for the cell is approximately, (Given $F \,= \,96,500 \,C$)

For an ideal binary liquid mixture

For $Cr_2O_7^{-2} + 14H^{+} + 6e^{-} \to 2Cr^{+3} + 7H_2O; E $$^\circ$= $1.33 V At [Cr_2O_7 ^{-2}] = 4.5$ milli mole $[Cr^{+3}]=15$ milli mole, $E$ is $1.067\, V$.The pH of the solution is nearly equal to

A metallic oxide reacts with water to form its hydroxide, hydrogen peroxide and also liberates oxygen. The metallic oxide could be

A crystalline solid $X$ reacts with $dil. HCl$ to liberate a gas $Y.Y$ decolourises acidified $KMnO_4$. When a gas $'Z'$ is slowly passed into an aqueous solution of $Y$, colloidal sulphur is obtained. $X$ and $Z$ could be, respectively