List of top Chemistry Questions asked in KCET

In electrophillic aromatic substitution reaction, the nitro group is meta directing because it
A covalent molecule $AB_3$ has pyramidal structure. The number of lone pair and bond pair electrons in the molecule are respectively
An organic compound on heating with $CuO$ produces $CO_2$, but no water. The organic compound may be
Ribose sugar is present in
IUPAC name of $(CH_3)_3CCl$
The rate equation for a reaction : $A \rightarrow B$ is $r = K[A]^\circ$. If the initial concentration of the reactant is a mol $dm^{-3}$, the half life period of the reaction is
Excess of carbon dioxide is passed through $50 \,mL$ of $0.5\, M$ calcium hydroxide solution. After the completion of the reaction, the solution was evaporated to dryness. The solid calcium carbonate was completely neutralised with $0.1\, N$ Hydrochloric acid. The volume of Hydrochloric acid required is (At. mass of calcium = $40$)
The oxidation state of $Fe$ in the brown ring complex : $[Fe(H_2O)_5 NO]SO_4$ is
The incorrect statement in respect of Chromyl chloride test is

Argon is used:

The reaction involved in the oil of winter green test is salicylic acid ${->[{\Delta}][{\text { Conc. } H _{2} SO _{4}}]}$ product. The product is treated with $Na _{2} CO _{3}$ solution. The missing reagent in the above reaction is
The carbon-carbon bond length in Benzene is
$ {CH_3COOH ->[LiA/H_4] X ->[Cu][300 ^{\circ}C] Y ->[dilute][NaOH] Z}$ In the above reaction $Z$ is
A compound of $'A'$ and $'B'$ crystallises in a cubic lattice in which the $'A'$ atoms occupy the lattice points at the corners of the cube. The $'B'$ atoms occupy the centre of each face of the cube. The probable empirical formula of the compound is
A 6% solution of urea is isotonic with
In the electrolysis of acidulated water, it is desired to obtain $1.12\, cc$ of Hydrogen per second under $S.T.P.$ condition. The current to be passed is
$10^{-6}\, M\, NaOH$ is diluted $100$ times. The $pH$ of the diluted base is
A bivalent metal has an equivalent mass of $32$. The molecular mass of the metal nitrate is
Among the following, the compound that contains ionic, covalent and coordinate linkage is
The enthalpy of formation of $NH_3$ is $- 4 6\, kJ \, mol^{-1}$. The enthalpy change for the reaction : $2 NH _{3}(g) \longrightarrow N _{2}(g)+3 H _{2}(g)$ is
The r.m.s. velocity of molecules of a gas of density $4 \,kg \,m^{-3}$ and pressure $1.2 \times10^{5} Nm^{-2}$ is
$30\, cc$ of $\frac {M}{3}\, HCl, 20\, cc$ of $\frac {M}{N} HNO_3$ and $40\, cc$ of $\frac {M}{4}$ $NaOH$ solutions are mixed and the volume was made up to $1\, dm^3$. The $pH$ of the resulting solution is
The electrophile involved in the sulphonation of Benzene is
Cooking is fast in a pressure cooker, because
Helium is used in balloons in place of hydrogen because it is