List of top Chemistry Questions asked in KEAM

Propanal on reaction with dilute sodium hydroxide forms:

An alloy of transition metal containing a non transition metal as a constituent is

1 mole of $FeSO_4$ (atomic weight of Fe is $55.84 \, g \, mol^{-1}$) is oxidized to $Fe_2(SO_4)_3$. Calculate the equivalent weight of ferrous ion

An invert sugar is

Aniline is treated with $NaNO_2 / HCl$ at $0^{\circ}C$ to give compound $X$ which on treatment with cuprous cyanide give another compound $Y$. When compound $Y$ is treated with $H_2/Ni$ compound $Z$ is obtained. Compound $Z$ is

Aryl halides doesn't undergo nucleophilic substitution reactions under ordinary conditions because of 1. approach of nucleophile is retarded 2. carbon carrying halogen atoms is $sp^3$ - hybridised 3. the substrate molecule is destabilised due to resonance 4. partial double bond character between carbon and halogen

For Balmer series in the spectrum of atomic hydrogen, the wave number of each line is given by $\bar\upsilon = R_H (\frac{1}{n_1^2} - \frac{1}{n_2^2})$ where $R_H$ is a constant and $n_1$and $n_2$ are integers. Which of the following statement(s) is (are) correct? 1. As wavelength decreases, the lines in the series converge 2. The integer $n_1$ is equal to $2$ 3. The ionisation energy of hydrogen can be calculated from the wave number of these lines 4. The line of longest wavelength corresponds to $n_2 = 3$

Reaction of butanone with methyl magnesium bromide following by hydrolysis gives

An important industrial solvent, also a laboratory reagent called 2-butanone is nothing but:

A dye that imparts different colours to the fabric with different metal ions is called

Facial and meridional isomerism will be exhibited by

Solubility product $(K_{sp}) $ of saturated $PbCl_2$ in water is $1.8 \times 10^{-4} \, mol^3 \, dm^{-9}$. What is the concentration of $Pb^{2+}$ in the solution?

Finkelstein reaction is an example of

Ethylene glycol reacts with excess of $PCl_5$ to give

The boiling point of methanol is greater than methyl thiol because

$Al_2(SO_4)_3$ is used in the following but not

Corundum is ................ mineral of aluminium.

An insoluble dye is reduced to a soluble colourless leuco form by an alkaline reducing agent. The fibre is soaked in the dye solution and then exposed to air to develop the colour. The dye is

The reaction of $H_2$ is given below $H_2 + CO + R - CH = CH_2 \to R - CH_2 - CH_2 - CHO$ is specifically called as

Identify the product/s in the following reaction. $ 3C{{H}_{3}}CH=C{{H}_{2}}\xrightarrow[{}]{B{{H}_{3}}}X\xrightarrow[{}]{{{H}_{2}}{{O}_{2}}/O{{H}^{-}}} $ $ product/s+{{H}_{3}}B{{O}_{3}} $

Sodium peroxide which is a yellow solid, when exposed to air becomes white due to the formation of

Allyl cyanide molecule contains

Chlorination of benzene in the presence of halogen carrier is an example of

The order of reaction is decided by

Aniline is separated from aniline-water mixture by