List of top Chemistry Questions asked in KEAM

X and Y in the below reaction are ______ and ______ respectively

C\(_6\)H\(_5\)–CO\(_2\)H + X \(\xrightarrow{\text{Heat}}\) C\(_6\)H\(_5\)–COCl \(\xrightarrow{\text{H}_2/\text{Pd/BaSO}_4\text{, Quinoline}}\) Y

Reaction of butanone with methylmagnesium bromide followed by hydrolysis gives:

The reagent ‘R’ in the given sequence of chemical reaction is:
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Zr (Z = 40) and Hf (Z = 72) have similar atomic and ionic radii because of:

The de Broglie wavelength associated with an electron accelerated by a potential of 64 V is ____.

Arrange the following amines in the decreasing order of their basic strength : Aniline (I), Benzylamine (II), p-toluidine (III)

Correct order of acidic strength:

One mole of an alkene on ozonolysis gives a mixture of one mole pentan-3-one and one mole methanal. The alkene is (2024)

CH₃CH₂Br → (aq. KOH) → A → (PCl₅) → B
Final product B:

The correct sequence of bond enthalpy of ‘C–X’ bond is:

From the following pairs of ions which one is not an iso-electronic pair?

Enthalpy of combustion of benzene, graphite, dihydrogen are \( -3260 \), \( -390 \) and \( -290\text{ kJ/mol} \). Find the enthalpy of formation of benzene

Volume ofmethanol to make 2L of 0.4M solution
\( (\text{density} = 0.64\text{KgL}^{-1}, \text{ MM} = 32\text{ g mol}^{-1}) \)

Metals used in preparation of dihydrogen in lab

Which are carcinogenic hydrocarbon
(i) 1,2 - Benzanthracene
(ii) pent-1-yne
(iii) 1,2 - Benpyrene
(iv) cyclohexane
(v) 3-methyl cholanthrene

IUPAC name of
\( \text{CH}_3 - \text{CH}(\text{OH}) - \text{CH}_2 - \text{CH}(\text{OH}) - \text{CH}(\text{C}_2\text{H}_5) \)
\( | \)
\( \text{CH}_3 - \text{CH}_2 \)

In Chemotherapy, liqannd used to remove excess of Cu

Pyridinium chlorochromate is a complex of ...........

Which pais have ability to form \( \text{p}\pi - \text{p}\pi \) multiple bonds

\( \text{X}_2 + \text{O}_2 \rightleftharpoons 2\text{XO} \)
Concenttration of \( \text{X}_2 \) and \( \text{O}_2 \) are \( 4\times 10^{-3} \) and \( 3\times 10^{-3} \) respectively. Equilibrium concentration of XO (Kc = 0.5)

Find the emf of the reaction at 298K
\( \text{Ni}_{(s)} + 2\text{Ag}^+_{2\times 10^{-3}\text{M}} \rightarrow \text{Ni}^{+2}_{4\times 10^{-2}\text{M}} + 2\text{Ag}_{(s)} \)
\( (\text{E}^0_{\text{cell}} = 1.5 \text{ at } 298\text{K}) \)

Minimum energy required to remove an atom from sodium is \( 3.313 \times 10^{-19} \text{g.} \) Maximum wavelength of radiation that will get photoelectron

Spin only magnetic moement given not correct is

Mass of ethanoic acid required to prepare 0.5m solution containing 100g of water?

Conc. of H ions in HCl solution is \( 3\times 10^{-3}\text{M} \) then pH = -------?