List of top Chemistry Questions asked in KEAM

$CO_2$ is taken in a closed container at $1500$ K and at a pressure of $0.6$ bar. When a certain amount of carbon is added to the system at equilibrium some of $CO_2$ is converted into $CO$ and the equilibrium pressure is $0.9$ bar. What is the $K_p$ value at $1500$ K for the equilibrium $CO_2(g)+C(s)\rightleftharpoons2CO(g)$?

Which of the following molecule has double bond with two $\pi$ bonds?

The quantity of heat necessary to raise the temperature of $60$ g of metal X from $30^\circ C$ to $54^\circ C$ is (Molar heat capacity of metal X = $25$ J mol$^{-1}$ K$^{-1}$ and molar mass = $30$ g mol$^{-1}$)

In the reaction $O_2(g)+4H^+(aq)+4e^- \rightarrow 2H_2O(l)$, the quantity of electricity needed to reduce one mole of gaseous oxygen is $(E^\circ_{cell}=1.23V)$

The $\Delta G^\circ$ for the reaction $3X(g)+2Y(g)\rightarrow3Z(g)$ at $298K$ is ($\Delta H^\circ=-13$ kJ mol$^{-1}$ and $\Delta S^\circ=-45$ J K$^{-1}$ mol$^{-1}$)

Which of the following ions are isoelectronic?

The correct increasing order of number of electrons around the central atom in the following molecules is

The correct order of metallic radius of the elements is

Which of the following statements are incorrect about boundary surface diagram of orbital?} (i) A boundary surface is drawn in space for an orbital on which the value of probability density $|\Psi|^2$ is constant.} (ii) The boundary surface for $|\Psi|^2$ and $|\Psi|$ are not identical.} (iii) The density of the dots represents the probability density of finding the electron in the region.} (iv) In $1s$ and $2s$ orbitals, the probability of finding electron at a given distance is not equal in all the directions.} (v) The $2p$ orbitals in the boundary surface diagram are not spherical.

The mass of sodium acetate required to prepare $250$ mL of $0.4$ M aqueous solution is \ (Molar mass of sodium acetate = $82$ g mol$^{-1}$)

Which of the following statements are incorrect about boundary surface diagram of orbital?} (i) A boundary surface is drawn in space for an orbital on which the value of probability density $|\Psi|^2$ is constant.} (ii) The boundary surface for $|\Psi|^2$ and $|\Psi|$ are not identical.} (iii) The density of the dots represents the probability density of finding the electron in the region.} (iv) In $1s$ and $2s$ orbitals, the probability of finding electron at a given distance is not equal in all the directions.} (v) The $2p$ orbitals in the boundary surface diagram are not spherical.

The mass of sodium acetate required to prepare $250$ mL of $0.4$ M aqueous solution is \ (Molar mass of sodium acetate = $82$ g mol$^{-1}$)

Pyridinium chlorochromate is a complex of

IUPAC name of $CH_3-CH(OH)-CH_2-CH(OH)-CH(C_2H_5)-CH_2CH_3$ is

The increasing order of boiling point of the following amines is

Which of the following amines does not form carbylamine?

An organic compound with molecular formula $C_5H_{10}O$ does not reduce Tollens’ reagent but forms an addition compound with sodium hydrogen sulphite and gives positive iodoform test. On vigorous oxidation, it gives ethanoic and propanoic acids. The compound is:

The reagent used for the conversion of decanol into decanoic acid is

In Swarts reaction, Freon-12 is manufactured from

Which of the following are carcinogenic hydrocarbons? (i) 1,2-Benzanthracene
(ii) Pent-1-yne
(iii) 1,2-Benzpyrene
(iv) Cyclohexane
(v) 3-Methylcholanthrene

In chemotherapy, the ligand used to remove the excess of copper is

IUPAC name of $(CH_3)_3C-CH_2Br$ is

In Carius method, $0.40\,g$ of an organic compound gave $0.188\,g$ of $AgBr$. The percentage of bromine in the compound is (Atomic mass of Ag = 108 g mol$^{-1}$ and Br = 80 g mol$^{-1}$)

Which of the following statements are true about electronegativity? (i) Electronegativity generally increases across a period and decreases down a group.
(ii) The electronegativity of a given element is constant.
(iii) The electronegativity values decrease with the increase in atomic radii.
(iv) Electronegativity is directly related to the metallic property of the elements.
(v) Electronegativity is inversely related to the non-metallic property of the elements.

Some transition metal ions given below contain spin only magnetic moment (BM). Which of the following is not correctly matched?