List of top Chemistry Questions asked in JEE Main

Which one of the following equations does not correctly represent the first law of thermodynamics for the given processes involving an ideal gas ? (Assume non-expansion work is zero)

Enthalpy of sublimation of iodine is $ {24 \; cal \; g^{-1}}$ at $200^{\circ}C$. If specific heat of $I_2(s)$ and $I_2(vap)$ are $0.055$ and $0.031\, cal\, g^{-1}K^{-1}$ respectively, then enthalpy of sublimation of iodine at $250^{\circ}C$ in $cal\, g^{-1}$ is :

For diatomic ideal gas in a closed system, which of the following plots does not correctly describe the relation between various thermodynamic quantities ?

For silver, $ {C_{p}(JK^{-1} mol^{-1}) = 23 + 0.01T}$. If the temperature (T) of $3$ moles of silver is raised from $300\,K$ to $1000\, K$ at $1\, atm$ pressure, the value of $\Delta H$ will be close to

Molal depression constant for a solvent is $4.0\, kg\, mol^{-1}$. The depression in the freezing point of the solvent for $0.03\, mol\, kg^{-1}$ solution of $ {K2SO4}$ is : (Assume complete dissociation of the electrolyte)

NaH is an example of :

One mole of an ideal gas passes through a process where pressure and volume obey the relation $P =P_{o} \left[1- \frac{1}{2} \left(\frac{V_{0}}{V}\right)^{2}\right] $ .Here $P_o$ and $V_o$ are constants. Calculate the change in the temperature of the gas if its volume changes from $V_o$ to $2 V_o$ .

Peptization is a :

Sodium metal on dissolution in liquid ammonia gives a deep blue solution due to the formation of:

The $71^{st}$ electron of an element $X$ with an atomic number of $71$ enters into the orbital :

The amount of sugar $ {(C_{12}H_{22}O_{11})}$ required to prepare $2\, L$ of its $0.1\, M$ aqueous solution is :

The amphoteric hydroxide is :

The compound that inhibits the growth of tumors is :

The correct decreasing order for acid strength is :

The effect of lanthanoid contraction in the lanthanoid series of elements by and large means :

The idea of froth floatation method came from a person $X$ and this method is related to the process $Y$ of ores. $X$ and $Y$, respectively, are:

The isoelectronic set of ions is :

The major product formed in the following reaction is:

The major product formed in the following reaction is :

The metal used for making $X$-ray tube window is :

The Mond process is used for the

The number of bridging $CO$ ligand (s) and $Co - Co$ bond (s) in $ {CO_2(CO)_8}$, respectively are :

The pair that has similar atomic radii is :

The peptide that gives positive ceric ammonium nitrate and carbylamine tests is :

The primary pollutant that leads to photochemical smog is :