List of top Chemistry Questions asked in JEE Main

The correct statements among I to III are : (I) Valence bond theory cannot explain the color exhibited by transition metal complexes. (II) Valence bond theory can predict quantitatively the magnetic properties of transtition metal complexes. (III) Valence bond theory cannot distinguish ligands as weak and strong field ones.
The correct structure of histidine in a strongly acidic solution (pH=2) is
The decreasing order of electrical conductivity of the following aqueous solutions is : 0.1 M Formic acid (A), 0.1 M Acetic acid (B) 0.1 M Benzoic acid (C)
The increasing order of nucleophilicity of the following nucleophiles is : (a) ${CH_3CO^{\ominus}_2}$ (b) ${H_2O} $ (c) ${CH_3SO^{\ominus}_3}$ (d) ${O^{\ominus}H}$
The IUPAC symbol for the element with atomic number $119$ would be :
The noble gas that does NOT occur in the atmosphere is:
The $pH$ of rain water, is approximately :
The product formed in the reaction of cumene with $O_2$ followed by treatment with dil. $HCl$ are :
Two pi and half sigma bonds are present in:
What is the molar solubility of $Al(OH)_3$ in $0.2\, M\, NaOH$ solution ? Given that, solubility product of $Al(OH)_3 = 2.4 \times 10^{-24}$ :
What would be the molality of $20\%$ (mass / mass) aqueous solution of $KI$? (molar mass of $KI = 166\, g\, mol^{-1}$)
Which amongst the following is the strongest acid ?
With respect to an ore, Ellingham diagram helps to predict the feasibility of its -
Which of the following statements is not true about RNA?
Which of the following is a thermosetting polymer?
Which of the following is a condensation polymer?
$5$ moles of an ideal gas at $100\, K$ are allowed to undergo reversible compression till its temperature becomes $200\, K$. If $C_{V} =28 JK^{-1}mol^{-1} , caculate \Delta\, U$ and $\Delta \,pV $ for this process. ($R = 8.0 \, JK^{-1}mol^{-1}$]
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)
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 $2 V_o$ .
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 compound that inhibits the growth of tumors is :