List of top Chemistry Questions asked in AIEEE

The following sets of quantum numbers represent four electrons in an atom. (i) $n=4, \,l= 1$ $\quad$$\quad$(ii) $n=4,\, l=0$ (iii) $n = 3,\,l=2$$\quad$$\quad$ (iv) $n = 3,\,l= 1$ The sequence representing increasing order of energy, is

The electron affinity of chlorine is $3.7\, eV. \,1$ gram of chlorine is completely converted to $Cl^-$ ion in a gaseous state. $(1\, eV = 23.06\, kcal\, mol^{-1})$. Energy released in the process is

The difference between the reaction enthalpy change $\left( \Delta_{r}H\right)$ and reaction internal energy change $\left( \Delta_{r}U\right)$ for die reaction : $2C_{6}H_{6} \left(1\right) +15O_{2} \left(g\right) \to 12CO_{2} \left(g\right) + 6H_{2}O\left(1\right)$ at $300$ K is $\left(R=8.31 \,,mol^{-1}K^{-1}\right)$

The density of a solution prepared by dissolving $120\, g$ of urea (mol. mass = $60\, u$) in $1000 \,g$ of water is $1.15\, g/mL$. The molarity of this solution is :

The d-electron configurations of $Cr^{2+},Mn^{2+},Fe^{2+}$ and $Co^{2+}$ are $d^4, d^5, d^6$ and $d^7$ respectively. Which one of the following will exhibit the lowest paramagnetic behaviour? (Atomic no. $Cr=24, Mn=25, Fe=26, Co=27$).

The correct statement for both the processes of physisorption and chemisorption is

The conversion of benzene diazonium chloride to bromobenzene can be accomplished by

Synthetic polymer bakelite can be prepared from following compounds

Square-planar geometry is shown by

Lithium forms body centred cubic structure. The length of the side of its unit cell is $351\, pm$. Atomic radius of the lithium will be :

Iron exhibits +2 and + 3 oxidation states. Which of the following statements about iron is incorrect ?

Iodoform can be prepared from all except :

In the electrolysis of alumina to obtain aluminium metal, cryolite is added mainly to

For 1 mol of an ideal gas at a constant temperature $T$, the plot of $(log\, P)$ against $(log\, V)$ is a ($P$: Pressure, $V$: Volume)

Fire extinguishers contain $H_2SO_4$ and which one of the following?

Extraction of zinc from zinc blende is achieved by

Bakelite is obtained from phenol by reacting it with

Aspirin is known as :

Amylopectin is a polymer of

Among the following which is the best description of water in the solid phase?

Among the following species which two have trigonal pyramidal shape? $\left(I\right)NI_{3}\left(II\right)I^{-}_{3}$ $\left(III\right)SO^{2-}_{3}\left(IV\right)NO^{-}_{3}$

According to Freundlich adsorption isotherm which of the following is correct?

A solid has a $'bcc?? structure. If the distance of nearest approach between two atoms is $1.73??, the edge length of the cell is

As per IUPAC nomenclature, the name of the complex $[Co (H_2O )_4(NH_3 )_2]Cl_3$ is

A metal $M$ on heating in nitrogen gas gives $Y. Y$ on treatment with $H_2O$ gives a colourless gas which when passed through $CuSO_4$ solution gives a blue colour. $Y$ is