List of top Chemistry Questions asked in AIEEE

In Bohr series of lines of hydrogen spectrum, the third line from the red end corresponds to which one of the following inner-orbit jumps of the electron for Bohr orbits in an atom of hydrogen ?

During dehydration of alcohols to alkenes by heating with concentrated $H _{2} SO _{4}$ the initiation step is :

Which one of the following is an amphoteric oxide?

Ethyl isocyanide on hydrolysis in acidic medium generates

When rain is accompanied by a thunderstorm, the collected rain water will have a pH value

Bottles containing $ {C6H5I}$ and $ {C6H5CH2I}$ lost their original labels. They were labelled A and B for testing. A and B were separately taken in test tubes and boiled with $ {NaOH }$ solution. The end solution in each tube was made acidic with dilute $ {HNO3}$ and then some $ {AgNO3}$ solution was added. Substance B gave a yellow precipitate. Which one of the following statements is true for this experiment ?

Several blocks of magnesium are fixed to the bottom of a ship to

For making good quality mirrors, plates of float glass are used. These are obtained by floating molten glass over a liquid metal which does not solidify before glass. The metal used can be

The atomic number of V, Cr, Mn and Fe are respectively 23, 24, 25 and 26.Which one of these may be expected to have the highest second ionisation enthalpy ?

According to the kinetic theory of gases, in an ideal gas, between two successive collisions, a gas molecule travels

The solubilities of carbonates decrease down the magnesium group due to a decrease in :

Which one of the following processes will produce hard water ?

The substance not likely to contain $CaCO _{3}$ is:

In curing cement plasters water is sprinkled from time to time. This helps in :

In an irreversible process taking place at constant $T$ and $P$ and in which only pressure-volume work is being done, the change in Gibbs free energy (dG) and change in entropy (dS), satisfy the criteria:

The internal energy change when a system goes from state $A$ to $B$ is $40 \,k J / mol$. If the system goes from $A$ to $B$ by a reversible path and returns to state $A$ by an irreversible path, what would be the net change in internal energy?

The de-Broglie wavelength of a tennis ball of mass $60\, g$ moving with a velocity of $10 m / s$ is approximately : (Planck's constant, $h=6.63 \times 10^{-34} \,Js$ )

Several blocks of magnesium are fixed to the bottom of a ship to :

An aqueous solution of $1M \,NaCl$ and $1M \,HCl$ is:

When $KMnO_4 $acts as an oxidising agent and ultimately forms $MnO^{2-}_4, MnO_2, Mn_2O_3 \, and \, Mn^{2+}$. Then the number of electrons transferred in each case respectively

A similarity between optical and geometrical isomerism is that

A solution of an acid has pH = 4.70. Find out the number of $OH^-$ ions $(pK_w = 14)$

How do we differentiate between $Fe^{3+}$ and $Cr^{3+}$ in group III ?

Geometrical isomerism is not shown by :

Which of the following is a redox reaction?