List of top Chemistry Questions asked in NEET (UG)

Lithium has a $bcc$ structure. Its density is $530 \, kg \, m^{-3}$ and its atomic mass is $6.94 \, g \, mol^{-1}$. Calculate the edge length of a unit cell of Lithium metal. ($NA = 6.02 \times 10^{23} \, mol^{-1}$)

Which among the given molecules can exhibit tautomerism?

Which of the following biphenyls is optically active ?

Which of the following statement about hydrogen is incorrect ?

$MY$ and $NY_3$, two nearly insoluble salts, have the same $K_{SP}$ values of $6.2 \times 10^{-13}$ at room temperature. Which statement would be true in regard to $MY$ and $NY_3$ ?

Natural rubber has :

The hybridizations of atomic orbitals of nitrogen in $NO _{2}^{+}, NO _{3}^{-}$ and $NH _{4}^{+}$ respectively are

The rate of a first order reaction is $0.04 mol \, l^{-1} \, s^{-1}$ at 10 seconds and $0.03 \, mol \, l^{-1} \, s^{-1}$ at 20 seconds after initiation of the reaction. The half-life period of the reaction is :

Match items of Column I with the items of Column II and assign the correct code:

The suspension of slaked lime in water is known as

The highest DDT concentration in aquatic food chain shall occur in

Decreasing order of stability of $O_2, O^-_2, O_2^+ $ and ${ O_2^{2-}}$ is :

The number of water molecules is maximum in :

In which of the following pairs, both the species are not isostructural ?

Which of the statements given below is incorrect ?

A mixture of gases contains $H_2$ and $O_2$ gases in the ratio of 1 : 4 (w/w). What is the molar ratio of the two gases in the mixture?

Which of the following options represents the correct bond order ?

Which of the following pairs of ions are isoelectronic and isostructural ?

A device that converts energy of combustion of fuels like hydrogen and methane, directly into electrical energy is known as

A gas such as carbon monoxide would be most likely to obey the ideal gas law at :

Aqueous solution of which of the following compounds is the best conductor of electric current?

Cobalt (III) chloride forms several octahedral complexes with ammonia. Which of the following will not give test for chloride ions with silver nitrate at $25^{\circ } C$?

If avogadro number $N_A$, is changed from ${6.022 \times 10^{23} \, mol^{-1} }$ to ${6.022 \times 10^{20} \, mol^{-1} }$ , this would change :

If the equilibrium constant for ${ N2(g) + O2(g) <=> 2NO(g)}$ is K, the equilibrium constant for ${ \frac{1}{2} N_2 (g) + \frac{1}{2} O_2 (g) <=> NO(g) }$ will be :

In an $S_N1$ reaction on chiral centres, there is :