List of top Chemistry Questions asked in NEET (UG)

The calculated spin only magnetic moment of $Cr^{2+}$ ion is :

Which of the following is cationic detergent?

Urea reacts with water to form $A$ which will decompose to form $B$. $B$ when passed through $Cu^{2+}(aq)$, deep blue colour solution C is formed. What is the formula of C from the following

A liquid compound (x) can be purified by steam distillation only if it is

Identify a molecule which does not exist.

The density of 2 M aqueous solution of NaOH is 1.28 g/cm$^3$. The molality of the solution is [Given that molecular mass of NaOH = 40 g mol$^{-1}$]

What is the correct electronic configuration of the central atom in \(K_4[Fe(CN)_6]\) based on crystal field theory?

For the chemical reaction \(N_2(g)+ 3H_2(g)= 2NH_3(g)\) the correct option is :

An alkene \("A"\) on reaction with \(O_3\) and \(Zn - H_2{0}\) given propanone and ethanol in equimolar ratio. Addition of \(HCI\) to alkene \("A"\) gives. \("B"\)as the major product. The structure of product \("B"\) is : 

The correct structure of tribromooctaoxide is:

Which of the following species is not stable ?

The manganate and permanganate ions are tetrahedral, due to:

The non-essential amino acid among the following is:

Match the Xenon compounds in Column-I with its structure in Column II and assign the correct code:

Column I		Column II
A	\(XeF_4\)	I	pyramidall
B	\(XeFe_6 \)	II	square planar
C	\(XeOF_4  \)	III	distorted octahedral
D	\(XeO_3\)	IV	square pyramidal

Code:

Which will make basic buffer?

The number of \(\sigma \)and \(\pi\) bonds in pent-2-en-4-yne is: 

For the cell reaction
\(2Fe^{3+}+2I^{-}_{(aq)}\rightarrow2Fe^{2+}+I_2{(aq)}\)
\(E^{\ominus}_{cell}=0.24\ V \ at \ 298 k.\)The standard Gibbs energy \((\Delta_rG^{\ominus})\) of the cell reaction is:
[Given that Faraday constant \( F=96500 \ C\ mol^{-1}]\)  

If the rate constant for a first order reaction is k the time (t) required for the completion of 99% of the reaction is given by:

The compound that is most difficult to protonate is:

The number of moles of hydrogen molecules required to produce 20 moles of ammonia through Haber's process is

Which of the following diatomic molecular species has only bonds according to Molecular Orbital Theory?

In which case change in entropy is negative? (1)(2) (3 (4)

The method used to remove temporary hardness of water is : (1) (2) (3) (4)

The biodegradable polymer is:

Among the following, the reaction that proceeds through an electrophilic substitution, is: