List of top Chemistry Questions asked in NEET (UG)

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

The number of Faradays(F) required to produce 20g of calcium from molten $CaCl_2$ (Atomic mass of $CaCl_2$ g $mol^{-1}$) is :

Which of the following is cationic detergent?

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

Identify a molecule which does not exist.

The most stable carbocation, among the following is :-

Which of the following is incorrect statement?

For the second period elements the correct increasing order of first ionisation enthalpy 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

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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$^{-1}$]

The correct structure of tribromooctaoxide 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 : 

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 \( F=96500 \ C\ mol^{-1}]\)  

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:

Which will make basic buffer?

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

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:

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

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

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

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)