List of top Chemistry Questions asked in NEET (UG)

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

Which of the following is an amphoteric hydroxide?

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

Which of the following reactions are disproportionation reaction?
a)\(2Cu^{+}\rightarrow Cu^{2+}+Cu^{0}\)
\(b)3MnO_4^{2-}+4H^{+} \rightarrow2MnO_4^{-}+MnO_2+2H_2O\)
\(c)2KMnO_4\frac{\Delta}{\rightarrow}K_2MnO_4+MnO_2+O_2\)
\(d)2MnO_4^{-}+3Mn^{2+}+2H_2O \rightarrow 5MnO_2+4H^\oplus\)
Select the correct option from the following:

Which of the following species is not stable ?

The manganate and permanganate ions are tetrahedral, due to:

Under isothermal condition, a gas at 300 K expands from 0.1 L. to 0.25 L against a constant external pressure of 2 bar. The work done by the gas is: [Given that 1 L bar=100J]

Which will make basic buffer?

The correct structure of tribromooctaoxide is:

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

A gas at 350 K and 15 bar has molar volume 20 percent smaller than that for an ideal gas under the same conditions. The correct option about the gas and its compressibility factor (Z) is:

The compound that is most difficult to protonate is:

Which mixture of the solutions will lead to the formation of negatively charged colloidal [Agl]I- Sol.? (

Conjugate base for Brönsted acids \(H_2O\) and \( HF\) are

The non-essential amino acid among the following is:

A compound is formed by cation C and anion A. The anions form hexagonal close packed (hcp) lattice and the cations occupy 75% of octahedral voids. The formula of the compound is :

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

The mixture that forma maximum boiling azeotrope is :

\(pH\) of a saturated solution of \(Ca(OH)_2\) is \(9\). The solubility product \((K_{sp})\) of \( Ca(OH)_2\) is: 

Which is the correct thermal stability order for\( H_2E\) (E=O, S, Se, Te and Po)? 

The structure of intermediate A in the following reaction, is;

Among the following, the one that is not a green house gas 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 diatomic molecular species has only bonds according to Molecular Orbital Theory?