List of top Chemistry Questions asked in NEET (UG)

A gas is allowed to expand in a well insulated container against a constant external pressure of $2.5\, atm$ from an initial volume of $2.50\, L$ to a final volume of $4.50\, L$. The change in internal energy $\Delta U$ of the gas in joules will be
The process of separation and purification of expressed protein before marketing is called :
Name the gas that can readily decolourise acidified $KMnO_4$ solution :
The species, having bond angles of $120^{\circ}$ is :-
Extraction of gold and silver involes leaching with $CN^-$ ion. Silver is later recovered by :-
The IUPAC name of the compound
The element $Z = 114$ has been discovered recently. It will belong to which of the following family/group and electronic configuration ?
Mechanism of a hypothetical reaction $X _{2}+ Y _{2} \rightarrow 2 XY$ is given below: (i) $X_{2} \rightarrow X+X$ (fast) (ii) $X + Y _{2} \rightleftharpoons XY + Y$ ( slow ) (iii) $X + Y \rightarrow XY$ (fast) The overall order of the reaction will be
Predict the correct intermediate and product in the following reaction :
The e.m.f. of a Daniell cell at $298\, K$ is $E _{1}$. $Zn / SO _{4}(0.01 M ) \| CuSO _{4}(1.0 M ) / Cu$ When the concentration of $ZnSO _{4}$ is $1.0\, M$ and that of $CuSO _{4}$ is $0.01\, M$, the e.m.f. is changed to $E _{2}$. What is the relationship between $E _{1}$ and $E _{2}$ :
Ionic mobility of which of the following alkali metal ions is lowest when aqueous solution of their salts are put under an electric field ?
Match the interhalogen compounds of column-I with the geometry in column II and assign the correct. code.
Column I Column II
(a) $XX'$ (i) T-shape
(b) $XX'_3$ (ii) Pentagonal bipyramidal
(c) $XX'_5$ (iii) Linear
(d) $XX'_7$ (iv) Square-pyramidal
(v) Tetrahedral
Which of the following is a sink for $CO$ ?
Consider the reactions :- Identify $A, X, Y$ and $Z$
Which one is the most acidic compound ?
Which of the following reactions is appropriate for converting acetamide to methanamine ?
Which one is the correct order of acidity ?
For a given reaction, $\Delta H =35.5\, kJ\, mol ^{-1}$ and $\Delta S =83.6\, JK ^{-1}\, mol ^{-1} .$ The reaction is spontaneous at $:$ (Assume that $\Delta H$ and $\Delta S$ do not vary with temperature)
With respect to the conformers of ethane, which of the following statements is true ?
Concentration of the $Ag^+$ ions in a saturated solution of $Ag_2C_2O_4$ is $2.2 \times 10^{-4}\, mol\, L^{-1}$ Solubility product of $Ag_2C_2O_4$ is :-
An example of a sigma bonded organometallic compound is :
The following equilibrium constants are given $N _{2}+3 H _{2} \rightleftharpoons 2 NH _{3} ; K _{1}$ $N _{2}+ O _{2} \rightleftharpoons 2 NO ; K _{2}$ $H _{2}+1 / 2 O _{2} \rightleftharpoons H _{2} O ; K _{3}$ The equilibrium constant for the oxidation of the $NH _{3}$ by oxygen to give $NO$ is:
$HgCl_2$ and $I_2$ both when dissolved in water containing $I^-$ ions the pair of species formed is :
It is because of inability of $ns^{2}$ electrons of the valence shell to participate in bonding that:-
It is because of inability of $ns^{2}$ electrons of the valence shell to participate in bonding that:-