List of top Chemistry Questions asked in AIIMS

When nitric acid reacts with nitric oxide, a gas is released, which converts $H _{2} S$ into
When NO reacts with $FeSO _{4}$, a brown coloured complex is formed. In the complex, the coordination number of Fe is $+6$.
The value of van der Waals' constant ' $a$ ' for ammonia is larger than that of nitrogen gas. Molecular weight of ammonia is smaller than nitrogen gas.
For the reaction, $2 NO (g)+ O _{2}(g) \rightleftharpoons 2 NO _{2}(g),$ increase in pressure favours the formation of $NO _{2}$. The reaction is exothermic.
Which of the following is an example of chain silicates?
The $pH$ of the digestive juices within the human small intestine is between $7.5$ and $8.5$. This environment is slightly
The $M - O - M$ bond angles in $M_2O$ (where $M$ is halogen) is in the order
The correct order of stability of the superoxides is
In zone refining method, the molten zone
In Oppenauer's oxidation,
In an isobaric process, when temperature changes from $T_1$ to $T_2$, $\Delta S$ is equal to
If heavy water is taken as solvent instead of normal water while performing Cannizaro reaction, the products of the reaction are
Formula of microcosmic salt is
Formation of alcohol by oxymercuration- demercuration of alkenes
The $S-S-S$ bond angle in $S_8$ molecule is $105^{\circ}$. $S_8$ has a V-shape.
Millon?? test is a test for identification of proteins. Millon?? reagent is a solution of mercurous nitrate and mercuric nitrate in nitric acid containing little nitrous acid.
Bleaching powder is a mixed salt. In the presence of $COCl _{2}$, bleaching powder decomposes to give $CaCl _{2}$ and $O _{2}$.
Among the alkali metals, lithium salts exhibit the least electrical conductance in aqueous solutions. Smaller the radius of the hydrated cation, lower is the electrical conductance in aqueous solutions.
A compound with delocalised electrons is more stable than that compound would be if all its electrons were localised. The extra stability, a compound gains as a result of having delocalised electrons, is called delocalisation energy.
$1.575\, g\, H _{2} C _{2} O _{4} \cdot 2 H _{2} O$ in $250 \,mL$ solution makes it $0.1 \,N$. $H _{2} C _{2} O _{4} \cdot 2 H _{2} O$ is a dihydrate organic acid.
Which of the following coordination entities should be expected to absorb light of lowest frequency?
Select the incorrect statement, among the following.
Which of the following azeotropic solutions has the boiling point less than boiling point of the constituents $A$ and $B$?
For which of the following pairs, magnetic moment is same?
A sample of $0.42 \,mg \,{ }^{233} UF _{6}$ shows an activity of $9.88 \times 10^{4}$ count per second. Its $t_{1 / 2}$ is