List of top Chemistry Questions

Which of the following is Indian saltpetre?
Identify the correct trend of acidic strength for the given alcohols:
correct trend of acidic strength for the given alcohols:

In the Lewis dot structure of carbonate ion ($ \text{CO}_3^{2-} $), what are the formal charges on oxygen atoms 1, 2, and 3 respectively?

Arrange the following species in the decreasing order of their bond orders. NO \quad NO$^+$ \quad NO$^-$ (I) \quad (II) \quad (III)
Which among the following will have highest density?
The maximum number of electrons present in an orbital with \(n = 4,\ l = 3\) is
Assertion (A): 16th group elements have higher ionization enthalpy values than 15th group elements in the corresponding periods.
Reason (R): 15th group elements have half-filled stable electronic configuration.
In the reaction of phosphorous with conc. HNO3, the oxidized and reduced products respectively are
The number of radial nodes and angular nodes in a 4f orbital are respectively:
A reaction gas mixture contains 50%, 30%, 20% of A, B and C by volume respectively. The mixture undergoes the following reactions: \[ \text{(i) } A + 2B \rightarrow P_1 \\ \text{(ii) } 2P_1 + 3C \rightarrow P_2 \] Choose the correct answer if the reaction completes.
Identify the correct statements from the following: (a) Alkali metals are strong reducing agents. (b) KO$_2$ is a diamagnetic oxide. (c) Lithium chloride exists as LiCl . 2H$_2$O
How many grams of Mg is required to completely reduce 100 mL, 0.1 M $\mathrm{NO}_3^-$ solution using the following reaction? $\mathrm{NO}_3^- + \mathrm{Mg} \to \mathrm{Mg}^{2+} + \mathrm{NH}_3$
The product formed in the given reaction is Phenylmagnesium bromide (C$_6$H$_5$-MgBr) reacting with D$_2$O, leading to product ?.
Identify the correct statements:
The molecule which has more number of lone pair of electrons than the bond pair of electrons in its central atom is
Elements A and B have FCC and BCC structures respectively with unit cell edge length \( a = 3 \, \text{Å} \).
The number of atoms in 210 g of A = number of atoms in 594 g of B.
If density of A is \( 7 \, \text{g/cm}^3 \), what is the density of B?

Identify the product(s) formed in the following reaction:

The ratio of effective number of atoms in a unit cell of fcc and bcc lattices is
Among the ions O$^{2-}$, Na$^+$, F$^-$, N$^{3-}$, Mg$^{2+}$ the ions with smallest and largest radii are respectively
Which of the following is correct for fcc lattice?
Identify the correct statements about the anomalous behavior of Boron.
In which of the following, oxides of three elements X, Y, and Z are arranged in increasing order of acidic nature? Their electronic configurations are:
X: $[Ne] 3s^2 3p^1$, \quad Y: $[Ne] 3s^2 3p^3$, \quad Z: $[Ne] 3s^2$

The wavelength associated with the electron moving in the first orbit of hydrogen atom with velocity $ 2.2 \times 10^6\, \text{m/s} $ is (in nm):
(Given: $ m_e = 9.0 \times 10^{-31}\, \text{kg},\ h = 6.6 \times 10^{-34}\, \text{Js} $)

Which of the following solids is not a molecular solid?
The pair of elements that form both oxides and nitrides, when burnt in air are