List of top Chemistry Questions

The ratio of rate of diffusion of SO$_2$ to CH$_4$ is
Which of the following conditions are not suitable for a spontaneous reaction?
The element with the electronic configuration [Kr]4d$^{10}$5s$^0$ is
The frequency band for uplink satellite communication in the following is
Consider the following statements
Statement (A): The resistance of an ideal diode in forward biased condition is zero.
Statement (B): In a half wave rectifier, the load current flows only for every half cycle of the input signals.
Statement (C): In the breakdown region, a zener diode behaves as a constant voltage source.
The ratio of radii of second orbit of hydrogen atom to fourth orbit of He$^+$ ion is
The velocity of the electron in Bohr’s first orbit is \( x \times 10^6 \, \text{ms}^{-1} \). The deBroglie wavelength associated with it (in nm) is (Given: \( m_e = 9 \times 10^{-31} \, \text{kg}, \, h = 6.6 \times 10^{-34} \, \text{Js} \))
The molecule which has more number of lone pair of electrons than the bond pair of electrons in its central atom is
Arrange the following in the correct order of their bond orders: N$_2$, O$_2$, O$_2^+$, O$_2^-$
A light from Paschen series of hydrogen atom is able to eject photoelectrons from a metal. Then the work function of the metal is
What are the oxidation states of the three Br atoms in the molecule \( \mathrm{Br_3O_6} \)?
The bond lengths of \( \mathrm{C_2} \), \( \mathrm{N_2} \), and \( \mathrm{B_2} \) molecules are \( X_1 \), \( X_2 \), and \( X_3 \) pm respectively. The correct order of their bond lengths is:
Arrange the following in decreasing order of their pK$_b$ values:
Arrange the following in decreasing order of their pKb values:
Identify the major product formed in the following reaction sequence:
ch3cocl/anhyd alcl3
Identify the major product formed from the following:
Nai/dry acetone
Arrange the following in increasing order of their reactivity for nucleophilic addition reaction:
Arrange the following in increasing order of their reactivity for nucleophilic addition reaction:
When 1-chlorobutane is treated with aqueous KOH it gives P. However, when treated with alcoholic KOH it gives Q. Identify P and Q respectively.
What are x and y in the following reaction?
$x \text{Pb}_3\text{O}_4 \rightarrow y \text{PbO} + \text{O}_2$
Which of the following is correct related to the colours of TiCl$_3$ (X) and [Ti(H$_2$O)$_6$]Cl$_3$ (Y)?
Photographic plates are prepared by coating emulsion of which of the following in gelatin?
The diameter range of colloidal particles is approximately:
Assertion (A): HCl gas is dried by passing through concentrated H$_2$SO$_4$
Reason (R): HCl gas reacts with NH$_3$ that gives white fumes
The catalyst used in the manufacture of polyethylene is a mixture of
The number of network solids and ionic solids in the list given below is respectively
H$_2$O (ice), AlN, Cu, CaF$_2$, diamond, MgO, CCl$_4$, ZnS, Ag, NaCl, SiO$_2$
If molten NaCl contains SrCl$_2$ as impurity, crystallization can generate