List of top Chemistry Questions

Which of the following has highest pKa value?
Hinsberg reagent is
Which reagent gives as major product from phenol
The \( K_c \) of the reaction \[ \text{NH}_3(g) + \text{O}_2(g) \rightleftharpoons 2\text{NO}(g) \] at 1500 K is 0.1. What is the concentration of NO, when the initial concentration of \( \text{N}_2 \) and \( \text{O}_2 \) is 0.04 mol?
Ratio of between the maximum wavelength of Lyman and Balmer series.
If ‘m’ is the molality, ‘M’ is the molarity, ‘d’ is the density in g/cm\(^3\) and ‘M\(_2\)’ is the molarity of solute. What is the relation between them?
Which of the following have minimum and maximum threshold energy K, Na, Mg, Li?
Number of C−C, C−H, C=C in But-2-ene-1-yne respectively
The isomerism shown by the following compound: \[ [\text{Co}(CN)_6][\text{Cr}(NH_3)_6] \quad [\text{Co}(CN)_6][\text{Cr}(NH_3)_6] \]
P\(_4\) \(\rightarrow\) PH\(_3\) + H\(_2\)PO\(_2\)
Oxidation state of phosphorus change from -------- to -------- respectively.
There is 40 % C, 67% H2, find the empirical formula
Which 3d series of element has least enthalpy of atomization?
Energy of \(2h\nu_0\) fall on a metal of work function \(h\nu_0\) cause velocity of \(v_1\), when \(5h\nu_0\) fall velocity ratio of \(v_1/v_2\)
The KE of particle of mass \(1 \times 10^{-31}\) Kg and the de Broglie wavelength 63 nm (h = \(6.3 \times 10^{-34}\))
Decreasing order basic strength
What is 1-chlorocyclohexene?
What is the IUPAC name of Mesityl oxide?
IUPAC name of Element number 105?
What is the SI unit of molar conductivity?
Which of the following is not used as a parameter for the classification of polymers?
Which of the following has the least atomic radius?
Identify the major product formed when Ethyl Bromide reacts with alcoholic KOH.
What is the energy of a photon of frequency \( \nu \)?
What is the SI unit of molar conductivity?
Identify the product when Phenol reacts with Bromine water.