List of top Chemistry Questions

Which one of the following electromagnetic radiation has more frequency?
Order of energy of orbitals
Four quantum numbers of valence electron of sodium
Mixing acid to water is
Bleaching Powder is formed from
The classification of elements which is based on atomic number is
Which of the following electronic configuration violating Hund's rule ?
The total number of atomic orbitals in third shell of an atom
Colour of anhydrous \(CuSO_4\) is
Which of the following artificial sweeteners can be used in soft drinks only?
The equilibrium constant, \(K_C\) for \(3C_2H_2(g) \rightleftharpoons C_6H_6(g)\) is 4 L\(^2\)mol\(^{-2}\). If the equilibrium concentration of benzene is 0.5 mol/L, then what is the value of concentration of ethylene?
A commercially sold conc. HCl is 35% HCl by mass. If the density of this commercial acid is 1.46 g/mL, the molarity of this solution is :
(Atomic mass : Cl = 35.5 amu, H = 1 amu)

Which among the following reactions does NOT form alkyl halides?

Which property of CO2 makes it biologically and geo-Chemically important?
KMnO$_4$ acts as an oxidising agent in acidic medium. The number of moles of KMnO$_4$ that will be required to react with one mole of oxalate ions (to form CO$_2$) in acidic solution is:
The colour of \( \text{CrO}_4^{2-} \) changes to \( \text{Cr}_2\text{O}_7^{2-} \) is
Which of the following gas readily de-colourises the acidified KMnO\(_4\) solution?
Which of the following gas readily de-colourises the acidified KMnO\(_4\) solution?
In which of the following changes, entropy decreases?
Which of the following is highly basic?
What will be the density of \( N_2 \) gas at 230°C and 3 atm pressure? (Given \( R = 0.082 \, \text{L atm} \, \text{mol}^{-1} \, \text{K}^{-1} \))
Calculate the molar conductance of 0.025M aqueous solution of calcium chloride at 25°C. The specific conductance of calcium chloride is \( 12.04 \times 10^{-2} \, \text{S} \, \text{m}^{-1} \)
The monosaccharides of maltose is
On treatment of glucose with bromine water the product formed is
Which of the following vitamin is responsible for beri-beri disease?