List of top Chemistry Questions

Solution with pH less than 7 is
In endothermic reaction, heat is
The orbital with more penetration power towards nucleus is
Which of the following is a non metal?
Which one of the following metal occurs in the native form?
Compound formed when excess \(CO_2\) is passed through lime water
4f elements are called as
Maximum number of electrons present in an orbital of atom is
Identify an acidic flux among the following.
Which of the following electronic configuration violating Hund's rule ?
The classification of elements which is based on atomic number is
The total number of atomic orbitals in third shell of an atom
Mixing acid to water is
Bleaching Powder is formed from
Four quantum numbers of valence electron of sodium
Which one of the following electromagnetic radiation has more frequency?
Colour of anhydrous \(CuSO_4\) is
Order of energy of orbitals
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?

Which among the following reactions does NOT form alkyl halides?

Which property of CO2 makes it biologically and geo-Chemically important?
The P – O bond order in \( \text{PO}_4^{3-} \) is
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