List of top Chemistry Questions

Define order of a reaction.
How will you confirm the presence of five -- OH groups in a glucose molecule, which are attached to different carbon atoms ?
Write any two fat soluble vitamins.
What are essential amino acids ?
What are the products obtained on hydrolysis of sucrose ?
How will you convert nitromethane to methyl isocyanide ?
Complete the following equation :
Define limiting molar conductivity.
Name the cell which was used in the Apollo space programme for providing electrical power.
State Henry's law. Calculate the mole fraction of \(CO_2\) in water at \(298\,K\) under \(760\,mm\,Hg\). (Given : \(K_H\) for \(CO_2\) in \(H_2O\) at \(298\,K = 1.25 \times 10^6\,mm\,Hg\))
1.00 molal aqueous solution of trichloroacetic acid is heated to its boiling point. Boiling point of this solution was found to be \(100.18^\circ C\). Calculate the van't Hoff factor for trichloroacetic acid. (Given : \(K_b\) for water \(= 0.512\;K\,kg\,mol^{-1}\))
Write the product when benzaldehyde reacts with \(Zn(Hg)/\)conc. HCl.
Write the reaction involved in Etard reaction.
Arrange the following compounds in increasing order of their reactivity towards HCN : \[ (CH_3)_3C-CO-CH_3,\qquad CH_3COCH_3,\qquad CH_3CHO \]
Why are \(\alpha\)-hydrogen atoms of aldehydes and ketones acidic in nature ?
Draw the structure of the semicarbazone of acetone.
Write the name of the reagent used to transform Allyl alcohol to Propenal.
Write a simple chemical test to distinguish between Ethanal and Propanal.
Write the product(s) when : (I) One mol of ethanal is treated with 1 mol of \(CH_3OH\) in the presence of dry HCl gas. (II) Benzaldehyde is treated with conc. NaOH. (III) Ethanoic acid is heated in the presence of \(P_2O_5\).
What happens when an acidic solution of the green compound (B) is allowed to stand for some time ? Also write the equation involved. What is this type of reaction called ?
A black-brown coloured solid (A) when fused with KOH in the presence of air, produces a dark green coloured compound (B) which on electrolytic oxidation in alkaline medium gives a dark purple coloured compound (C). Identify (A), (B) and (C). Write the reactions involved.
Write the ionic equations for the oxidizing action of (MnO_4^-) in acidic medium with : (I) (Fe^2+) ion (II) (I^-) ion
Describe giving reason which one of the following pairs has the property indicated : (I) Fe or Cu -- higher melting point (II) (Ti^3+) or (Sc^3+) -- coloured in aqueous solution (III) Cr or Zn -- higher third ionisation enthalpy
Why is it necessary to use salt bridge in a galvanic cell ?
Why does a mercury cell deliver a constant voltage for its entire life ?