List of top Questions asked in Bihar Board XII- 2025

Which of the following electrolytes is the least effective in causing coagulation of colloidal solution of ferric hydroxide?
Which of the following is an emulsifier ?
Which of the following catalysts is used in Haber’s process for the manufacture of ammonia ?
Water soluble vitamin is
The purine base present in RNA is
The IUPAC name of CH$_3$COOC$_2$H$_5$ is
The general formula of an amine is
Which of the following is Hinsberg reagent?
is a
The source of fats and oils is
The specific rate constant of a first order reaction depends upon
The hydrolysis of ethyl acetate in the presence of dil. NaOH is a reaction of which order?
Which of the following cannot show linkage isomerism?
Reaction of primary amine with chloroform in the presence of alcoholic KOH is called
Which of the following is chloral?
Which of the following has zero dipole moment?
The IUPAC name of CH$_3$-CH-CH$_3$-CH$_2$Cl is
Which of the following would give Aldol condensation reaction?
Vinegar contains
Which of the following is not a colligative property?
An aqueous solution of which of the following compounds shows abnormal osmotic pressure?
The solution which shows positive or negative deviation from Raoult's law is called
Isotonic solutions have equal
The structure of complex ion [Ni(CN)$_4$]$^{2-}$ is
The hybridization of S in SO$_3$ is