List of top Chemistry Questions asked in Bihar Board XII

Which of the following elements has electronic configuration \( 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6 4d^10 5s^2 4d^10 5p^1 \)?
Which of the following oxides of nitrogen is called laughing gas?
Alkyl halides form ethers by reacting with which of the following?
Chloretone is formed when chloroform reacts with
The general molecular formula of saturated monocarboxylic acids is
An aldehyde on oxidation gives
By which of the following formic acid and formaldehyde can be distinguished?
The IUPAC name of \( \text{CH}_3\text{CH}= \text{CH}_2\text{CHO} \) is
Formalin is the commercial name of
An azeotropic mixture of HCl and \( \text{H}_2\text{O} \) boils at
The electromotive force of the cell \( \text{Zn} | \text{ZnSO}_4 || \text{CuSO}_4 | \text{Cu} \) is 1.1 volts. Its cathode is
Isotonic solutions have the same
A charge of 96500 coulomb liberates ............. from the solution of CuSO₄.
The cell constant of a conductivity cell is
Who gave the theory of ionisation?
Chloramine-T is a/an
Hydrazine is a drug which is used in the treatment of which of the following?
\( \text{F}_2\text{C} = \text{CF}_2 \) is a monomer of which of the following?
Which of the following is a natural rubber?
A raw material used in making nylon is
A vitamin which plays a vital role in the coagulating property of blood is
Which of the following is an alkaloid?
Which of the following has the smallest bond angle?
The number of unpaired electrons in \( \text{Cu}^{2+} \) ion (Z = 29) is
The maximum oxidation state of chromium is