List of top Questions asked in Bihar Board Class XII

Which of the following statements is true?
Electrometallurgical process is used for the extraction of which of the following metals?
An ore having two different metal atoms is
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?
The IUPAC name of \( \text{CH}_3\text{CH}= \text{CH}_2\text{CHO} \) is
Formalin is the commercial name of
An aldehyde on oxidation gives
Chloretone is formed when chloroform reacts with
The general molecular formula of saturated monocarboxylic acids is
By which of the following formic acid and formaldehyde can be distinguished?
Isotonic solutions have the same
An azeotropic mixture of HCl and \( \text{H}_2\text{O} \) boils at
A charge of 96500 coulomb liberates ............. from the solution of CuSO₄.
The cell constant of a conductivity cell is
The electromotive force of the cell \( \text{Zn} | \text{ZnSO}_4 || \text{CuSO}_4 | \text{Cu} \) is 1.1 volts. Its cathode is
Who gave the theory of ionisation?
The rate of reaction of a substance depends upon
A vitamin which plays a vital role in the coagulating property of blood is
Chloramine-T is a/an
Hydrazine is a drug which is used in the treatment of which of the following?
Which of the following is an alkaloid?
Which of the following is a natural rubber?
A raw material used in making nylon is