List of top Questions asked in MPBSE Class XII Board

Write the chemical reaction of coupling reaction \(\underline{\hspace{2cm}}\)
Write the formula of Hinsberg's reagent \(\underline{\hspace{2cm}}\)
Write the name of monomer of proteins \(\underline{\hspace{2cm}}\)
Which of the following is most acidic?
Molarity of water is \(\underline{\hspace{2cm}}\)
The value of potential of standard hydrogen electrode is \(\underline{\hspace{2cm}}\)
The colour of Ni\(^{2+}\) is \(\underline{\hspace{2cm}}\)
The chemical name of EDTA is \(\underline{\hspace{2cm}}\)
Anisole reacts with concentrated H\(_2\)SO\(_4\) and HNO\(_3\) to yield a mixture of \(\underline{\hspace{2cm}}\)
Methyl amine is \(\underline{\hspace{2cm}}\) and \(\underline{\hspace{2cm}}\) basic than ammonia.
Order of reaction for rate = \( K[A]^{1/2} [B]^{3/2} \) is:
Inner transition element is:
Alkyl iodides are often prepared by the reaction of alkyl chloride/bromides with NaI in dry acetone. This reaction is known as:
Alcohols react with sodium to form:
Formula of Osmotic pressure is:
Write the differences between intrinsic semiconductor and extrinsic semiconductor.
OR
What is P-N junction diode? Describe its use as a full wave rectifier with diagram.
What is an electric cell? Give an example.
OR Write Ohm's law and also draw the graph between voltage and current.
Write any two Postulates of Bohr's model.
OR
Who discovered the nucleus model of atom? Draw its diagram.
What is Self Inductance? Derive an expression for the self-inductance of a solenoid. Also write the factor affecting it.
OR
What is a Transformer? Describe its principle and different types of energy losses in it.
A light bulb is rated at 200 W for a 220 V supply. Find the resistance of the bulb.
OR
A light bulb is rated at 200 W for a 220 V supply. Find the rms current through the bulb.
What is Conjugate focus?
OR
Write any two differences between refractive telescope and reflective telescope.
Compare the resistance of 100 watt and 400 watt of two bulbs if their voltage is same.
OR
What will be the resistance of a wire if their length changes to half of their original length and cross-sectional area changes two times of original?
The radii of curvatures of the focus of a double convex lens are 10 cm and 15 cm and its focal length is 12 cm. What is the refractive index of glass? (Refractive index of air = 1)
OR
A convex lens has 20 cm focal length in air. What is focal length in water? (Refractive index of air-water = 1.33, refractive index for air-glass = 1.5)
Derive an expression for Coulomb's law of electrostatics by Gauss's law.
OR
What is capacity of a conductor? Write the factors affecting the capacity of a conductor.
Write any three differences between electromotive force and potential difference.
OR
Write any three differences between Resistance and Specific Resistance.