Bihar Board (BSEB) - Class 12 (Intermediate) previous year questions (PYQ)

Directions: In the question below, a statement of Assertion (A) is followed by a statement of Reason (R). Choose the correct option:

Assertion (A): The electrical conductivity of an intrinsic semiconductor increases with rise in temperature.

Reason (R): With increase in temperature, covalent bonds rupture, generating additional free conduction electrons and mobile holes.

Directions: In the question below, a statement of Assertion (A) is followed by a statement of Reason (R). Choose the correct option:

Assertion (A): Rusting of iron in moist air is an exothermic chemical oxidation process.

Reason (R): Rusting requires continuous absorption of thermal energy from ambient surroundings to proceed.

Higher Academic Core: In advanced conceptual study of 'वैद्युतरसायन (Electrochemistry)' in Physical, Inorganic & Organic Chem, which foundational mechanism is universally verified?

Directions: In the question below, a statement of Assertion (A) is followed by a statement of Reason (R). Choose the correct option:

Assertion (A): Systemic arteries have thick, elastic muscular walls compared to veins.

Reason (R): Arterial blood flows under high, pulsatile hydrostatic pressure generated by ventricular systole.

Blossom English (Class 1-5): What is the core message of 'बंधुत्व, जाति तथा वर्ग (आरंभिक समाज)'?

Directions: In the question below, a statement of Assertion (A) is followed by a statement of Reason (R). Choose the correct option:

Assertion (A): Addition of a non-volatile solute lowers the freezing point of a solvent.

Reason (R): Solute molecules reduce the equilibrium vapor pressure of the solution according to Raoult's Law.

Refer to the Case Study 'Case Study: Hazardous Enterprise and Supreme Court Doctrine of Absolute Liability' to answer:

Which Fundamental Right under Part III of the Constitution was invoked as the constitutional foundation for environmental protection?

Directions: In the question below, a statement of Assertion (A) is followed by a statement of Reason (R). Choose the correct option:

Assertion (A): The Simon Commission was met with widespread nationwide boycotts and black flag protests upon landing in Bombay in 1928.

Reason (R): The British colonial government failed to appoint a single Indian representative to the seven-member Indian Statutory Commission.

Directions: In the question below, a statement of Assertion (A) is followed by a statement of Reason (R). Choose the correct option:

Assertion (A): Terrace farming is widely practiced in hilly and mountainous agro-ecosystems.

Reason (R): Terraces create stepped flat platforms along slopes that significantly reduce the surface velocity of water runoff and prevent topsoil erosion.

Blossom English (Class 1-5): What is the core message of 'व्यावसायिक पर्यावरण'?

Directions: In the question below, a statement of Assertion (A) is followed by a statement of Reason (R). Choose the correct option:

Assertion (A): Carboxylic acids exhibit higher acidity than corresponding phenols.

Reason (R): The carboxylate anion is stabilized by two equivalent resonance structures where negative charge resides on electronegative oxygen atoms.

Directions: In the question below, a statement of Assertion (A) is followed by a statement of Reason (R). Choose the correct option:

Assertion (A): Danger signals on communication towers and traffic posts are always illuminated in red color.

Reason (R): Red light has the longest wavelength in the visible spectrum and suffers minimum Rayleigh scattering ($I \propto 1/\lambda^4$) through fog and smoke.

Directions: In the question below, a statement of Assertion (A) is followed by a statement of Reason (R). Choose the correct option:

Assertion (A): Electric current in a conductor is treated as a scalar physical quantity.

Reason (R): Although electric current has both magnitude and direction, it does not obey the laws of vector addition.

Directions: In the question below, a statement of Assertion (A) is followed by a statement of Reason (R). Choose the correct option:

Assertion (A): The Simon Commission was met with widespread nationwide boycotts and black flag protests upon landing in Bombay in 1928.

Reason (R): The British colonial government failed to appoint a single Indian representative to the seven-member Indian Statutory Commission.

स्वास्थ्य, पोषण व स्वच्छता: 'अभिवृत्ति एवं सामाजिक संज्ञान' की कमी से मानव शरीर में कौन-सा रोग हो सकता है?

दशमलव एवं भिन्न संक्रिया: 'समाकलन (Integrals)' का सरलतम भिन्न रूप अथवा दशमलव मान क्या होगा?

Refer to the Case Study 'Case Study: Hazardous Enterprise and Supreme Court Doctrine of Absolute Liability' to answer:

What is the crucial legal distinction between the English rule of 'Strict Liability' and Indian 'Absolute Liability'?

Directions: In the question below, a statement of Assertion (A) is followed by a statement of Reason (R). Choose the correct option:

Assertion (A): The Simon Commission was met with widespread nationwide boycotts and black flag protests upon landing in Bombay in 1928.

Reason (R): The British colonial government failed to appoint a single Indian representative to the seven-member Indian Statutory Commission.

Directions: In the following question, a statement of Assertion (A) is followed by a statement of Reason (R). Choose the correct option:

Assertion (A): Pure gold (24 karat) is not suitable for making durable jewelry ornaments.

Reason (R): Pure 24 karat gold is extremely soft and malleable, so it is alloyed with copper or silver to enhance its mechanical hardness.

Refer to the Case Study 'Case Study: Hazardous Enterprise and Supreme Court Doctrine of Absolute Liability' to answer:

Which Fundamental Right under Part III of the Constitution was invoked as the constitutional foundation for environmental protection?