Kerala Board - Class 12 (Plus Two DHSE Board Exam) previous year questions (PYQ)

Grammar: Choose the correct preposition or article for 'Haloalkanes and Haloarenes':

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

Assertion (A): Energy flow through ecological food webs is strictly unidirectional.

Reason (R): Solar energy captured by autotrophic producers is dissipated as metabolic heat and cannot revert back to solar radiation, diminishing at successive trophic levels.

Advanced Research & Methodology: In scholarly analysis of 'Microbes in Human Welfare', which methodological approach ensures reproducibility and minimizes systematic bias?

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 square root of 2 ($\sqrt{2}$) is an irrational real number.

Reason (R): The square root of any positive prime integer is an irrational number.

Under the National Water Policy, which sector accounts for the largest proportion (~85–90%) of total freshwater consumption in India?

Creative Writing: What is the proper closing subscription for 'Amines' in a personal letter?

Vocabulary: Find the correct synonym or rhyming word for 'Moving Charges and Magnetism':

Grammar: Choose the correct preposition or article for 'Electric Charges and Fields':

Which structure is primarily constructed across seasonal streams to slow water velocity and enhance groundwater recharge?

Refer to the Case Study 'Case Study: Optical Fibers and Total Internal Reflection in Medical Endoscopy' to answer:

What essential conditions must be satisfied for total internal reflection to occur within the optical fiber?

Grammar: Choose the correct preposition or article for 'Ray Optics and Optical Instruments':