Kerala Board - Class 10 (Kerala SSLC Board Exam) previous year questions (PYQ)

[MAT] In a certain code language, 'ROSE' is written as '6821' and 'CHAIR' is written as '73456'. How is 'SEARCH' written in that code?

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.

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

Assertion (A): White light disperses into its constituent seven spectral colors when passed through a glass prism.

Reason (R): Different wavelengths of light travel with different speeds in glass, causing red light to deviate the least and violet light to deviate the most.

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

Assertion (A): Work done by an electrostatic field in moving a test charge along a closed path is zero.

Reason (R): The electrostatic Coulomb force is a conservative force whose line integral around any closed loop vanishes identically.

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.

സ്ഥാനവില (Place Value): 'രണ്ടാംകൃതി സമവാക്യങ്ങൾ (Second Degree Equations - $x = \frac{-b \pm \sqrt{b^2-4ac}}{2a}$)' സംഖ്യയിലെ അക്കങ്ങളുടെ ശരിയായ സ്ഥാനവില എത്രയാണ്?

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.

[SAT] What is the commercial unit of electrical energy consumed in Indian households?

Refer to the Case Study 'Case Study: Parabolic Cable Geometry in Civil Engineering Suspension Bridges' to answer:

What geometric property distinguishes the vertex of the upward-opening parabola $y = ax^2 + c$ ($a > 0$)?

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.