Science – Easy Level – GK Questions

Ohm's Law: Voltage (V) = Current (I) × Resistance (R). Valid for ohmic conductors at constant temperature. Foundation for circuit analysis. [[NCERT Physics Class 10]]

Autotrophs (e.g., plants, cyanobacteria) synthesize organic compounds from inorganic sources via photosynthesis/chemosynthesis. They form the base of food chains. Basic ecology concept. [[NCERT Biology Class 12]]

In light-dependent reactions, water photolysis splits H₂O into O₂, protons, and electrons. The O₂ is released as byproduct. Confirmed by isotopic labeling experiments. [[NCERT Biology Class 11]]

Biogas (from anaerobic digestion of organic waste) contains 50-75% methane (CH₄), a clean fuel. Promoted under GOBAR-DHAN scheme for rural energy and waste management. [[MNRE Reports, NCERT Chemistry Class 11]]

PM2.5 particles are fine inhalable particles (≤2.5 μm) that penetrate deep into lungs, causing respiratory/cardiovascular issues. Monitored under National Air Quality Index. [[CPCB Reports, NCERT Geography Class 11]]

Conduction occurs via molecular collisions in solids (e.g., metal rod heating). Convection involves fluid movement; radiation uses electromagnetic waves. Basic thermodynamics concept. [[NCERT Physics Class 11]]

Harvested rainwater percolates into aquifers, replenishing groundwater tables. Critical for sustainable water management in water-stressed regions like India. [[CGWB Reports, NCERT Geography Class 11]]

As per Solid Waste Management Rules 2016: Green bin = wet/biodegradable waste (food scraps); Blue = dry/recyclable; Red = domestic hazardous. Important for civic awareness questions. [[MoHUA Guidelines, NCERT Geography Class 11]]

1 Byte = 8 bits (binary digits). This standard unit conversion is essential for understanding computer memory, data transfer rates, and digital storage concepts. [[NCERT Computer Science]]

Fertilization (sperm-egg fusion) happens in the ampulla region of fallopian tube. The zygote then implants in uterus. Critical for human reproduction topics. [[NCERT Biology Class 12]]

Alveoli are microscopic sacs surrounded by capillaries. Oxygen diffuses into blood, CO₂ diffuses out. Their large surface area (~70 m²) enables efficient respiration. Key anatomy concept. [[NCERT Biology Class 11]]

pH < 7 indicates acidic solution; pH > 7 is basic; pH = 7 is neutral. pH scale measures hydrogen ion concentration. Fundamental for acid-base chemistry in exams. [[NCERT Chemistry Class 10]]

Solids have fixed shape and volume due to strong intermolecular forces holding particles in fixed positions. Liquids have fixed volume but variable shape; gases have neither. Basic concept in matter classification. [[NCERT Chemistry Class 9]]

Myopia is corrected using concave (diverging) lenses. Convex (converging) lenses correct hypermetropia (farsightedness). Understanding lens applications is essential for optics questions in exams. [[NCERT Physics Class 10]]

Acceleration (a = Δv/Δt) measures how quickly velocity changes. It's a vector quantity with SI unit m/s². Negative acceleration is deceleration. Fundamental in kinematics for physics exams. [[NCERT Physics Class 9]]

Photovoltaic (PV) cells in solar panels convert sunlight directly into electricity via the photovoltaic effect. This clean energy technology is promoted under India's National Solar Mission. [[MNRE Reports, NCERT Geography Class 11]]

Prokaryotes (e.g., bacteria) lack a membrane-bound nucleus; their DNA floats in the nucleoid region. Eukaryotes (plants, animals) have a true nucleus. This distinction is fundamental in biology classification. [[NCERT Biology Class 11]]

HTTP (HyperText Transfer Protocol) is the foundation of data communication on the World Wide Web. It enables loading of web pages using hypertext links. HTTPS adds encryption for security. Crucial for computer awareness sections. [[NCERT Computer Science]]

Sodium chloride (NaCl) is common table salt, formed by ionic bonding between sodium (Na⁺) and chloride (Cl⁻) ions. It's essential for nerve function and fluid balance in humans. [[NCERT Chemistry Class 10]]

Sound requires a medium (solid, liquid, or gas) to propagate as mechanical waves. In vacuum, there are no particles to vibrate, so sound cannot travel. This explains why space is silent. [[NCERT Physics Class 9]]