True/False – GK Questions

Pi bonds in C=C are weaker and more reactive than sigma bonds, allowing addition of H₂, X₂, HX, etc. Alkanes (only sigma bonds) undergo substitution. Core organic reaction mechanism. [[NCERT Chemistry Class 11]]

Adiabatic process: Q=0, so ΔU = -W. Temperature changes due to work done. Applies to rapid compression/expansion (e.g., diesel engine, atmospheric phenomena). [[NCERT Physics Class 11]]

Test cross determines genotype of dominant phenotype: if any recessive offspring appear, the parent is heterozygous. Fundamental tool in Mendelian genetics. [[NCERT Biology Class 12]]

Kaziranga (inscribed 1985) hosts ~70% of world's greater one-horned rhinos. It also protects tigers, elephants, and wetland biodiversity. Important for environment and geography exams. [[UNESCO, MoEFCC Reports]]

2FA combines something you know (password) with something you have (OTP/app) or something you are (biometric). This layered approach significantly reduces unauthorized access risks. [[CERT-In Guidelines, NCERT Computer Science]]

Modulation (AM/FM) enables efficient transmission of audio/video signals over long distances by shifting them to higher frequencies suitable for antenna radiation. Core concept in telecommunications. [[NCERT Physics Class 12]]

Bryophytes (mosses, liverworts) need water for sperm to swim to egg during fertilization, though they live on land. This dual dependency earns them the 'amphibians' title. Key concept in plant evolution. [[NCERT Biology Class 11]]

Work W = F·d·cosθ. If θ=90°, cos90°=0, so W=0. Example: centripetal force does no work in circular motion. Key concept in mechanics. [[NCERT Physics Class 11]]

5G uses three spectrum bands: low-band (<1 GHz), mid-band (1-6 GHz), and high-band mmWave (24-47 GHz). Each offers different coverage/speed trade-offs. Important for tech awareness. [[TRAI Reports, NITI Aayog]]

Oxidation is loss of electrons (OIL: Oxidation Is Loss); reduction is gain of electrons (RIG). Mnemonic helps avoid confusion in redox reactions. [[NCERT Chemistry Class 11]]

Most mammals are viviparous (live birth), but monotremes like platypus and echidna are oviparous (egg-laying). Exceptions are important for taxonomy questions. [[NCERT Biology Class 11]]

Displacement (shortest path) is always ≤ distance traveled (actual path). They are equal only for straight-line motion without direction change. Fundamental kinematics concept. [[NCERT Physics Class 11]]

As per WHO and CPCB, prolonged exposure above 85 dB can cause hearing damage. Noise pollution regulations limit industrial/residential noise levels. Important for environmental awareness. [[CPCB Guidelines, NCERT Geography Class 11]]

At dynamic equilibrium, forward and reverse rates are equal (not zero), so concentrations remain constant. Reactions continue but with no net change. Key concept in chemical kinetics. [[NCERT Chemistry Class 11]]

Meiosis produces four genetically unique haploid cells (gametes) due to crossing over and independent assortment. Mitosis produces two identical diploid cells. Critical for genetics. [[NCERT Biology Class 11]]

Pitch depends on frequency (higher frequency = higher pitch). Amplitude determines loudness. Confusing these is a common exam trap. [[NCERT Physics Class 9]]

While Bitcoin popularized blockchain, its applications include supply chain tracking, voting systems, healthcare records, and smart contracts. Decentralized ledger technology has broad utility. [[NITI Aayog Reports]]

EDTA (ethylenediaminetetraacetate) is a hexadentate ligand, forming six coordinate bonds with metal ions. Used in chelation therapy and water softening. Important for advanced chemistry. [[NCERT Chemistry 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]]

Bernoulli's principle: in a flowing fluid, pressure decreases as speed increases (conservation of energy). Explains airplane lift, venturi effect. Common misconception in exams. [[NCERT Physics Class 11]]