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Which initiative provides free Wi-Fi in public places across India?
- BharatNet
- PM-WANI
- Digital Saksharta Abhiyan
- Common Service Centres
Answer: PM-WANI
PM-WANI (Prime Minister's Wi-Fi Access Network Interface) enables public Wi-Fi through PDOAs/PDOs. Aims to boost digital inclusion and internet penetration. Part of Digital India. [[MeitY Reports]]
The SI unit of pressure is ________.
- Newton
- Pascal
- Joule
- Watt
Answer: Pascal
Pascal (Pa) = N/m². Atmospheric pressure ≈ 101,325 Pa = 1 atm. Barometer measures pressure; manometer measures gas pressure. Essential for fluid mechanics. [[NCERT Physics Class 11]]
True or False: Ribosomes are the site of protein synthesis in cells.
- True
- False
Answer: True
Ribosomes (80S in eukaryotes, 70S in prokaryotes) translate mRNA into polypeptide chains. Found free in cytoplasm or bound to ER. Fundamental cell biology. [[NCERT Biology Class 11]]
Which compound is used as an antacid?
- NaCl
- NaHCO₃
- HCl
- H₂SO₄
Answer: NaHCO₃
Sodium bicarbonate (baking soda) neutralizes excess stomach acid (HCl), relieving acidity. Modern antacids use Mg(OH)₂, Al(OH)₃. Common application of acid-base chemistry. [[NCERT Chemistry Class 10]]
The Chipko Movement, aimed at forest conservation, originated in the state of ________.
- Uttarakhand
- Himachal Pradesh
- Kerala
- Karnataka
Answer: Uttarakhand
Chipko (1970s, Uttarakhand): villagers hugged trees to prevent logging. Pioneered eco-feminism and community-based conservation. Landmark environmental movement in India. [[MoEFCC, NCERT Geography Class 11]]
True or False: Heisenberg's uncertainty principle states that position and momentum cannot be precisely measured simultaneously.
- True
- False
Answer: True
Δx·Δp ≥ h/4π: fundamental limit in quantum mechanics, not due to measurement errors. Highlights probabilistic nature of microscopic world. [[NCERT Physics Class 12]]
Urea is synthesized in the:
- Kidney
- Liver
- Lungs
- Skin
Answer: Liver
Liver converts toxic ammonia (from protein metabolism) to less toxic urea via ornithine cycle. Urea is excreted by kidneys. Key for nitrogenous waste management. [[NCERT Biology Class 11]]
The primary structure of a protein refers to the sequence of ________.
- Nucleotides
- Amino acids
- Fatty acids
- Monosaccharides
Answer: Amino acids
Primary structure: linear sequence of amino acids linked by peptide bonds. Determines higher-order folding and function. Central to biochemistry. [[NCERT Chemistry Class 12]]
True or False: Algorithmic bias in AI systems can perpetuate social inequalities.
- True
- False
Answer: True
AI trained on biased data may discriminate in hiring, lending, policing. Ethical AI requires fairness, transparency, accountability. Emerging topic for governance sections. [[NITI Aayog Principles for Responsible AI]]
Which law states that induced EMF opposes the change causing it?
- Faraday's Law
- Lenz's Law
- Ampere's Law
- Gauss's Law
Answer: Lenz's Law
Lenz's Law: direction of induced current opposes flux change (conservation of energy). Faraday's Law gives magnitude. Together they describe electromagnetic induction. [[NCERT Physics Class 12]]
The voice box in humans is called the ________.
- Pharynx
- Larynx
- Trachea
- Bronchus
Answer: Larynx
Larynx contains vocal cords; vibration produces sound. Epiglottis prevents food entry during swallowing. Key anatomy for physiology questions. [[NCERT Biology Class 11]]
True or False: The half-life of a first-order reaction is independent of initial concentration.
- True
- False
Answer: True
t₁/₂ = 0.693/k for first-order reactions. Unlike zero/second-order, it doesn't depend on [A]₀. Useful for radioactive decay calculations. [[NCERT Chemistry Class 12]]
World Environment Day is celebrated on:
- March 22
- April 22
- June 5
- December 10
Answer: June 5
World Environment Day (June 5) was established by UN in 1972 to raise global environmental awareness. India hosted the first celebration. Important for current affairs. [[UNEP, NCERT Geography Class 11]]
The kinetic energy of a body is directly proportional to the square of its ________.
- Mass
- Velocity
- Momentum
- Acceleration
Answer: Velocity
KE = ½mv²: kinetic energy ∝ mass and ∝ (velocity)². Doubling speed quadruples KE. Critical for mechanics and safety calculations. [[NCERT Physics Class 11]]
True or False: All birds are oviparous.
- True
- False
Answer: True
All birds lay eggs (oviparous). No viviparous birds exist. Contrast with mammals where most are viviparous except monotremes. Basic zoology fact. [[NCERT Biology Class 11]]
Which complex exhibits geometrical isomerism?
- [Ni(CN)₄]²⁻
- [Co(NH₃)₆]³⁺
- [Pt(NH₃)₂Cl₂]
- [Fe(CN)₆]⁴⁻
Answer: [Pt(NH₃)₂Cl₂]
Square planar [Pt(NH₃)₂Cl₂] shows cis-trans isomerism. Tetrahedral/octahedral symmetric complexes don't. Important for stereochemistry in coordination compounds. [[NCERT Chemistry Class 12]]
PDF stands for ________ Document Format.
- Portable
- Printable
- Personal
- Public
Answer: Portable
PDF (Portable Document Format), developed by Adobe, preserves formatting across devices/platforms. Widely used for official documents, e-books, forms. Basic computer awareness. [[NCERT Computer Science]]
True or False: A plane mirror always forms a real image.
- True
- False
Answer: False
Plane mirrors form virtual, erect, same-size images behind the mirror. Real images can be projected on screen; virtual cannot. Fundamental ray optics concept. [[NCERT Physics Class 10]]
Deficiency of which hormone causes diabetes insipidus?
- Insulin
- ADH
- Thyroxine
- Cortisol
Answer: ADH
ADH (Antidiuretic Hormone/Vasopressin) from posterior pituitary promotes water reabsorption in kidneys. Deficiency causes excessive dilute urine (diabetes insipidus), distinct from diabetes mellitus. [[NCERT Biology Class 11]]
Tollens' reagent is used to distinguish aldehydes from ketones by producing a ________ mirror.
- Gold
- Silver
- Copper
- Platinum
Answer: Silver
Tollens' test: Aldehydes reduce [Ag(NH₃)₂]⁺ to metallic silver (silver mirror); ketones don't react. Classic test for carbonyl compounds. [[NCERT Chemistry Class 12]]