General Science & Technology Quiz

Valence electrons are the outermost electrons involved in chemical bonding and reactions, determining how atoms interact. Protons and neutrons are in the nucleus and don't directly participate in chemical bonding, while 'Neucleous' is a misspelling.

Gamma rays are electromagnetic radiation with no charge, so they experience no electrical force in an electric field. Electrons, beta particles (electrons), and alpha particles (helium nuclei) all have charge and are affected by electric fields.

When an atom decays to an intermediate state instead of directly to ground state, it emits a photon with less energy. Red light has less energy than green light (longer wavelength), while blue and violet have more energy. White light contains all colors.

The identity of an element is determined by the number of protons (atomic number). Helium has 2 protons. Adding a neutron changes the isotope (to Helium-3 or Helium-4/5) but the element remains Helium. Adding a proton would create Lithium.

Water has strong hydrogen bonding due to its polar nature (oxygen is electronegative, creating partial charges), requiring more energy to break these bonds and boil. Methane is nonpolar with only weak London dispersion forces, explaining its much lower boiling point.

Air is a homogeneous mixture of gases (nitrogen, oxygen, argon, CO2, etc.), making it a solution composed entirely of gases. Petroleum is liquid hydrocarbon mixture, soda is liquid with dissolved gas, and Kool-Aid is solid dissolved in liquid.

The MiG-29K is a carrier-based fighter aircraft operated from aircraft decks, specifically designed for the Indian Navy's INS Vikramaditya and INS Vikrant. SU-30MKI is an air superiority fighter for land bases, while MiG-21 Bison and MiG-27 are land-attack aircraft that operate from runways, not carriers.

Kilo-class refers to a type of diesel-electric submarine built by Russia and operated by several navies including India. These are attack submarines designed for stealth and anti-submarine warfare. 'Aircraft', 'Ships', and 'Missiles' are different military categories.

INSAS (Indian Small Arms System) was the standard issue assault rifle for the Indian Army until recently. AK-47 is widely used globally but not the standard Indian issue; AK-108 is not a standard model; SLR (Self-Loading Rifle) is a different class of weapon. Note: This question may be dated as the Army is transitioning to newer rifles.

India's AWACS (Airborne Warning and Control System) aircraft, like the Phalcon, are supplied by Israel under a tripartite deal with Russia. These provide aerial surveillance and battle management. The US, Russia, and France are not the suppliers for India's AWACS fleet.

INS Arihant, India's first nuclear-powered submarine, was built at the Ship Building Centre in Visakhapatnam. This facility specializes in submarine construction. Kochi, Mumbai, and Kolkata have major shipyards but not for nuclear submarines.

The average healthy adult human has a resting pulse rate of approximately 72 beats per minute, with normal range typically 60-100 bpm. Options like 16 bpm are far too low (bradycardia), while 100 bpm is at the upper limit of normal. 65 bpm is within normal range but 72 is the standard average.

Quinine is a traditional medication extracted from cinchona tree bark, used for centuries to treat malaria by killing the Plasmodium parasite in red blood cells. It is not effective against typhoid, acne (pimples), or AIDS.

Crop rotation prevents nutrient depletion by alternating different crops with varying nutrient needs, including legumes that fix nitrogen back into soil. Monoculture depletes specific nutrients, while excessive tilling disrupts beneficial soil structure and irrigation alone doesn't replenish nutrients.

The pericardium is a protective, fluid-filled double-layered sac that encloses the heart and reduces friction during heartbeat. Myocardium is heart muscle tissue, ventricle is a chamber, and septum is the dividing wall between heart chambers.

The sinoatrial (SA) node initiates each heartbeat by generating electrical impulses that spread through the heart's conduction system, earning it the 'pacemaker' designation. The AV node delays impulses, Purkinje fibers conduct them to ventricles, and endocardium is the heart's inner lining.

Darwinian fitness specifically measures an organism's reproductive success - how many viable offspring it produces that contribute genes to the next generation's gene pool. Health and environmental stability are factors that might influence fitness, but not the measure itself. Genetic recombination is a mechanism, not a fitness metric.

Broccoli and cauliflower are cruciferous vegetables rich in sulforaphane and other compounds that studies suggest have cancer-preventive properties. They contain antioxidants and glucosinolates that support cellular health. This statement is scientifically supported.

High intake of animal fat is associated with increased cancer risk, while plant fiber has protective effects. Eating more animal fat and less fiber would increase, not decrease, cancer risk according to current nutritional science.

The small intestine is the longest section of the digestive tube, typically 6-7 meters in adults. It includes duodenum, jejunum, and ileum. The stomach is a J-shaped organ, large intestine is about 1.5 meters, and esophagus is approximately 25cm.