General Science & Technology Quiz

Wernicke's area, located in the left temporal lobe, is responsible for language comprehension. Damage causes receptive aphasia - patients can speak fluently but cannot understand language. Broca's area handles speech production, not comprehension.

The Dhruv helicopter (option B) is an indigenous Indian helicopter developed by HAL that has been exported to several countries including Nepal, Ecuador, and Peru. It's a multi-role utility helicopter known for its reliability in high-altitude operations. The BrahMos and Prithvi are missiles, while Saras was an aircraft project that didn't reach export status.

SARANG (option B) is the Indian Air Force's helicopter aerobatic team that performs at air shows, showcasing the maneuvering capabilities of HAL's Dhruv and Cheetak helicopters. The name means 'peacock' in Sanskrit, referring to the team's colorful display. ICBMs are missiles, ISRO deals with space, and indigenous artillery guns are different defense equipment.

ARJUN is an indigenous Indian Main Battle Tank developed by DRDO, and BHISHMA is the Indian designation for the T-90 tank used by the Indian Army. Both are tanks, not missiles.

Nishant is India's Unmanned Aerial Vehicle (UAV) developed by the Aeronautical Development Establishment (ADE) for reconnaissance and surveillance operations. It is not a missile system.

Dennis Ritchie created the C programming language at Bell Labs in the early 1970s. John Kemeny and Thomas Kurtz created BASIC. Grace Hopper developed FLOW-MATIC and worked on COBOL. Anders Hejlsberg created Turbo Pascal and later C# and TypeScript.

Bjarne Stroustrup created C++ as an extension of the C programming language at Bell Labs in 1979. Dennis Ritchie created C. Anders Hejlsberg created Turbo Pascal, Delphi, C#, and TypeScript. Grace Hopper pioneered early programming languages like FLOW-MATIC and COBOL.

James Gosling created Java at Sun Microsystems in the mid-1990s. It was originally called 'Oak' and designed for interactive television. Dennis Ritchie created C. John Backus led the development of FORTRAN. Grace Hopper worked on COBOL and early programming language development.

Rasmus Lerdorf created PHP in 1994 for tracking his online resume. It originally stood for 'Personal Home Page' but now means 'PHP: Hypertext Preprocessor'. Guido van Rossum created Python. John Backus developed FORTRAN. Brendan Eich created JavaScript.

Brendan Eich created JavaScript in 1995 while working at Netscape. It was developed in just 10 days and originally called Mocha, then LiveScript. James Gosling created Java. Anders Hejlsberg created Turbo Pascal, Delphi, C#, and TypeScript. Larry Wall created Perl.

At 25°C and 1 atm pressure, sound travels at approximately 346 m/s, so 330 m/s (option C) is closest. Sound speed varies with temperature - about 331 m/s at 0°C, increasing roughly 0.6 m/s per degree. 110 m/s and 230 m/s are too slow, 490 m/s is too fast.

A magnifying glass uses a convex lens (thicker at center) to converge light rays, creating a magnified virtual image. Concave lenses diverge light. Plano-concave is flat on one side and curves inward on the other.

When a compressed spring is released, stored elastic potential energy converts to kinetic energy as the spring moves. Magnetic, electrical, and light energy are not involved in this mechanical transformation.

A gold-leaf electroscope detects electric charge - when charged, the thin gold leaves repel each other. Thermometers measure temperature, ammeters measure current, and electrodes are conductors, not detectors.

1 Calorie (with capital C) is the heat needed to raise 1g water by 1°C - this is the kilocalorie. 1 calorie (lowercase c) is much smaller. 1 Joule is the SI unit but equals only 0.24 calories.

When parallel light rays from a distant source (effectively at infinity) pass through a convex lens, they converge at a single point called the focus or focal point. This is a fundamental property of converging lenses. A parabola is a curve, not a point. The center refers to the optical center, not where rays converge. Infinity is where the rays originate, not where they meet.

Ethanol production through fermentation requires starch or sugar-rich feedstocks. Sugarcane is a major source globally, especially in Brazil. Corn and potatoes are starch sources, while sugarcane provides sucrose directly. Yams are also starch sources but less common commercially. Greens and spices are not carbohydrate-rich enough for efficient ethanol production.

Amorphous carbon lacks long-range crystalline structure, unlike diamond which has a perfect crystal lattice. The term 'amorphous' literally means without form or structure. Diamond and gemstone refer to specific crystalline forms. Steel is an alloy containing iron, not pure carbon.

ATP (Adenosine Triphosphate) releases energy when hydrolyzed to ADP (Adenosine Diphosphate) and inorganic phosphate. This reaction powers most cellular processes. AOP, ADT, and ARP are not standard biochemical molecules - they appear to be distractors. The ATP-ADP cycle is fundamental to cellular energy transfer.

Natural gas is preferred for heating because it burns cleanly, has high energy density, and produces a high-temperature flame. The high flame temperature makes it efficient for heating applications. 'Slow' and 'fast' are not standard descriptors for flame temperature - the quality is high or low temperature.