Science & Technology: Mobile Phones, Computers & Chemistry

Freon is a trade name for chlorofluorocarbon (CFC) refrigerants, particularly CFC-12 (dichlorodifluoromethane), which was widely used in refrigeration and air conditioning before being phased out due to ozone depletion concerns under the Montreal Protocol.

The ozone hole over Antarctica was first discovered in 1985 by a team of British scientists (Farman, Gardiner, and Shanklin) using ground-based measurements from Halley Bay station, published in the journal Nature.

Aspirin's chemical name is acetylsalicylic acid (C9H8O4), a widely used pain reliever and anti-inflammatory medication. The other options are incorrect chemical compounds.

Antifreeze used in vehicles is primarily ethylene glycol, which lowers the freezing point of water in cooling systems. Other glycol variants exist but ethylene glycol is the standard antifreeze compound.

Baking soda's chemical name is sodium bicarbonate (NaHCO3), a white crystalline compound used in baking and as an antacid. It should not be confused with sodium carbonate (washing soda) or calcium compounds.

Common table salt is sodium chloride (NaCl), the chemical compound used for food seasoning and preservation. The other chloride compounds listed serve different industrial purposes.

Chalk is chemically known as calcium carbonate (CaCO3), a soft white sedimentary rock. Sodium compounds (A, C) are incorrect because chalk contains calcium, not sodium. Calcium bicarbonate (B) is Ca(HCO3)2, which is soluble and chemically distinct from insoluble chalk.

The correct answer is 'Hibernate'. Hibernate saves the most power because it saves your session to the hard drive and completely powers off the computer. Sleep and Standby use some power to maintain the session in RAM. Lock User just locks the screen but keeps everything running.

The correct answer is 'C168'. The C168 was a Motorola handset model. The 1110 and 3110 were Nokia models. C130 was not a Motorola model.

The correct answer is 'Symbian ^3'. At the time this question was written, Symbian ^3 was Nokia's latest operating system. Android and iOS are from Google and Apple respectively. Bada was Samsung's OS.

VIRUS is commonly expanded as 'vital information resource under seize' in basic computer quizzes. This backronym was created after the term 'virus' was already used for malicious software. Note that in reality, VIRUS is not a standard acronym.

Nokia C5-03 was released with a 5 megapixel camera. Nokia 3110 is a very basic phone without a camera, Nokia 3250 has a 2MP camera, and Nokia X3 has a 3.2MP camera.

In Yahoo! Messenger, the keyboard shortcut Ctrl+G was used to send a 'buzz' notification to your chat friend to get their attention. Alt+B, Ctrl+B, and Alt+G are not the correct shortcuts.

Nokia 6600 was one of Nokia's best-selling smartphones, particularly popular in markets like India. While Nokia 3250, X6, and 5200 were sold, the 6600 achieved exceptional sales volume during its peak.

BSNL, being a state-owned telecom operator, was the first to launch 3G services in India. Private operators like IDEA and AIRTEL launched 3G later after the auction process.

Samsung Wave 2 runs on Samsung's Bada OS, not Android. Bada was Samsung's proprietary smartphone operating system before they fully transitioned to Android.

Android OS is developed by Google (through the Open Handset Alliance), not Apple. Apple develops iOS for their devices.

None of the listed phones (Samsung Galaxy S, Samsung Wave, Nokia X6) were originally released as dual-SIM variants. All were single-SIM phones in their initial launch versions.

Samsung Galaxy Ace featured a sliding QWERTY keypad. Samsung Galaxy Fit and LG Optimus typically used touchscreen interfaces, and Nokia X6 was a touchscreen-only device without a physical keyboard.