Military Technology, Weapons and Chemistry Quiz

The COO- group as part of R-COO-R' is an ester. Esters are formed from the reaction of a carboxylic acid with an alcohol. Amide (A) is -CONH2, amino (B) is -NH2, and acid (D) is -COOH. Esters are known for their pleasant fruity odors.

The -CHO functional group is called an aldehyde. Aldehydes have a carbonyl group (C=O) bonded to at least one hydrogen atom. Acid (A) is -COOH, ester (B) is R-COO-R', and nitro (C) is -NO2. Common aldehydes include formaldehyde and vanilla flavor. Note: The option spells it 'ALDIHYDE' but this is clearly intended to mean aldehyde.

The -F functional group is called fluoro (option D intended, though spelled 'FLORO' with a typo). The correct systematic name is 'fluoro'. Asid (A) appears to be a typo for acid (-COOH), alcohol (B) is -OH, and ester (C) is R-COO-R'. Fluoro compounds include Teflon and many pharmaceuticals.

The -OH functional group is called alcohol (or hydroxy when named as a substituent). Alcohols contain the hydroxyl group bonded to a carbon atom. Alkene (A) refers to C=C double bonds, chloro (B) is -Cl (with typo), and amide (D) is -CONH2. Common examples include ethanol and methanol.

Apache is a helicopter (AH-64 Apache), while Sidewinder, Patriot, and Brahmos are all missiles/missile systems. This makes Apache the odd one out based on classification.

DEW stands for Directed Energy Weapon, which refers to weapons that emit concentrated energy to damage targets. The other options are fabricated acronyms with no real meaning. Note the typo in the question where 'dor' should be 'for'.

The B-2 Spirit is a strategic bomber with stealth capabilities, designed to penetrate dense anti-aircraft defenses. Unlike the B-52 (conventional bomber), F/A-16 (multirole fighter), or Mirage-2000 (French fighter), the B-2's primary design feature is its low observable stealth technology to avoid detection.

The INSAS rifle was the standard issue assault rifle of the Indian Army during the Kargil War in 1999. It was an indigenous Indian weapon system developed by the Ordnance Factories Board. The MP5 is a German submachine gun, M16 is American, and AWP-Magnum is a sniper rifle variant.

Agni-3 is a ballistic missile (surface-to-surface), while Akash, Astra, and Nag are all surface-to-air missiles (SAM). The key difference is that ballistic missiles follow a ballistic trajectory toward ground targets, whereas SAMs are designed to intercept aircraft or other missiles, making Agni-3 the odd one in this grouping.

The M82A1 is a .50 caliber heavy sniper rifle designed for anti-personnel and anti-materiel operations. It is specifically built for long-range precision engagement. In contrast, MP5 is a submachine gun for close quarters, AK-47 is a general-purpose assault rifle, and FAMAS is a standard assault rifle - none are optimized for sniper operations.

Akash is a surface-to-air missile (SAM) system designed to engage aerial threats from the ground, while Sidewinder, Astra, and AIM-54 Phoenix are all air-to-air missiles (AAMs) launched from aircraft to engage other airborne targets. The question specifically asks which is NOT an AAM.

Explosive blast power is standardized using TNT equivalence - the energy release of any explosive is compared to TNT as the reference standard. RDX and PETN are more powerful than TNT (1.5x and 1.66x respectively), but TNT itself is the baseline reference unit used in explosive yield measurements.

The Claymore M18 is an anti-personnel mine that directs fragmentation in a fan-shaped pattern, not an anti-tank weapon. Anti-tank weapons like ATGMs or HEAT rounds are designed to penetrate armored vehicle armor, whereas the Claymore uses steel balls to incapacitate personnel in its kill zone.

At standard atmospheric pressure (1 atm or 101.325 kPa), pure water boils at exactly 100 degrees Celsius. This is the boiling point at which water vapor pressure equals atmospheric pressure. The question specifies normal atmospheric pressure, which makes 100°C the correct answer.

At higher altitudes, atmospheric pressure is lower, which causes water to boil at temperatures below 100°C. Since the maximum temperature reached by boiling water is lower, food takes longer to cook. This is a real phenomenon observed in hill stations and mountains.

A pressure cooker traps steam, increasing the pressure inside. Higher pressure raises the boiling point of water above 100°C, allowing food to cook at higher temperatures and therefore faster. Option C is incorrect because pressure is high, not low. Option D is wrong because water boils at higher temperature, not lower.