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Question 1192

Body temperature of a healthy human body is usually around:

A98.4 °C

B37 °C

C14.5 °C

D25 °C

Show answerB. 37 °CThe normal body temperature of a healthy human being is approximately 37 °C, which is equivalent to 98.6 °F. This temperature is maintained through a balance between heat production and heat loss in the body. The body’s thermoregulation is controlled by the hypothalamus in the brain to ensure proper functioning of enzymes and metabolic processes. Other options (for context) 98.4 °C: Incorrect — the correct equivalent in Fahrenheit is 98.6 °F, not in Celsius. 14.5 °C: Much lower than the human body temperature — such a value would indicate hypothermia or death. 25 °C: Represents a mild room temperature, not body temperature.
Question 1191

One (1) molecule of CFC deplete __________ molecule of Ozone in the Ozonosphere.

A1,00,000

B10,000

C10,00,000

DNo one of the above

Show answerA. 1,00,000One molecule of a Chlorofluorocarbon (CFC) can destroy up to 1,00,000 molecules of ozone (O₃) in the ozone layer. When CFCs reach the stratosphere, they are broken down by ultraviolet (UV) radiation, releasing chlorine atoms. Each chlorine atom acts as a catalyst in the breakdown of ozone molecules, significantly depleting the protective ozone layer that shields Earth from harmful UV rays. Other options (for context) 10,000: Underestimates the destructive potential of a single CFC molecule. 10,00,000: Overestimates the number of ozone molecules destroyed. No one of the above: Incorrect — the correct answer is 1,00,000 molecules of ozone.
Question 1189

Average distance of the earth from the Sun is:

A150 Million km

B15 Million km

C90 Million km

D900 Million km

Show answerA. 150 Million kmThe average distance between the Earth and the Sun is approximately 150 million kilometers (or about 1 Astronomical Unit – 1 AU). This distance serves as a standard unit of measurement for describing distances within our solar system. Despite slight variations due to Earth's elliptical orbit, this average remains nearly constant and is crucial for maintaining suitable conditions for life on Earth. Other options (for context) 15 Million km: Far too close — the Earth would be extremely hot and uninhabitable. 90 Million km: Shorter than the actual average distance. 900 Million km: Much greater — about six times the real distance, closer to Saturn’s orbit.
Question 1185

__________ is the first missile developed in India.

AAgni

BAakash

CTrishul

DPrithvi

Show answerD. PrithviExplanation: Prithvi was the first indigenously developed missile of India, designed under the Integrated Guided Missile Development Programme (IGMDP) launched in 1983 by the Defence Research and Development Organisation (DRDO). It is a surface-to-surface short-range ballistic missile (SRBM) capable of carrying both conventional and nuclear warheads. The Prithvi missile series includes Prithvi-I (Army version), Prithvi-II (Air Force), and Prithvi-III (Navy), with ranges varying from 150 km to 350 km.
Question 1179

Which of the following pairs is incorrect ? (A) Roentgen : X-ray (B) Newton : Law of gravitation (C) Faraday : Diffusion of gases (D) Pasteur : Bacteriology

ARoentgen : X-ray

BNewton : Law of gravitation

CFaraday : Diffusion of gases

DPasteur : Bacteriology

Show answerC. Faraday : Diffusion of gasesExplanation: The incorrect pair is Faraday : Diffusion of gases. The diffusion of gases was studied and explained by Thomas Graham, not by Michael Faraday. Graham’s Law states that the rate of diffusion of a gas is inversely proportional to the square root of its density or molar mass. On the other hand, Michael Faraday is famous for his work on electromagnetism and electrolysis. The other pairs are correctly matched with their discoveries.
Question 1178

What is the unit for measuring the intensity of sound ?

ADecibel

BCoulomb

CHenry

DHertz

Show answerA. DecibelExplanation: The intensity of sound is measured in decibels (dB). The decibel is a logarithmic unit that expresses the ratio of a sound’s intensity compared to a reference level (usually the faintest sound the human ear can detect, known as the threshold of hearing). The higher the decibel value, the louder the sound. For example, normal conversation is around 60 dB, traffic noise is about 80–90 dB, and sounds above 120 dB can cause pain or hearing damage.
Question 1175

What is the other name for Vitamin B2 ?

AHaemoglobin

BDextrose

CThiamine

DRiboflavin

Show answerD. RiboflavinExplanation: Vitamin B2 is also known as Riboflavin. It is a water-soluble vitamin that plays a vital role in the body’s energy production and cellular function. Riboflavin acts as a coenzyme in the metabolism of carbohydrates, fats, and proteins, helping to convert food into energy. It is also essential for maintaining healthy skin, eyes, and nerve functions. A deficiency of Vitamin B₂ can lead to cracked lips, sore throat, and inflammation of the tongue (a condition known as ariboflavinosis).
Question 1172

The speed of light will be minimum while passing through :

AGlass

BVacuum

CAir

DWater

Show answerA. GlassExplanation: The speed of light is maximum in a vacuum (approximately 3 × 10⁸ m/s) and decreases as it passes through denser media. Among the given options — vacuum, air, water, and glass — light travels slowest in glass because glass has the highest refractive index (around 1.5). The greater the refractive index, the slower the light travels. This slowing down of light causes refraction, or bending of light, when it passes from one medium to another.
Question 1080

Which kind of Power accounts for the largest share of power generation in India ?

AHydro-electric

BSolar

CThermal

DNuclear

Show answerC. ThermalExplanation: In India, the largest share of electricity generation comes from thermal power. Thermal power plants generate electricity by using heat energy, primarily produced by burning coal, natural gas, or oil. Among these, coal-based thermal power contributes the majority. Although renewable sources like solar and hydro power are growing rapidly, thermal energy still accounts for over 70% of India’s total electricity production. This dominance is due to the abundant availability of coal and the extensive infrastructure built around it.
Question 1063

Electric appliances have star rating ( upto 5 stars) on them. More the number of stars : 1. longer is the life span of the appliance 2. more stringent is the quality checks 3. Higher is the energy efficiency of the appliance Which of the above is / are correct ?

A1 only

B3 only

C1 and 2 only

D1, 2 and 3

Show answerB. 3 onlyExplanation: The star rating system seen on electrical appliances (like ACs, refrigerators, and fans) represents the energy efficiency of the product. It is issued by the Bureau of Energy Efficiency (BEE), under the Ministry of Power, Government of India. The more the number of stars (up to 5), the higher the energy efficiency — meaning the appliance consumes less electricity for the same performance. However, the star rating does not indicate the lifespan or the quality checks of the appliance.
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